Diagram sections — 34 (89 total)
AIR CONDITIONING ANTI-LOCK BRAKES ANTI-THEFT BODY CONTROL MODULES COMPUTER DATA LINES COOLING FAN CRUISE CONTROL DEFOGGERS ELECTRONIC POWER STEERING ELECTRONIC SUSPENSION ENGINE PERFORMANCE EXTERIOR LIGHTS GROUND DISTRIBUTION HEADLIGHTS HORN INSTRUMENT CLUSTER INTERIOR LIGHTS MEMORY SYSTEMS NAVIGATION PASSIVE RESTRAINTS POWER DISTRIBUTION POWER DOOR LOCKS POWER MIRRORS POWER SEATS POWER TOP/SUNROOF POWER WINDOWS RADIO SHIFT INTERLOCK STARTING/CHARGING SUPPLEMENTAL RESTRAINTS TRANSMISSION TRUNK, TAILGATE, FUEL DOOR WARNING SYSTEMS WIPER/WASHER
AIR CONDITIONING Automatic A/C Wiring Diagram, Front (2 of 2) for Lexus LS 430 2003 List of elements for Automatic A/C Wiring Diagram, Front (2 of 2) for Lexus LS 430 2003: 108 (at left radiator side support) ec (near ecm, in protective case) junction connector 1 +b1 A/c ambient A/c comp relay A/c control assembly (behind right side of dash) A/c evaporative temperature sensor A/c ig fuse 7.5a A/c magnetic clutch & lock sensor (on right side of engine) A/c room temperature sensor (behind left center of dash) A13 Abodr Abopa Absdr Abspa Acmg Aif Air Air inlet control servo motor Air mix control servo motor (driver) Air mix control servo motor (passenger) Air vent mode control servo motor (driver) Air vent mode control servo motor (passenger) Amdb Amdr1 Amdr2 Amdr3 Amdr4 Ampb Ampa1 Ampa2 Ampa3 Ampa4 Aodb Aodr1 Aodr2 Aodr3 Aodr4 Aopb Aopa1 Aopa2 Aopa3 Aopa4 C-gnd Computer data lines system Cool air bypass servo motor (driver) Cool air bypass servo motor (passenger) Cooling fan ecu (on front center of engine compt, on radiator support) D-sig Duct sensor (driver) (behind upper left side of dash) Duct sensor (passenger) (behind upper right side of dash) Ed (at top left of firewall) Ef (at left side of cylinder head) Engine control module (on left front of engine compt, in protective case) Engine room 1 j/b (on left front of engine compt, behind headlight) Etam Exhaust gas sensor (on right side of engine, on exhaust system) Fan fuse 50a Fan relay Fr ig fuse 7.5a Frs Fusible link block (on right rear of engine compt) Gnd Hot at all times Hot in on or start Jinction connector (below engine room 1 j/b & engine room 1 r/b) Junction connector 3 (near engine control module, in protective case) Junction connector 4 (near engine control module, in protective case) Junction connector 7 (below engine room 1 j/b c & engine room 1 r/b) Lcki Magnetic field sensor (w/ compass) (behind center of dash) Mopen Mpx1 Mpx2 Mshut Nca Nox Open Pnk Rec Red Rfc S5-3 S5-5 Sg-1 Sg-2 Sg-3 Sg-4 Sg-5 Sg-7 Shield Short connector s1, s2 Shut Tam Tel1 Telephone transceiver & speaker relay (w/ lexus link system: on right side of luggage compt) (w/o lexus link system: on left side of luggage compt) Telin Temperature sensor (behind left side of bumper fascia) Tfacedr Tfacepa Tpbdr Tpbpa Tpi Vmid Water valve servo motor Wvig Wvo Wvs
ANTI-LOCK BRAKES Anti-lock Brakes Wiring Diagram (1 of 2) for Lexus LS 430 2003 List of elements for Anti-lock Brakes Wiring Diagram (1 of 2) for Lexus LS 430 2003: 75 (under fusible link block) +bi +bm Abs & trac & vsc actuator (on left rear of engine compt, near brake master cylinder) Abs 1 fuse 40a Abs 2 fuse 40a Abs 3 fuse 7.5a Abs motor relay Abs sol relay Ast Brake fluid level warning switch (on master cylinder reservoir) Computer data lines system Eb (under fusible link block) Ec (at left radiator side support) Eng+ Eng- Engine control module (on left front of engine compt, in protective case) Engine room 3 r/b (on left rear of engine compt) Fl+ Fl- Flo Fr+ Fr- Fro2 Fss Fusible link block (on right rear of engine compt) Gnd Gnd1 Gnd2 Gnd3 Gnd4 Headlight beam level control ecu (behind right side of dash) Hot at all times Junction connector 3 (near engine control module, in protective case) Lbl- Left front abs speed sensor Master cylinder pressure sensor Mpx1 Mpx2 Mr2 Nca Neo Pmc Pnk Pps solenoid (on left front of engine compt) R1+ R2+ Red Right front abs speed sensor S10 S13 Sflh Sflr Sfrh Sfrr Skid control ecu (behind left side of dash) Smc1 Smc2 Smv1 Smv2 Sol+ Sol- Spdl Spdr Srcf Srcr Srlh Srlr Srmf Srmr Srrh Srrr Trc+ Trc- Vcm Anti-lock Brakes Wiring Diagram (2 of 2) for Lexus LS 430 2003 List of elements for Anti-lock Brakes Wiring Diagram (2 of 2) for Lexus LS 430 2003: 80 (at left side of dash) ig +bo Abs ind Abs-ig fuse 7.5a Air suspension ecu (w/ electronic modulated air suspension) (behind right side of dash) Bat Brake pedal load sensing switch (on brake pedal bracket, above brake pedal) Chs+ Chs- Combination meter Computer data lines system Cpu Csw D/g Data link connector (dlc) 3 (below left side of dash) Dome fuse 10a Driver side j/b (at left kick panel) Driver side j/b ecu (at left kick panel) E10 E13 E14 E16 Ess Fro Fsw+ Fsw- Gauge fuse 7.5a Ggnd Gl1 Gl2 Gyaw Hot at all times Hot in on or start Ig1 Ih (at right side of shift lever) Ik (at right side of firewall) J12 J13 J16 J17 Junction connector (behind upper center of dash) Junction connector 12 & 13 (behind upper center of dash) Junction connector 16 & 17 (behind upper center of dash) Left rear abs speed sensor Mpx-b2 fuse 7.5a Mpx1 Mpx2 Nca Parking brake switch (behind left end of dash, on parking brake mechanism) Passenger side j/b (at right kick panel) Pkb Pnk Red Right rear abs speed sensor Rl+ Rl- Rr+ Rr- S11 S12 Skid control ecu (behind left side of dash) Slip ind Sp1 Speedo- meter Ss1+ Ss1- Steering sensor (inside top of steering column) Stop fuse 5a Stoplight switch (above brake pedal, on bracket) Stp Traction control switch Trig Vgs Vsc off ind Vsc warning buzzer (behind lower left side of dash) Vys Yaw Yaw rate sensor (below rear of center console) Yaw2 Yss
ANTI-THEFT Anti-theft Wiring Diagram (1 of 2) for Lexus LS 430 2003 List of elements for Anti-theft Wiring Diagram (1 of 2) for Lexus LS 430 2003: 89 (16-19 not used pins) (25-27 not used pins) (6-10 not used pins) (at right side of shift lever) ih +b1 +b2 A j10 Acc Air bag sensor assembly (behind lower center of dash, on transmission tunnel) B j15 Bdr Bzr Bzr2 Bzr3 Bzrg Cpse Cpub Cty D-acc fuse 7.5a D24 D25 Data Dle Door lock control receiver (inner mirror) Driver door ecu (inside front of left front door) Driver side j/b (at left kick panel) E j11 E10 E11 Engine room 2 r/b (on left front of engine compt, behind headlight) F11 F16 F17 F18 Front controller Front passenger door ecu (inside right front door) Gateway ecu (behind left end of dash) Ground Gsw Hot at all times Hot in on or start I15 I19 Ii (at right side of shift lever) Ill+ Ind Ind2 J/c 10 & 11 (behind upper center of dash) J/c 14 & 15 (behind upper center of dash) J/c 21 (forward of left rear fenderwell) J/c 27 (forward of right rear fenderwell) J14 Keyless buzzer (inside top of left front fender, near base of ``a" pillar) Keyless buzzer on/off switch Kul Left front door courtesy switch Left front door lock motor Lsw Mpd1 Mpd2 Mpl1 Mpl2 Mpx-ig fuse 7.5a Mpx1 Mpx2 Mul Passenger side j/b (at right kick panel) Pct Pnk Power window master switch Pwe Pws Rc0 Rda Red Right front door courtesy switch Right front door lock control switch Right front door lock motor Rssi Security fuse 7.5a Security indicator light Sh- Sig Theft deterrent ecu (behind upper right center of dash) Theft deterrent horn (on right rear of engine compt) W/l Warning system Wls1 Wlsw Anti-theft Wiring Diagram (2 of 2) for Lexus LS 430 2003 List of elements for Anti-theft Wiring Diagram (2 of 2) for Lexus LS 430 2003: 87 (at left radiator side support) ec (behind upper center of dash) transponder key computer (on right side of steering column) transponder key amplifier Agnd Ant1 Ant2 Bdr Bu- Bubs Code Coil Cpse Cpub Cty D door fuse 25a Driver side j/b (at left kick panel) Driver side j/b ecu (at left kick panel) E18 Efii Efio Engine control module (on left front of engine compt, in protective case) Engine hood courtesy switch (on front center of engine compartment) F17 G10 Gnd Ground Hdcy Headlights system Hot at all times Hot in on or start Hrly I10 I13 I19 I21 I22 Ig2 Ig2 fuse 7.5a Ih (at right side of shift lever) Imi Imo J/c 10 & 12 (behind upper center of dash) J/c 12 & 13 (behind upper center of dash) J/c 21 (forward of left rear fenderwell) J/c 23 (rearward of left rear fenderwell) J/c 24 (on left rear of luggage compt lid) J/c 27 (forward of right rear fenderwell) J/c 30 (rearward of right rear fenderwell) J/c 7 (below engine room 1 j/b & engine room 1 r/b) J10 J11 J12 J13 Key Ksw L12 L14 Left rear door courtesy switch Left rear door ecu (inside left rear door) Left rear door unlock motor Lh rr door fuse 20a Lsw Luggage compartment door key unlock switch Luggage room j/b Luggage room j/b ecu (on left side of luggage compartment) Mpx- Mpx-b1 fuse 7.5a Mpx1 Mpx2 P door fuse 25a P-gnd Passenger side j/b (at right kick panel) Pcti R13 R14 Red Rh rr door fuse 20a Right rear door courtesy switch Right rear door ecu (inside right rear door) Right rear door unlock motor Rxck Sel1 Sig Tkul Txct Vc12 Warning system
BODY CONTROL MODULES Driver Side J/B ECU Wiring Diagram for Lexus LS 430 2003 List of elements for Driver Side J/B ECU Wiring Diagram for Lexus LS 430 2003: 91 (w/ compass) (w/o compass) Acc Am1 fuse 7.5a Anti-lock brakes system Anti-theft system B/anc Bes Bklr Bu+ Bu- Cltb Clte Clts Computer data lines system D b/anc fuse 5a Dbil Dbkl Dbm+ Dmb- Driver side j/b (at left kick panel) Driver side j/b ecu E17 Engine controls system Exterior lights system Fuel Gnd Gnd2 Haz Haz fuse 15a Hdcl Hdcy Head Headlights system Hot at all times Hot in run or start Hrly Ig (at left side of dash) Ignition switch Ih (at right side of shift lever) Instrument cluster system Interior lights system J/c 12 & 13 (behind upper center of dash) J/c 14 & 15 (behind upper center of dash) J12 J13 J14 J15 Lock Mind Mirrors system Mpx-b Mpx-b3 fuse 7.5a Mpx-ig Mpx-ig fuse 7.5a Mpx1 Mpx2 Mpx3 Msw Panel fuse 7.5a Panel1 Panel2 Passenger side j/b (at left kick panel) Passenger side j/b (at right kick panel) Passenger side j/b ecu Passive restraint system Pnk R/e Red Ret Rtr Run Shift interlock system Start Stp Stpa Stpi Stpo Sw1 Sw2 Sw3 Tr+ Tr1 Tr2 Tr3 Trunk, tailgate, fuel doors system Tsw Turn lh Turn rh Warning system Wiper/washer system Front Controller Wiring Diagram for Lexus LS 430 2003 List of elements for Front Controller Wiring Diagram for Lexus LS 430 2003: 43 C12 Computer data lines system Cral Crar Driver side j/b (at left kick panel) Engine room 1 r/b (on left front of engine compt, behind headlight) Engine room 2 r/b (on left front of engine compt, behind headlight) Exterior lights system Ffog Fhhi Fhor Fmb3 Fmig Fogl Fogr Fr fog fuse 15a Front controller Ftal Fwas H-lp hi fuse 20a Headlights system Hlhl Hlhr Horh Horl Horn (high) Horn (low) Horn fuse 10a Hot at all times Hot in on or start Ig (at left side of dash) Mpx-b3 fuse 7.5a Mpx-ig fuse 7.5a Mpx1 Mpx2 Passenger side j/b (at right kick panel) Red Sidl Sidr Tail fuse 7.5a Washer fuse 20a Wiper/washer system Wlvl Luggage Room J/B ECU Wiring Diagram for Lexus LS 430 2003 List of elements for Luggage Room J/B ECU Wiring Diagram for Lexus LS 430 2003: 85 (rearward of left rear fenderwell) j/c 23 (rearward of left rear fenderwell) j/c23 Acc Air conditioning system Auto B11 Bck1 Bdcy Bk/up Bq (at right rear seat back) Bubs Computer data lines system Driver side j/b (at left kick panel) Exterior lights system F12 F13 Frs Fsme Fsms Fsmv Fsse Fsss Fssv Fuel opn fuse 10a Fuel opn(o) Fuel opn(p) Fusible link block (on right rear of engine compt) Hic Hot at all times Hot in on or start Instrument cluster system Interior lights system L-o/c(p) L12 L13 L14 Lce1 Lcls Lcm+ Lcm- Lcty Left rear buckle switch (w/ rear power seat) (inside of left rear seat belt buckle) Lgcy Lglp Lopn Lug j/b fuse 50a Luggage room j/b (on left side of luggage compt) Luggage room j/b ecu Mpx Mpx+ Mpx- Mpx-b Mpx-b3 fuse 7.5a Mpx-ig Mpx-ig fuse 7.5a Navigation system P-gnd Passenger side j/b (at Power distribution system Power distribution system Power tops system Power windows system Rbil Red Rfr Rhr Right kick panel) Right rear buckle switch (w/ rear power seat) (inside of right rear seat belt buckle) Rmgv Rsc Rss Smok Stop1 Stop2 Stp1 Stp2 Stp3 Tail1 Tail2 Til1 Til2 Til3 Til4 Tkul Trunk, tailgate, fuel doors system Passenger Side J/B ECU Wiring Diagram for Lexus LS 430 2003 List of elements for Passenger Side J/B ECU Wiring Diagram for Lexus LS 430 2003: 56 Acc Airbag Altl Am1 fuse 7.5a B/anc Back Bkll Computer data lines system Cspt Driver side j/b (at left kick panel) E17 Engine room 1 r/b (on left front of engine compt, behind headlight) Fspt Gnd Gnd1 Hdlv Headlights system Hot at all times Hot in on or start Ignition switch Ii (at right side of shift lever) Ik (at right side of dash) Ile Instrument cluster system Interior lights system Lcty Lock Memory & wiper/washer systems Mpx- Mpx-b Mpx-b2 fuse 7.5a Mpx-ig Navigation system P b/anc fuse 5a Passenger side j/b (at right kick panel) Passenger side j/b ecu Passive restraint system Pbil Pbm+ Pbm- Pind Pnk Pwr Rcty Rrsw Run S/m S/s Snow Start Transmissions system Warning system Wip Wip fuse 30a Wiper/washer system Wng
COMPUTER DATA LINES Data Link Connector Wiring Diagram for Lexus LS 430 2003 List of elements for Data Link Connector Wiring Diagram for Lexus LS 430 2003: 35 (at left kick panel) driver side j/b (at right side of shift lever) ih (behind lower center of dash, on transmission tunnel) air bag sensor assembly (below left side of dash) data link connector (dlc) 3 A21 A24 Air suspension ecu (behind right side of dash) B j3 B j4 Bat C12 C15 Combination meter D/g Ef (on left cylinder head) Engine control module (on left front of engine compt, in protective case) F16 Gateway ecu (behind left side of dash) Hot at all times J/c 12 & 13 (behind upper center of dash) J/c 16 & 17 (behind upper center of dash) J/c 3 & 4 (near engine control module, in protective case) J12 J13 J16 J17 Multi- display Obd fuse 7.5a Opb S11 Sil Skid control ecu (behind left side of dash) Tac Tach Wfse High/Low Bus Wiring Diagram (1 of 2) for Lexus LS 430 2003 List of elements for High/Low Bus Wiring Diagram (1 of 2) for Lexus LS 430 2003: 77 (at right side of shift lever) ih (behind left side of dash) data link connector (dlc) 3 (behind upper center of dash) j/c 12 & 13 Acc Atx+ Atx- Batt Bu+ Bu- Bubs C13 C14 C17 Center cluster integration panel Clearance sonar ecu (on left side of luggage compt) Combination switch D-acc fuse 7.5a D28 Driver seat ecu (below left side of driver's seat) Driver side j/b (at left kick panel) Driver side j/b ecu (at left kick panel) E16 Engine room 2 r/b (on left front of engine compt, behind headlight) F11 F18 Front controller Gateway ecu (behind left end of dash) Gnd Gtx+ Gtx- Hot at all times Hot in on or acc Hot in on or start I14 J/c 10 & 11 (behind upper center of dash) J/c 31 (w/ rear power seat) (behind left rear seat back) J10 J11 J12 J13 L14 Left rear seat ecu (behind left rear seat back) Luggage room j/b ecu (on left side of luggage compt) Mpd1 Mpd2 Mpi1 Mpi2 Mpl1 Mpl2 Mpx Mpx+ Mpx- Mpx-b2 fuse 7.5a Mpx-ig fuse 7.5a Mpx1 Mpx2 Mpx3 Multi- display Passenger side j/b (at right kick panel) Power tilt & power telescopic ecu (behind left side of dash) R25 R27 Radio & player Rear seat control switch Red Sil Theft deterrent ecu (behind upper right center of dash) Transponder key computer (behind upper center of dash) Tx+ Tx- Tx1 Txs+ Txs- W/ navigation W/ park assist W/o navigation Wfse High/Low Bus Wiring Diagram (2 of 2) for Lexus LS 430 2003 List of elements for High/Low Bus Wiring Diagram (2 of 2) for Lexus LS 430 2003: 42 A/c control assembly (behind right side of dash) A11 A24 Air bag Air bag sensor assembly (behind lower center of dash, on transmission tunnel) Combination meter Cpu D25 Driver door ecu (inside front of left front door) Driver side j/b (at left kick panel) E10 E11 Engine control module (on left front of engine compt, in protective case) F13 F17 F18 Front passenger door ecu (inside right front door) I18 Left rear door ecu (inside left rear door) Moon roof control ecu (at front of roof opening) Mpx Mpx+ Mpx- Mpx1 Mpx2 Overhead j/b (at front of roof opening) Passenger side j/b (at right kick panel) Passenger side j/b ecu (at right kick panel) R13 R14 R26 Rain sensor (near top center of windshield) Right rear door ecu (inside right rear door) Right rear seat ecu (behind right rear seat back) S12 Skid control ecu (behind left side of dash) T15 Telephone transceiver & speaker relay (on right side of luggage compt) W/ link system W/ moon roof W/ rain sensor W/ rear power seat
COOLING FAN Cooling Fan Wiring Diagram for Lexus LS 430 2003 List of elements for Cooling Fan Wiring Diagram for Lexus LS 430 2003: 48 (at left radiator side support) ec +b1 A/c comp relay A/c control assembly (behind right side of dash) A/c fuse 7.5a A/c ig fuse 7.5a A/c magnetic clutch & lock sensor (on right side of engine) A11 Acc Acmg Computer data lines system Cooling fan ecu (on front center of engine compt, on radiator support) Driver side j/b (at left kick panel) E14 E17 Ed (at top left of dash) Ef (on left cylinder head) Engine control module (on left front of engine compt, in protective case) Engine coolant temperature sensor (on front center of engine) Engine room 1 j/b (on left front of engine compt, behind headlight) Ethw F12 Fan fuse 50a Fan relay Fr ig fuse 7.5a Fusible link block (on right rear of engine compt) Gnd Hot at all times Hot in on or acc Hot in on or start Ik (at right side of dash) J14 J15 g Junction connector 1 (near engine control module, in protective case) Junction connector 14, junction connector 15 (behind upper center of dash) Junction connector 3 (near engine control module, in protective case) Junction connector 4 (near engine control module, in protective case) Junction connector 7 (below engine room 1 j/b & engine room 1 r/b) Lcki Mpx+ Mpx1 Mpx2 P-acc fuse 7.5a P-ig fuse 7.5a Passenger side j/b (at right kick panel) Rfc Short connector s1, s2 Thw
CRUISE CONTROL Cruise Control Wiring Diagram, with Dynamic Laser Controls (1 of 2) for Lexus LS 430 2003 List of elements for Cruise Control Wiring Diagram, with Dynamic Laser Controls (1 of 2) for Lexus LS 430 2003: 90 (in engine harness, under ecu box) e1 +b1 +bm Accel position sensor (behind left center of dash) At4 Batt C10 C15 Cancel Cchg Ccs Combination switch Computer data lines system Cruise Cruise control switch D position switch (park/neutral position switch) Distance control ecu (behind right side of dash) Driver side j/b (at left kick panel) Driver side j/b ecu (at left kick panel) E9 (in engine harness, under engine room 1 j/b) Ec (at left radiator side support) Ef (on left side of cylinder head) Efi 1 fuse 30a Efi main relay Elc Eng+ Eng+ neo eng- Eng- Engine control module (on left front of engine compt, in protective case) Engine room 1 r/b (on left front of engine compartment, behind headlight) Ep1 Ep2 Epa Eptk Etcs fuse 10a F16 Fr ig fuse 7.5a Gnd Hot at all times Hot in on or start Igb Ign fuse 7.5a Igsw Junction connector 1 & 2 (near engine control module, in protective case) Junction connector 1 & 2 j2 (near engine control module, in protective case) Junction connector 3 (near engine control module, in protective case) Junction connector 7 (below engine room j/b 1 & engine room r/b 1) Laser radar sensor (behind right side of front bumper fascia) Lcs Lgnd Lrdd Lrrd Mode Mpx1 Mpx1 mpx2 s12 Mpx2 Mrel Neo Nssd Obd fuse 7.5a Passenger side j/b (at right kick panel) Pnk Red Res/ acc S13 S2 short conn Set/ coast Sgnd Shift lock control ecu (below shift lever, in center console) Short conn Sil Skid control ecu (behind left side of dash) St1- Stop fuse 5a Stoplight switch (on brake pedal bracket) Stp Stpi Stpo Trc+ Trc+ trc- s10 Trc- Ts sp1 s11 Vcp1 Vcp2 Vcpa Vpa Vpa1 Vpa2 Vptk Wfse Cruise Control Wiring Diagram, with Dynamic Laser Controls (2 of 2) for Lexus LS 430 2003 List of elements for Cruise Control Wiring Diagram, with Dynamic Laser Controls (2 of 2) for Lexus LS 430 2003: 58 (at right side of shift lever) (below left side of dash) data link connector (dlc) 3 (near engine control module, in protective case) junction connector 3 & 4 Bat Center of dash) Combination meter Computer data lines system Cpu Cruise ind Dome fuse 10a Driver side j/b (at left kick panel) E01 E02 E03 E13 E16 E19 Ee (on right side of cylinder head) Ef (on left side of cylinder head) Engine control module (on left front of engine compt, in protective case) Eoil Eta F15 Gauge fuse 7.5a Ge01 Hot at all times Hot in on or start Ih (at right side of shift lever) J16 J17 Junction connector 10 (behind upper center of dash) Junction connector 12 (behind upper Junction connector 13 (behind upper center of dash) Junction connector 16 & 17 (behind upper center of dash) Junction connector 5 (near engine control module, in protective case) Me01 Mpx-b2 fuse 7.5a Oil Passenger side j/b (at right kick panel) Red Shielded Sil Sln+ Sln- Slt+ Slt- Slu+ Slu- Sp2+ Sp2- Speedometer Throttle control motor (on front of engine, on throttle body) Throttle position sensor (on throttle body) Transmissions system Vehicle speed sensor (on transmission) Vta Vta2 Wfse Cruise Control Wiring Diagram, without Dynamic Laser Controls (1 of 2) for Lexus LS 430 2003 List of elements for Cruise Control Wiring Diagram, without Dynamic Laser Controls (1 of 2) for Lexus LS 430 2003: 77 (in engine harness, under ecu box) (near engine control module, in protective case) junction connector 3 +b1 +bm Accel position sensor (behind left center of dash) At4 Batt C10 C15 Cancel Ccs Combination switch Computer data lines system Cruise Cruise control switch D position switch (park/neutral position switch) Driver side j/b (at left kick panel) Driver side j/b ecu (at left kick panel) E9 (in engine harness, under engine room 1 j/b) Ec (at left radiator side support) Efi 1 fuse 30a Efi main relay Egn- Eng+ Eng- Engine control module (on left front of engine compt, in protective case) Engine room r/b 1 (on left front of engine compartment, behind headlight) Ep1 Ep2 Epa Eptk Etcs fuse 10a F16 Fr ig fuse 7.5a Hot at all times Hot in on or start Ign fuse 7.5a Igsw J1 junction connector 1 & 2 (near engine control module, in protective case) Junction connector 1 & 2 (near engine control module, in protective case) Junction connector 7 (below engine room 1 j/b & engine room 1 r/b) Mpx1 Mpx2 Mrel Neo Nssd Obd fuse 7.5a Passenger side j/b (at right kick panel) Pnk Red Res/ acc S10 S11 S12 S13 S2 short connector Set/ coast Shift lock control ecu (below shift lever, in center console) Sil Skid control ecu (behind left side of dash) Sp1 St1- Stop fuse 5a Stoplight switch (above brake pedal, on bracket) Stp Stpi Stpo Trc+ Trc- Vcp1 Vcp2 Vcpa Vpa Vpa1 Vpa2 Vptk Wfse Cruise Control Wiring Diagram, without Dynamic Laser Controls (2 of 2) for Lexus LS 430 2003 List of elements for Cruise Control Wiring Diagram, without Dynamic Laser Controls (2 of 2) for Lexus LS 430 2003: 57 (below left side of dash) data link connector (dlc) 3 (on right side of cylinder head) Bat Combination meter Computer data lines system Cpu Cruise ind Dome fuse 10a Driver side j/b (at left kick panel) E01 E02 E03 E13 E16 E19 Ef (on left side of cylinder head) Engine control module (on left front of engine compt, in protective case) Eoil Eta F15 Gauge fuse 7.5a Ge01 Hot at all times Hot in on or start Ih (at right side of shift lever) Ii (at right side of shift lever) J16 J17 Junction connector 10 (behind upper center of dash) Junction connector 12 (behind upper center of dash) Junction connector 13 (behind upper center of dash) Junction connector 16 & 17 (behind upper center of dash) Junction connector 3 & 4 (near engine control module, in protective case) Junction connector 5 (near engine control module, in protective case) Me01 Mpx-b2 fuse 7.5a Oil Passenger side j/b (at right kick panel) Red Shielded Sil Sln+ Sln- Slt+ Slt- Slu+ Slu- Sp2+ Sp2- Speedometer Throttle control motor (on front of engine, on throttle body) Throttle position sensor (on throttle body) Transmissions system Vehicle speed sensor (on transmission) Vta Vta2 Wfse
DEFOGGERS Heated Mirrors Wiring Diagram for Lexus LS 430 2003 List of elements for Heated Mirrors Wiring Diagram for Lexus LS 430 2003: 40 & 13 (behind upper center of dash) (forward of left rear fenderwell) (forward of right rear fenderwell) Bdr Computer data lines system Cpub D door fuse 25a D25 Driver door ecu (inside front of left front door) Driver side j/b (at left kick panel) F11 F17 Front passenger door ecu (inside right front door) G10 Gnd Hot at all times Hot in on or start Htr+ Htr- I15 J/c 10 & 11 (behind upper center of dash) J/c 12 J/c 21 J/c 27 J10 J11 J12 f J13 Left outside rear view mirror Mirror heater Mpx-b1 fuse 7.5a Mpx-ig fuse 7.5a Mpx1 Mpx2 Nca P door fuse 25a Passenger side j/b (at right kick panel) Red Right outside rear view mirror Sig Rear Defogger Wiring Diagram for Lexus LS 430 2003 List of elements for Rear Defogger Wiring Diagram for Lexus LS 430 2003: 19 A/c control assembly (behind right side of dash) A11 C13 Defog fuse 40a Defog relay Driver side j/b (at left kick panel) Engine room 2 r/b (on left front of engine compartment, behind headlight) Engine room r/b 1 (on left front of engine compt, behind headlight) Fr ig fuse 7.5a Fusible link block (on right rear of engine compt) Hot at all times Hot in on or start Ig (at left side of dash) J/c 1 (near engine control module, in protective case) J/c 27 (forward of right rear fenderwell) Noise filter (rear window defogger) (behind left headlight) Rdfgr Rear window defogger Red
ELECTRONIC POWER STEERING Electronic Power Steering Wiring Diagram for Lexus LS 430 2003 List of elements for Electronic Power Steering Wiring Diagram for Lexus LS 430 2003: 45 +bi +bo Abs-ig fuse 7.5a Bat C j12 Combination meter D/g Data link connector 3 (below left side of dash) Driver side j/b (at left kick panel) E10 Eb (under fusible link block) Ec (at left radiator side support) Ess Gnd1 Gnd2 Gnd3 Gnd4 Hot at all times Hot in on or start Ig (at left side of dash) Ig1 J13 c J16 b J17 J17 d Junction connector 12 & 13 (behind upper center of dash) Junction connector 16 & 17 (behind upper center of dash) Mpx-b2 fuse 7.5a Mxp1 Passenger side j/b (at right kick panel) Pnk Pps solenoid (on left front of engine compt) S10 S11 S12 S13 Sil Skid control ecu (behind left side of dash) Sol+ Sol- Sp1 Ss1+ Ss1- Steering sensor (inside top of steering column) Trig
ELECTRONIC SUSPENSION Electronic Suspension Wiring Diagram (1 of 2) for Lexus LS 430 2003 List of elements for Electronic Suspension Wiring Diagram (1 of 2) for Lexus LS 430 2003: 99 (behind right side of dash) air suspension ecu (inside left front fenderwell, attached to suspension control arm) (inside right front fenderwell, attached to suspension control arm) (on left front of engine compt, in protective case) (on left side of engine compt) (on right side of engine compt) (under fusible link block) eb A j17 A20 A21 A22 Acceleration sensor (on left side of luggage compartment, behind left rear fenderwell) Airsus fuse 20a Chs+ Chs- Computer data lines system Driver side j/b (at left kick panel) E j16 Ec (at left radiator side support) Engine control module Erl Err Ess Fal+ Fal- Far+ Far- Fbl+ Fbl- Fbr+ Fbr- Fro Ggnd Gl1 Gnd Height control sensor (left front) Height control sensor (rear) (under center rear of vehicle) Height control sensor (right front) Hot in on or start Hsw Ig (at left side of dash) J/c 16 & 17 (behind upper center of dash) J/c 18 (behind upper right side of dash) J/c 27 (forward of right rear fenderwell) J/c 28 & 29 (rearward of right rear fenderwell) J28 J29 Mpx1 Mpx2 Pnk Ral+ Ral- Rar+ Rar- Rbl+ Rbl- Rbr+ Rbr- Red Rm+ Rm- Sbl1 Sbl2 Sbl3 Sbr1 Sbr2 Sbr3 Sgfl Sgfr Sgl2 Sgl3 Sgr1 Sgr2 Sgr3 Sgrr Shb Shf2 Shfl Shfr Shg Shr2 Shrl Shrr Sil Slex Slfl Slfr Slrl Slrr Ss2+ Ss2- Steering sensor (inside top of steering column) Suspension control actuator (left front) Suspension control actuator (left rear) (near base of left "c" pillar) Suspension control actuator (right front) Suspension control actuator (right rear) (near base of right "c" pillar) Sw1 Tach Vgs Electronic Suspension Wiring Diagram (2 of 2) for Lexus LS 430 2003 List of elements for Electronic Suspension Wiring Diagram (2 of 2) for Lexus LS 430 2003: 52 (at right side of dash) ik (behind left side of dash) (behind right side of dash) (on right front of engine compt) Absorber control switch Air sus fuse 40a Air sus relay C15 Chs+ Chs- Combination meter Computer data lines system Data link connector (dlc) 3 (below left side of dash) Ea (at right radiator side support) Eb (under fusible link block) Fro Front height control valve (on right front of engine compt) Fusible link block (on right rear of engine compartment) Headlight beam level control ecu Height control compressor Height control exhaust valve Height control switch Hot at all times Ii (at right side of shift lever) Ik (at right side of dash) Ind light Interior lights system J/c 12 & 13 (behind upper center j13 J/c 23 (rearward of left rear fenderwell) J12 Lh+ Luggage room j/b (on left side of luggage compt) Mpx1 Mpx2 Of dash) Opb Passenger side j/b (at right kick panel) Pnk Rear height control valve (near front of engine compt) Rh+ Rm+ Rm- S11 S12 Sbf Sgf Shfl Short connector (height control) Shrl Sil Skid control ecu Tems sport
ENGINE PERFORMANCE
4.3L 4.3L, Engine Performance Wiring Diagram (1 of 6) for Lexus LS 430 2003 List of elements for 4.3L, Engine Performance Wiring Diagram (1 of 6) for Lexus LS 430 2003: 81 (at left kick panel) driver side j/b (behind upper center of dash) (right side of shift lever) +b1 +bm A/c system A20 Accelerator position sensor (behind left center of dash) Acmg Air suspension ecu (behind right side of dash) Anti-theft system (transponder key computer) Batt C12 C15 Combination meter Computer data lines system Cooling fans system Cpu Distance control ecu (behind right side of dash) Ec (left radiator side support) Elc Eng+ Eng- Engine control module (ecm) (on left front of engine compt, in protective case) Ep1 Ep2 Epa Eptk Etam Fpr Htl2 Htr2 Igsw Imi Imo J/c 10 J/c 12 J/c 13 (behind upper center of dash) J/c 16, j/c 17 J/c 16, j/c 17 (behind upper center of dash) J16 J17 Lcs Mil ind Mpx1 Mpx2 Mrel Neo Oxl2 Oxr2 Pnk Ptnk Pwr Red Rfc S10 trc+ S11 sp1 S12 mpx2 S13 Short connector s1, s2 Sil Skid control ecu (behind left side of dash) Snow Speedo- meter Sta Stp Tach Tam Tbp Trc+ Trc- Vapor pressure sensor (below right rear of vehicle) Vcc Vcp1 Vcp2 Vcpa Vpa Vpa1 Vpa2 Vptk Wfse 4.3L, Engine Performance Wiring Diagram (2 of 6) for Lexus LS 430 2003 List of elements for 4.3L, Engine Performance Wiring Diagram (2 of 6) for Lexus LS 430 2003: 31 C/ opn relay Data link connector 3 (below left side of dash) Dome fuse 10a Driver side j/b (at left kick panel) Driver side j/b ecu (at left kick panel) E13 E16 E9 (engine harn, near engine room j/b 1) Ec (left radiator side support) Efi 1 fuse 30a Efi main relay Engine room r/b 1 (on left front of engine compt, behind headlight) Etcs fuse 10a F/ pmp relay Fuel pump & fuel sender (under left rear of vehicle) Fuel pump resistor (on left side of engine compt) Gauge fuse 7.5a Hot at all times Hot in on or start J/c 1, j/c 2 (near ecm, in protective case) J/c 23 (rearward of left rear fender- well) J/c 7 (below engine room j/b 1) Mpx-b2 fuse 7.5a Passenger side j/b (at right kick panel) Red Sil Stpi Stpo Tac Vsv (pressure switching valve) (below right rear of vehicle) Wfse 4.3L, Engine Performance Wiring Diagram (3 of 6) for Lexus LS 430 2003 List of elements for 4.3L, Engine Performance Wiring Diagram (3 of 6) for Lexus LS 430 2003: 50 (at left kick panel) driver side j/b (below engine room j/b 1) j/c 7 (engine harn, under ecu box) (generator) charging system (on right side of transmission) park/neutral position switch Acc Braided C14 E10 (engine harn, near front of battery) Ee (side of right cyl head) Efi 2 fuse 7.5a Eknl Engine control module (ecm) (on left front of engine compt, in protective case) Engine room r/b 1 (on left front of engine compt, behind headlight) Eoil Eol1 F14 Fr ig fuse 7.5a Fusible link block (on right rear of engine compt) Hot at all times Hot in on or start Htl Ign fuse 7.5a Ignition switch Knkl Knkr Left knock sensor (on left side of engine) Lock Mol Nco+ Nco- O/d direct clutch speed sensor (on left side of transmission) Oil Oxl1 P/n Red Right knock sensor (on right side of engine) Sln+ Sln- Slt+ Slt- Slu+ Slu- Sp2+ Sp2- Sta fuse 7.5a Start Starter Starter relay Vehicle speed sensor (on transmission) 4.3L, Engine Performance Wiring Diagram (4 of 6) for Lexus LS 430 2003 List of elements for 4.3L, Engine Performance Wiring Diagram (4 of 6) for Lexus LS 430 2003: 26 (above brake pedal, on bracket) stoplight switch (at right kick panel) passenger side j/b (below shift lever, in center console) shift lock control ecu (on left center of engine) engine oil level sensor (on right side of transmission) a/t indicator light switch (integral to park/neutral position switch) At4 Atl C10 C16 Driver side j/b Driver side j/b (at left kick panel) Ef (side of left cyl head) Electronically controlled transmission solenoid (on left side of transmission) Hot at all times J/c 3, j/c 4 (near ecm, in protective case) J/c 8 (behind left end of dash) Nssd Nssl Red Sln+ Sln- Slt+ Slt- Slu+ Slu- Stop fuse 5a 4.3L, Engine Performance Wiring Diagram (5 of 6) for Lexus LS 430 2003 List of elements for 4.3L, Engine Performance Wiring Diagram (5 of 6) for Lexus LS 430 2003: 42 (at right kick panel) passenger side j/b ecu (dash harn, behind left side of instru- ment cluster) (engine harn, e12 (engine harn, rear top of left cyl head) (near ecm, in protective case) j/c 5, j/c 6 (right front of engine) right bank noise filter (ignition) Center rear top of engine Computer data lines system E12 E13 E2g Ef (side of left cyl head) Electronically controlled transmission pattern select switch Engine coolant temperature sensor (on front center of engine) Engine room r/b 1 (on left front of engine compt, behind head- light) Fuel inj 1 Fuel inj 2 Fuel inj 3 Fuel inj 4 Fuel inj 5 Fuel inj 6 Fuel inj 7 Fuel inj 8 Heated oxygen sensor (bank 1 sensor 1) (on exhaust system, on left side of engine) Heated oxygen sensor (bank 1 sensor 2) (on exhaust system, below vehicle) Heated oxygen sensor (bank 2 sensor 1) (on exhaust system, on right side of engine) Heated oxygen sensor (bank 2 sensor 2) (on exhaust system, below vehicle) Hot in on or start Htl Htr Ik (right side of firewall) Inj fuse 10a Mass airflow meter (right side of engine compt, near air box) Mpx- Ox2 Pwr Red Snow Tha Vsv (acis) (on right rear of engine) Vsv (canister closed valve) (on right side of engine compt) Vsv (evap) (on left rear of engine) 4.3L, Engine Performance Wiring Diagram (6 of 6) for Lexus LS 430 2003 List of elements for 4.3L, Engine Performance Wiring Diagram (6 of 6) for Lexus LS 430 2003: 79 (engine harn, center top of right cyl head) (engine harn, center top rear of engine) (engine harn, rear top of left cyl head) (left rear of engine) left bank noise filter (ignition) (near ecm, in protective case) j/c 5, j/c 6 A/c system Acis Braided Camshaft position sensor (on front of left cyl head) Ccv Crankshaft position sensor (on left front of engine) E01 E02 E03 E11 E12 E13 Ee (side of right cyl head) Ef (side of left cyl head) Eg2 Ene Engine control module (ecm) (on left front of engine compt, in protective case) Eor1 Eta Etha Ethw Evg Evvl Evvr G2- Ge01 Htr If1l If1r If2l If2r Ignition coil & igniter 1 Ignition coil & igniter 2 Ignition coil & igniter 3 Ignition coil & igniter 4 Ignition coil & igniter 5 Ignition coil & igniter 6 Ignition coil & igniter 7 Ignition coil & igniter 8 Igt1 Igt2 Igt3 Igt4 Igt5 Igt6 Igt7 Igt8 Lcki Left camshaft timing oil control valve (on front of left cyl head) Left vvt sensor (on left side of engine) Me01 Mops Ne+ Ne- Ocr+ Ocr- Ocv+ Ocv- Oil pressure switch (on lower left front of engine) Oxr1 Prg Red Right camshaft timing oil control valve (on front of right cyl head) Right vvt sensor (on right side of engine) Tha Throttle control motor (on front of of engine, on throttle body) Throttle position sensor (on throttle body) Thw Vta Vta2 Vvl+ Vvl- Vvr+ Vvr-
EXTERIOR LIGHTS Back-up Lamps Wiring Diagram for Lexus LS 430 2003 List of elements for Back-up Lamps Wiring Diagram for Lexus LS 430 2003: 36 (behind left end of dash) gateway ecu A/c control assembly (behind right side of dash) A11 Back-up light Back-up light switch (park/neutral position switch) Bck1 Bk/up Bm (at left rear quarterpanel) Center cluster integration panel Engine control module (on left front of engine compt, in protective case) Engine room 1 r/b (on left front of engine compt, behind headlight) Fr ig fuse 7.5a Fusible link block (on right rear of engine compt) Hot at all times Hot in on or start J/c 1 & 2 (in protective case) J/c 23 (rearward of left rear fenderwell) J/c 24 & 25 (on left rear of luggage compt lid) J24 J25 L12 L14 Left rear combination light Lug j/b fuse 50a Luggage room j/b (on left side of luggage compartment) Luggage room j/b ecu Mpi1 Mpl1 Mpx+ Mpx- Mpx2 P-gnd Red Right rear combination light W/ navigation W/o navigation Exterior Lamps Wiring Diagram (1 of 2) for Lexus LS 430 2003 List of elements for Exterior Lamps Wiring Diagram (1 of 2) for Lexus LS 430 2003: 64 (at right side of shift lever) Bubs C12 Combination meter Cpu Dome fuse 10a Driver side j/b (at left kick panel) E13 E16 F15 Fusible link block (on right rear of engine compt) Gateway ecu (behind left end of dash) Gauge fuse 7.5a High mounted stop light Hot at all times Hot in on or start J/c 10 (behind upper center of dash) J/c 12 (behind upper center of dash) J/c 16 & 17 (behind upper center of dash) J/c 23 (rearward of left rear fenderwell) J/c 24 & 25 (on left rear of luggage compt lid) J16 J17 J24 J24 c J24 f J25 J25 b L12 L13 L14 Lce lp fuse 7.5a Lce1 Left license plate light Left rear combination light Lug j/b fuse 50a Luggage room j/b (on left side of luggage compartment) Luggage room j/b ecu Mpi2 Mpl1 Mpx+ Mpx- Mpx-b2 fuse 7.5a P-gnd Passenger side j/b (at right kick panel) Red Right license plate light Right rear combination light Stop light Stop1 Stop2 Stp1 Stp2 Stp3 Tail ind (canada) Tail lights Tail1 Tail2 Til1 Til2 Til3 Til4 Turn signal light Turn signal light Exterior Lamps Wiring Diagram (2 of 2) for Lexus LS 430 2003 List of elements for Exterior Lamps Wiring Diagram (2 of 2) for Lexus LS 430 2003: 56 (at left side of dash) ig (w/ navigation) (w/o navigation) Bu+ Bu- C12 C14 Combination meter Combination switch Cral Crar Driver side j/b (at left kick panel) Driver side j/b ecu E13 E18 Ea (at right radiator side support) Ec (at left radiator side support) Engine room 1 r/b (on left front of engine compt, behind headlight) Engine room 2 r/b (on left front of engine compt, behind headlight) F11 Front controller Ftal Haz Haz fuse 15a Hazard switch Hot at all times Hot in on or start Ih (at right side of shift lever) Ii (at right side of shift lever) J/c 13 (behind upper center of dash) J/c 14 & 15 (behind upper center of dash) J14 J15 Left front parking light Left front side marker light Left front turn signal light Left signal ind Mpx-b3 fuse 7.5a Mpx-ig fuse 7.5a Mpx1 Mpx2 Passenger side j/b (at right kick panel) Power tilt & power telescopic ecu (behind left side of dash) Red Right front parking light Right front side marker light Right front turn signal light Right turn signal ind Sidl Sidr Tail fuse 7.5a Turn lh Turn rh Tx1 W/ compass W/o compass
GROUND DISTRIBUTION Ground Distribution Wiring Diagram (1 of 5) for Lexus LS 430 2003 List of elements for Ground Distribution Wiring Diagram (1 of 5) for Lexus LS 430 2003: 54 (on left front of engine compartment, behind headlight) engine room 1 r/b (on left rear of engine compartment) engine room 3 r/b (on right rear of engine compartment) fusible link block Abs & & trac & vsc actuator Abs motor relay Blower motor Brake fluid level warning switch Cooling fan ecu E1 (engine harn, left front of engine compt, near protective case) E4 (engine harn, behind right headlight) E5 (engine harn, right side of engine compt) E6 (engine harn, behind left headlight) Ea (right radiator side support) Eb (under fusible link block) Ec (left radiator side support) Ed (left firewall, top side) Efi main relay Engine control module Engine hood courtesy switch Exhaust gas sensor Fan relay Front height control valve Front wiper motor Gnd1 Gnd2 Gnd3 Gnd4 Headlight cleaner control relay Headlight cleaner motor Height control compressor Height control exhaust valve Ig1 relay Ig2 relay J/c 3 (near engine control module in protective case) J/c 7 (below engine room 1 j/b & engine room 1 r/b) Left front fog light Left front parking light Left front side marker light Left front suspension control actuator Left front turn signal light Left headlight (high beam) Left headlight control ecu Right front fog light Right front parking light Right front side marker light Right front suspension control actuator Right front turn signal light Right headlight (high beam) Right headlight control ecu S10 S13 Skid control ecu Washer level sensor Washer motor Ground Distribution Wiring Diagram (2 of 5) for Lexus LS 430 2003 List of elements for Ground Distribution Wiring Diagram (2 of 5) for Lexus LS 430 2003: 69 (dash harn, behind top right of dash) i6 (on left front of engine compt, behind headlight) engine room 2 r/b A/c magnetic clutch & lock sensor A24 Airbag sensor assembly C12 C13 Combination meter Combination switch D-acc relay D-ig1 relay Data link connector 3 Defog relay Distance control ecu Driver side j/b (at left kick panel) Driver side j/b ecu E12 E12 (engine harn, top rear of engine) E13 E13 (engine harn, top left side of engine) E19 E20 Ee (side of right cylinder head) Ef (side of left cylinder head) Engine control module Engine oil level sensor Eo1 Eo2 Eo3 Front controller Fuel lid opener switch Gateway ecu Gnd Heated oxygen sensor (bank 1 sensor 1) Heated oxygen sensor (bank 1 sensor 2) Heated oxygen sensor (bank 2 sensor 1) Heated oxygen sensor (bank 2 sensor 2) Ig (left side of dash) Ignition coil & ignitor 1 Ignition coil & ignitor 2 Ignition coil & ignitor 3 Ignition coil & ignitor 4 Ignition coil & ignitor 5 Ignition coil & ignitor 6 Ignition coil & ignitor 7 Ignition coil & ignitor 8 Ih (right side of shift lever) Ij (right dash brace) J/c 3, j/c 4 (near engine control module in protective case) J/c 5, j/c 6 (near engine control module in protective case) J/c 8 (behind left end of dash) Laser radar sensor Luggage compartment door opener switch Me01 Multi- display Outer mirror switch Park/ neutral position switch Power tilt & power telescopic ecu Radio & player Rheostat Sgnd Sln- Steering sensor T15 Telephone transceiver & speaker relay Theft deterrent ecu Transponder key computer Un- Unlock warning switch Ground Distribution Wiring Diagram (3 of 5) for Lexus LS 430 2003 List of elements for Ground Distribution Wiring Diagram (3 of 5) for Lexus LS 430 2003: 50 (on right rear of engine compt) fusible link block A/c control assembly A11 A24 A35 Absorber control switch Air sus relay Airbag sensor assembly B w/o navigation B1 (roof harn, right front of roof) C12 C15 Central cluster integration panel Clock Combination meter Console box illumination Door lock control receiver (inner mirror) E14 Electronically controlled transmission pattern select switch F15 Front cigarette lighter Glove box light 1 Glove box light 2 Gnd Gnd3 Hazard switch Headlight beam level control ecu Height control switch I4 (dash harn, behind center of dash) I6 (dash harn, behind top right of dash) Ii (right side of shift lever) Ik (right dash side panel) Left rear interior light Left vanity light Moon roof control ecu Overhead j/b P-acc relay P-ig1 relay Passenger side j/b (at right kick panel) Passenger side j/b ecu Power outlet Right front buckle switch Right rear interior light Right vanity light Shift lock control ecu Short connector (height control) T15 Telephone transceiver & speaker relay Traction control switch, left seat heater switch, right seat heater switch, left climate control seat switch, right climate control seat switch, headlight cleaner switch, rear sunshade switch, rear seat reset switch W/ navigation a Ground Distribution Wiring Diagram (4 of 5) for Lexus LS 430 2003 List of elements for Ground Distribution Wiring Diagram (4 of 5) for Lexus LS 430 2003: 56 (seat harn, under driver's seat) b5 A35 Audio & rear a/c control switch B6 (seat harn, under driver's seat) B8 (seat harn, in left rear seat back) Bp (left rear passenger seat back) Clearance sonar ecu Climate control seat ecu (driver's seat) D25 D27 D28 Door lock switch (luggage) Driver door ecu Driver seat ecu Fuel lid opener motor Fuel pump Gnd High mounted stop light J/c 21 (forward of left rear fenderwell) J/c 23 (rearward of left rear fenderwell) J/c 24, j/c 25 (on left rear of luggage compt) J/c 31 (behind left rear seat back) L14 Left front buckle switch Left front seat heater Left rear buckle switch Left rear combin- ation light Left rear door ecu Left rear head rest limit switch Left rear seat ecu Left rear seat heater Left rear suspension control actuator Left vibration seat ecu Luggage compartment door closer motor Luggage compartment door key unlock switch Luggage room j/b (on left side of luggage compt) Luggage room j/b ecu Noise filter Power seat control switch (driver's seat cushion) Power seat control switch (driver's seat lumbar support) Power seat motor & position sensor (rear passenger's left seat head rest top & bottom control) Power seat position sensor (driver's seat cushion control) Power seat position sensor (driver's seat front vertical control) Power seat position sensor (driver's seat head rest control) Power seat position sensor (driver's seat reclining control) Power seat position sensor (driver's seat seat lifter control) Power seat position sensor (driver's seat slide control) Power seat position sensor (rear passenger's left seat slide control) R13 Rear a/c unit Rear height control valve Rear seat control switch Rear sunshade control relay Right rear combin- ation light Sgnd W/ rear power seat Ground Distribution Wiring Diagram (5 of 5) for Lexus LS 430 2003 List of elements for Ground Distribution Wiring Diagram (5 of 5) for Lexus LS 430 2003: 49 A22 A35 Air suspension ecu Audio & rear a/c control switch B10 B11 B11 (seat harn, in right rear seat back) B3 (body harn, right front luggage compt) B7 (seat harn, under passenger's seat) Bq (right rear passenger seat back) Climate control seat ecu (front passenger's seat) F17 Front passenger door ecu Gnd Ill- Ir (under front passenger's seat) J/c 27 (forward of right rear fenderwell) J/c 28, j/c 29 (rearward of right rear fenderwell) J/c 30 (rearward of right rear fenderwell) Left rear seat heater Navigation ecu Power seat control switch (front passenger's seat lumbar support) Power seat control switch (front passenger's seat) Power seat motor & position sensor (right rear passenger's seat & head rest top & bottom control) Power seat position sensor (right rear passenger's seat slide control) R14 R23 Rear cigarette lighter Rear window defogger Right front seat heater Right rear buckle switch Right rear door ecu Right rear head rest limit switch Right rear pad wear indicator switch (right rear abs speed sensor) Right rear seat ecu Right rear seat heater Right rear suspension control actuator Right vibration seat ecu S30 Sel1 Sel2 Sgnd Stereo component amplifier Stereo component tuner T15 Telephone transceiver & speaker relay W/ rear power seat W/o rear power seat W/rear power seat
HEADLIGHTS Headlamps Wiring Diagram (1 of 2) for Lexus LS 430 2003 List of elements for Headlamps Wiring Diagram (1 of 2) for Lexus LS 430 2003: 59 (at left radiator side support) ec Automatic light control sensor (behind upper center of dash) Brake fluid level warning switch (on brake master cylinder reservoir) Bu+ Bu- Bubs Cltb Clte Clts Combination switch Computer data lines system Cty D25 Data Door lock control receiver Driver door ecu (inside front of left front door) Driver side j/b (at left kick panel) Driver side j/b ecu E14 F11 Gnd Head Hot at all times Hot in run or start Hrly I14 Ig (at left side of dash) Ii (at right side of shift lever) J14 Junction connector (behind upper center of dash) Junction connector 14 & 15 (behind j15 upper center of dash) Junction connector 7 (below engine room 1 j/b & engine room 1 r/b) L14 Lbl Left front door courtesy switch Luggage room j/b ecu (on left side of luggage compartment) Mpx+ Mpx- Mpx-b Mpx-b3 fuse 7.5a Mpx-ig Mpx-ig fuse 7.5a Mpx1 Mpx2 Parking brake switch (behind left end of dash, on parking brake mechanism) Passenger side j/b (at right kick panel) Pkb Power tilt & power telescopic ecu (behind left side of dash) Rco Rda Red Rssi S10 S11 S12 Skid control ecu (behind left side of dash) Theft deterrent ecu (behind upper right center of dash) Transponder key computer (behind upper center of dash) Tx1 Headlamps Wiring Diagram (2 of 2) for Lexus LS 430 2003 List of elements for Headlamps Wiring Diagram (2 of 2) for Lexus LS 430 2003: 58 (on left front of engine compt, behind headlight) Combination meter Computer data lines system Cpu Dome fuse 10a Driver side j/b (at left kick panel) E10 E13 E16 Ea (at right radiator side support) Ec (at left radiator side support) Engine room 1 j/b (on left front of engine compt, behind headlight) Engine room 1 r/b Engine room 2 r/b (on left front of engine compt, behind headlight) F15 Ffog Fhhl Fogl Fogr Fr fog fuse 15a Front controller Front fog ind Gateway ecu (behind left end of dash) Gauge fuse 7.5a H-lp hi fuse 20a H-lp l lwr fuse 15a H-lp r lwr fuse 15a Head ind (usa) Head lp relay High beam ind Hlhl Hlhr Hot at all times Hot in on or start Ih (at right side of shift lever) Ii (at right side of shift lever) J16 J17 Junction connector (behind upper center of dash) Junction connector 16 & 17 (behind upper center of dash) Left front fog light Left headlight control ecu Left high beam headlight Main fusible link Mpd1 Mpd2 Mpi1 Mpi2 Mpl1 Mpl2 Mpx-b2 fuse 7.5a Mpx1 Mpx2 Passenger side j/b (at right kick panel) Red Right front fog light Right headlight control ecu Right high beam headlight Headlamps Leveling Wiring Diagram, with Air Suspension for Lexus LS 430 2003 List of elements for Headlamps Leveling Wiring Diagram, with Air Suspension for Lexus LS 430 2003: 92 A20 A21 Air suspension ecu (behind right side of dash) Altl C17 Chg- Combination meter Combination switch Computer data lines system Cpu Dome fuse 10a Driver side j/b (at left kick panel) Driver side j/b ecu (at left kick panel) E10 E13 E16 Engine room 2 r/b (on left front of engine compt, behind headlight) F15 Flo Fro2 Front controller Gateway ecu (behind left end of dash) Gauge fuse 7.5a H-lp lvl fuse 5a Hdlv Head Headlight beam level control ecu (behind right side of dash) Hot at all times Hot in on or start Hot in run or start Ig (at left side of dash) Ii (at right side of shift lever) Ik (at right side of dash) J16 J17 Junction connector (behind upper center of dash) Junction connector 16 & 17 (behind upper center of dash) Left front height control sensor (inside left front wheelwell, attached to suspension control arm) Left headlight beam level control actuator (behind left headlight) Lh+ Lh- Lh1 Lh2 Lh3 Lh4 Lhb Lhe Lhg Lht Mpi2 Mpl2 Mpx-b2 fuse 7.5a Mpx1 Mpx2 Multi- display Passenger side j/b (at right kick panel) Passenger side j/b ecu (at right kick panel) Pnk Rear height control sensor (under center rear of vehicle) Red Rh+ Rh- Rh1 Rh2 Rh3 Rh4 Rhb Rhe Rhg Rht Right headlight beam level control actuator (behind right headlight) S10 S12 S13 Sbf Sbl1 Sbl2 Sbl3 Sgf Sgl1 Sgl2 Sgl3 Shb Shf2 Shfl Shg Shr2 Shrl Skid control ecu (behind left side of dash) Spdl Spdr Wng Headlamps Leveling Wiring Diagram, without Air Suspension for Lexus LS 430 2003 List of elements for Headlamps Leveling Wiring Diagram, without Air Suspension for Lexus LS 430 2003: 83 (at right side of dash) Altl C17 Chg- Combination meter Combination switch Computer data lines system Cpu Dome fuse 10a Driver side j/b (at left kick panel) Driver side j/b ecu (at left kick panel) E10 E13 E16 Engine room 2 r/b (on left front of engine compt, behind headlight) F15 Flo Fro2 Front controller Gateway ecu (behind left end of dash) Gauge fuse 7.5a H-lp lvl fuse 5a Hdlv Head Headlight beam level control ecu (behind right side of dash) Hot at all times Hot in on or start Hot in run or start Ig (at left side of dash) Ii (at right side of shift lever) J16 J17 Junction connector (behind a upper right side of dash) Junction connector (behind upper center of dash) Junction connector (behind upper right side of dash) Junction connector 16 & 17 (behind upper center of dash) Left front height control sensor (inside left front wheelwell, attached to suspension control arm) Left headlight beam level control actuator (behind left headlight) Lh+ Lh- Lh1 Lh2 Lh3 Lh4 Lhb Lhe Lhg Lht Mpi2 Mpl2 Mpx-b2 fuse 7.5a Mpx1 Mpx2 Multi- display Passenger side j/b (at right kick panel) Passenger side j/b ecu (at right kick panel) Pnk Rear height control sensor (under center rear of vehicle) Red Rh+ Rh- Rh1 Rh2 Rh3 Rh4 Rhb Rhe Rhg Rht Right headlight beam level control actuator (behind right headlight) S10 S12 S13 Sbf Sgf Shb Shfl Shg Shrl Skid control ecu (behind left side of dash) Spdl Spdr Wng
HORN Horn Wiring Diagram for Lexus LS 430 2003 List of elements for Horn Wiring Diagram for Lexus LS 430 2003: 19 Driver side j/b (at left kick panel) Driver side j/b ecu (at left kick panel) Engine room 1 r/b (on left front of engine compt, behind headlight) Engine room 2 r/b (on left front of engine compt, behind headlight) F15 Fhor Front controller Horh Horl Horn (high) Horn (low) Horn fuse 10a Horn switch (combination switch) Hot at all times Mpx Mpx1 Mpx2 Mpx3 Security fuse 7.5a
INSTRUMENT CLUSTER
INTERIOR LIGHTS Courtesy Lamps Wiring Diagram (1 of 2) for Lexus LS 430 2003 List of elements for Courtesy Lamps Wiring Diagram (1 of 2) for Lexus LS 430 2003: 66 (at right side of dash) ik (at right side of shift lever) (at right side of shift lever) ii (behind upper center of dash) j/c 12 (in body harness, above center of right front door) (in body harness, at right side of windshield header) b1 +b1 +b2 A/c control assembly (behind right side of dash) A11 Air bag sensor assembly (behind lower center of dash) Airbag C12 Center cluster integration panel Combination meter Cspt Cty Dome fuse 10a Door Door ind Driver side j/b (at left kick panel) E13 E16 Engine control module (on left front of engine compt) F13 F15 Fspt Gauge fuse 7.5a Gnd Gnd1 Gnd3 Hot at all times Hot in on or start Ignition key cylinder light (transponder key amplifer) Ih (at right side of shift lever) Ii (at right side of shift lever) Ile J/c 10 & 11 (behind upper center of dash) J/c 16 & 17 (behind upper center of dash) J10 J11 J16 c J17 c Lcty Led Left rear interior light Left step light Left vanity light Mpx+ Mpx- Mpx-b Mpx-b2 fuse 7.5a Mpx1 Mpx2 Overhead j/b (at front of roof opening) Passenger side j/b (at right kick panel) Passenger side j/b ecu (at right kick panel) Rcty Red Right rear interior light Right step light Right vanity light Security fuse 7.5a Skid control ecu (behind left side of dash) W/ nav W/o nav Courtesy Lamps Wiring Diagram (2 of 2) for Lexus LS 430 2003 List of elements for Courtesy Lamps Wiring Diagram (2 of 2) for Lexus LS 430 2003: 68 (rearward of left rear fenderwell) j/c 23 Bdcy Bdr Cty Ctyb Cyl D door fuse 25a D25 Data Door lock control receiver (inner mirror) Door rr lh fuse 20a Door rr rh fuse 20a Driver door ecu (inside front of left front door) Driver side j/b (at left kick panel) E11 F17 Front passenger door ecu (inside right front door) G10 Gateway ecu (behind left end of dash) Gnd Hot at all times Htr- I14 J/c 21 (forward of left rear fenderwell) J/c 27 (forward of right rear fender- well) J10 L12 L14 Left front door courtesy light Left front door courtesy switch Left outer rear view mirror Left rear door courtesy light Left rear door courtesy switch Left rear door ecu (inside left rear door) Lgcy Lglp Luggage compartment light 1 Luggage compartment light 2 Luggage door lock switch Luggage room j/b (on left side of luggage compt) Luggage room j/b ecu (on left side of luggage compt) Mpd1 Mpd2 Mpi1 Mpi2 Mpl1 Mpx- Mpx1 Mpx2 Nca P door fuse 25a P-gnd Passenger side j/b (at right kick panel) R13 R14 Rc0 Rda Red Right front door courtesy light Right front door courtesy switch Right outer rear view mirror Right rear door courtesy light Right rear door courtesy switch Right rear door ecu (inside right rear door) Rr ecu-b fuse 7.5a Rssi Theft deterrent ecu (behind upper center of dash) Transponder key computer (behind upper center of dash) Instrument Illumination Wiring Diagram (1 of 2) for Lexus LS 430 2003 List of elements for Instrument Illumination Wiring Diagram (1 of 2) for Lexus LS 430 2003: 74 (at left side of dash) ig Anti-theft system Ash+ Ash- Bdr C12 Clearance sonar switch (outer mirror switch) (w/park assist) Coin box illumi- nation Combination meter Combination switch Computer data lines system D door fuse 25a D24 D25 Driver door ecu (inside front of left front door) Driver side j/b (at left kick panel) Driver side j/b ecu (at left kick panel) Driving position memory switch E15 F10 F11 F16 F17 Front passenger door ecu (inside right front door) G10 Gnd Hot at all times Hot in on or start I18 J/c 14 & 15 (behind upper center of dash) J/c 13 (behind upper center of dash) J/c 21 (forward of left rear fender- well) J/c 22 (rearward of left rear fenderwell) J/c 23 (rearward of left rear fenderwall) J/c 27 (foreward of right rear fenderwell) J10 Led+ Led- Left front inside handle illumination Left rear ashtray illumination Left rear door ecu (inside left rear door) Left rear inside handle illumination Left rear seat memory switch (w/ rear power seat) Mpx-b3 fuse 7.5a Mpx-ig fuse 7.5a Mpx1 Mpx2 P door fuse 25a Panel fuse 7.5a Panel1 Panel2 Passenger side j/b (at right kick panel) R12 R13 R14 R15 Rear seat control switch (w/ rear power seat) Red Remote control mirror switch (outer mirror switch) Rheostat Right front inside handle illumination Right rear ashtray illumination Right rear door ecu (inside right rear door) Right rear inside handle illumination Rr door lh fuse 20a Rr door rh fuse 20a Seid Sw1 Sw2 Sw3 Tr+ Tr1 Tr2 Tr3 Instrument Illumination Wiring Diagram (2 of 2) for Lexus LS 430 2003 List of elements for Instrument Illumination Wiring Diagram (2 of 2) for Lexus LS 430 2003: 42 (at right kick panel) passenger side j/b (at right side of dash) ik (behind upper center of dash) j/c 12 & 13 (in dash harness, behind passenger's side air bag) i6 (in dash harness, under left front of center console) (rearward of right rear fenderwell) j/c 28 & 29 (w/o nav) (w/ nav) A j16 A/t shift lever illumination Absorber control switch (w/ electronic suspension) Audio & rear a/c control switch (w/o rear power seat) B j12 B11 Center cluster integration panel (w/o navigation) Cigarette lighter (front) Cigarette lighter (rear) Clock (w/o navigation) Console box illumination D j13 D j28 D j29 Driver's a/c room temperature switch E j17 E j28 Electronically controlled transmission pattern select switch Front passenger's a/c room temperature switch Fuel lid opener switch illumination Glove box light 1 Glove box light 2 Hazard switch Height control switch (w/ electronic suspension) I16 Ii (at right side of shift lever) J/c 16 & 17 (behind upper center of dash) J/c 27 (foreward of right rear fenderwell) J29 e Mirror switch (outer mirror switch) Multi-display (w/ navigation) Overhead j/b (w/ garage door opener) Radio & player Right rear seat memory switch (w/ rear power seat) Traction control switch, seat heater switches, climate control seat switches, headlight cleaner switch, rear sunshade switch, rear seat reset switch
MEMORY SYSTEMS Driver"s Memory Seat Wiring Diagram for Lexus LS 430 2003 List of elements for Driver"s Memory Seat Wiring Diagram for Lexus LS 430 2003: 69 (in body harness, under front of left front seat) b5 (in body harness, under rear of left front seat) C20 Climate control seat ecu (if equipped) (under right side of driver's seat) Computer data lines system Csnf Csnr D p/seat fuse 30a D24 D25 D27 D28 Down Driver door ecu (inside front of left front door) Driver seat ecu (below left side of driver's seat) Driver side j/b (at left kick panel) Driver's seat cushion position sensor Driver's seat cushion power seat motor Driver's seat front vertical position sensor Driver's seat front vertical power seat motor Driver's seat head rest power seat motor & position sensor Driver's seat lifter position sensor Driver's seat lifter power seat motor Driver's seat reclining position sensor Driver's seat reclining power seat motor Driver's seat slide position sensor Driver's seat slide power seat motor Frv+ Frv- Gnd Hot at all times Hot in on or start I14 I17 Idl J/c 10 (behind upper center of dash) J/c 21 (forward of left rear fender- well) J/c 21 (forward of left rear fenderwell) J10 Memory seat switch Mmry Mpx-b1 fuse 7.5a Mpx-ig fuse 7.5a Mpx1 Mswe O/p Passenger side j/b (at right kick panel) Pnk Power seat control switch (driver's seat cushion) Power seat control switch (driver's seat lumbar support) Power seat motor (driver's seat lumbar support lower side control) Power seat motor (driver's seat lumbar support upper side control) Pvcc Rcl+ Rcl- Red Rrv+ Rrv- Sgnd Sld+ Sld- Ssfv Ssrc Ssrh Ssrr Ssrs Ssrv Sysb Vcc Memory Mirrors Wiring Diagram for Lexus LS 430 2003 List of elements for Memory Mirrors Wiring Diagram for Lexus LS 430 2003: 78 (at right side of shift lever) ii Bdr Computer data lines system Cpub D door fuse 25a D24 D25 Data Dle Door lock control receiver (inner mirror) Driver door ecu (inside front of left front door) Driver side j/b (at left kick panel) Driver side j/b ecu Driving position memory switch Engine control module (on left front of engine compartment, in protective case) Engine controls system F11 F16 F17 Front passenger door ecu (inside right front door) G10 Gnd Hot at all times Hot in on or start Hssr I15 Ig (at left side of dash) J/c 10 & 11 (behind upper center of dash) J/c 12 & 13 (behind upper center of dash) J/c 14 & 15 (behind upper center of dash) J/c 21 (forward of left rear fenderwell) J/c 27 (forward of right rear fenderwell) J10 J11 J12 J13 J14 J15 Left front door lock control switch (power window master switch) Left outside rear view mirror Left/right motor M+r Mhr Mind Mmry Mpx-b Mpx-b1 fuse 7.5a Mpx-b3 fuse 7.5a Mpx-ig Mpx-ig fuse 7.5a Mpx1 Mpx2 Mr+ Mr- Msw Mswe Mul Mvr Outer mirror switch P door fuse 25a Passenger side j/b (at right kick panel) Pnk Pwe R/e Rco Rda Red Ret Retractable motor Right front door lock control switch Right outside rear view mirror Rssi Rtr Sensor Sig Theft deterrent ecu (behind upper right center of dash) Up/down motor Vssr Memory Power Tilt & Power Telescopic Wiring Diagram for Lexus LS 430 2003 List of elements for Memory Power Tilt & Power Telescopic Wiring Diagram for Lexus LS 430 2003: 48 (behind left end of dash) Com1 Com2 Computer data lines system D24 D25 Driver door ecu (inside front of left front door) Driver side j/b (at left kick panel) Driving position memory switch Ecub F/b1 F/b2 F11 G10 Gnd Hot at all times Hot in on or start I14 Ig (at left side of dash) Ih (at right side of shift lever) J/c 13 (behind upper center of dash) J/c 14 & 15 (behind upper center of dash) J/c 9 J14 J15 Ksw Mmry Mpx-b3 fuse 7.5a Mpx-ig fuse 7.5a Mpx1 Mpx2 Mswe Nca Passenger side j/b (at right kick panel) Pnk Power tilt & power telescopic ecu (behind left side of dash) Red S5v1 S5v2 Sg1 Sg2 Sin1 Sin2 Telescopic motor & position sensor (inside base of steering column) Ti & te fuse 20a Tilt motor & position sensor (inside base of steering column) Transponder key computer (behind upper center of dash) Unlock warning switch Memory Rear Seat Wiring Diagram for Lexus LS 430 2003 List of elements for Memory Rear Seat Wiring Diagram for Lexus LS 430 2003: 72 (at right rear seat back) bq (behind upper center of dash) j/c 10 & 11 (left rear passenger's seat slide control) power seat motor (rearward of left rear fenderwell) B10 B10 (in body harness, under right center of rear backrest) Bp (at left rear seat back) Can Computer data lines system Cty Down Driver side j/b (at left kick panel) Gnd Hdwn Hot at all times Hrsw Hup I20 I21 Ik (at right side of dash) Ind J/c 23 J/c 27 (forward of right rear fenderwell) J/c 30 (rearward of right rear fenderwell) J/c 31 (behind left rear seat back) J10 J11 Left rear door courtesy switch Left rear head rest limit switch Left rear seat memory switch Luggage room j/b (on left side of luggage compartment) Mpx Mpx- Mpx-b1 fuse 7.5a Mpx1 Mpx2 Mswe Passenger side j/b (at right kick panel) Passenger side j/b ecu (at right kick panel) Pcv2 Power seat motor & position sensor (left rear passenger's seat head rest top & bottom control) Power seat motor & position sensor (right rear passenger's seat head rest top & bottom control) Power seat motor (right rear passenger's seat slide control) Power seat position sensor (left rear passenger's seat slide control) Power seat position sensor (right rear passenger's seat slide control) Pvcc R12 R13 R14 R15 Rear door ecu (left) (inside left rear door) Rear door ecu (right) (inside right rear door) Rear seat control switch Rear seat ecu (left) (behind left rear seat back) Rear seat ecu (right) (behind right rear seat back) Rear seat reset switch Red Right rear door courtesy switch Right rear head rest limit switch Right rear seat memory switch Rr seat lh fuse 30a Rr seat rh fuse 30a Rrsw Sel Set Sgnd Sld+ Sld- Ssrh Ssrs Ssrv Sysb
NAVIGATION Navigation Wiring Diagram for Lexus LS 430 2003 List of elements for Navigation Wiring Diagram for Lexus LS 430 2003: 69 (behind upper center of dash) j/c 16 & 17 (rearward of right rear fenderwell) j/c 28 +b1 Acc Aui+ Aui- Auo+ Auo- B12 (in body harness, near navigation ecu connectors) Back Combination meter Computer data lines system Crt fuse 7.5a Driver side j/b (at left kick panel) E16 E17 Fl+ Fl- Gnd Gnd1 Hot at all times Hot in on or acc Hot in on or start Hot with l-acc realay energized Ij (at right dash brace) J/c 14 & 15 (behind upper center of dash) J/c 30 (rearward of right rear fenderwell) J14 J15 J16 J17 Left front door speaker Luggage room j/b (on left side of luggage compt) Macc Mco+ Mco- Mcvd Mi1+ Mic- Multi-display N-mu Navigation ecu (on lower right side of luggage compt) Nca Nvmu P-acc fuse 7.5a P-jg fuse 7.5a Parking brake switch (behind left end of dash, on parking brake mechanism) Passenger side j/b (at right kick panel) Passenger side j/b ecu (at right kick panel) Pbew Pkb Pnk Red Rev Rr acc fuse 7.5a S29 S30 Sgnd Snse Sound systems Spd Spdo Stereo component amplifier (on right side of luggage compt, behind trim) Sync T14 Tel fuse 7.5a Telephone transceiver & speaker relay (w/ lexus link: on right side of luggage compt) (w/o lexus link: on left side of luggage compt) Tx+ Tx- Parking Assistant Wiring Diagram for Lexus LS 430 2003 List of elements for Parking Assistant Wiring Diagram for Lexus LS 430 2003: 43 (on left side of luggage compt) luggage room j/b (rearward of left rear fenderwell) j/c 23 B4 (in body harness, at center of rear bumper) Clearance sonar buzzer (front) (behind left side of dash) Clearance sonar buzzer (rear) (near center of rear speaker shelf, at base of rear window) Clearance sonar ecu (on left side of luggage compt) Clearance sonar switch (outer mirror switch) Clsw Computer data lines system Driver side j/b (at left kick panel) E11 E13 E3 (in engine harness, behind left headlight) Fbz Fbz+ Fcl Fcr Fgnd Fls Frs Gauge fuse 7.5a Hot in on or start Hot with l-ig1 realay energized Interior lights system Luggage room j/b (on left side of luggage compt) Mgnd Rbl Rbr Rbz Rbz+ Red Rgnd Rr ig fuse 7.5a Ultrasonic sensor (front left center) (behind front bumper fascia) Ultrasonic sensor (front left side) (behind front bumper fascia) Ultrasonic sensor (front left) (behind front bumper fascia) Ultrasonic sensor (front right center) (behind front bumper fascia) Ultrasonic sensor (front right side) (behind front bumper fascia) Ultrasonic sensor (front right) (behind front bumper fascia) Ultrasonic sensor (rear left center) (behind rear bumper fascia) Ultrasonic sensor (rear left) (behind rear bumper fascia) Ultrasonic sensor (rear right center) (behind rear bumper fascia) Ultrasonic sensor (rear right) (behind rear bumper fascia)
PASSIVE RESTRAINTS Electric Tension Reducer Wiring Diagram for Lexus LS 430 2003 List of elements for Electric Tension Reducer Wiring Diagram for Lexus LS 430 2003: 23 A24 A25 Air bag Air bag sensor assembly (behind lower center of dash, on transmission tunnel) Bkll Bklr Dbkl Driver side j/b (at left kick panel) Driver side j/b ecu (at left kick panel) Gauge fuse 7.5a Hot in on or start Ik (at right side of dash) J/c 14 (behind upper center of dash) J/c 23 (rearward of left rear fenderwell) Left front buckle switch Left tension reducer solenoid (near base of left "b" pillar) Mpx2 P-ig fuse 7.5a Passenger side j/b (at right kick panel) Passenger side j/b ecu Rbe+ Right front buckle switch Right tension reducer solenoid (near base of right "b" pillar) Power Shoulder Belt Anchorage Wiring Diagram for Lexus LS 430 2003 List of elements for Power Shoulder Belt Anchorage Wiring Diagram for Lexus LS 430 2003: 52 (inside front of left front door) B/anc Bdr Bes Computer data lines system Cpub D b/anc fuse 5a D24 D25 Dbm+ Dbm- Down Driver door ecu Driver side j/b (at left kick panel) Driver side j/b ecu Dsdn Dse Dsup F16 F17 Front passenger door ecu (inside right front doo) Gnd Gnd1 Hot at all times Hot in on or start I15 Ig (at left side of dash) Ii (at right side of shift lever) Ik (at right side of dash) J/c 21 (forward of left rear fenderwell) J/c 27 (forward of right rear fenderwell) J10 Left front shoulder belt adjust switch Mpx- Mpx-b1 fuse 7.5a Mpx-ig fuse 7.5a Mpx1 Mpx2 P b/anc fuse 5a P door fuse 25a Passenger side j/b (at right kick panel) Passenger side j/b ecu Pbm+ Pbm- Psdn Pse Psup Red Right front shoulder belt adjust switch Shoulder belt anchor motor & position sensor (left) (near center of left "b" pillar) Shoulder belt anchor motor (right) (near center of right "b" pillar) Sig
POWER DISTRIBUTION Power Distribution Wiring Diagram (1 of 5) for Lexus LS 430 2003 List of elements for Power Distribution Wiring Diagram (1 of 5) for Lexus LS 430 2003: 80 (at right kick panel) passenger side j/b (see headlights system) Abs 1 fuse 40a Abs 2 fuse 40a Air conditioning system Air conditioning system & body computer system Air sus fuse 40a Alt fuse 140a Alt-s fuse 5a Am 2 fuse 30a Anti-lock brake system & cruise control system Anti-theft system, body computer system & horns system Anti-theft system, body computer system, door locks system & power windows system Anti-theft system, body computer system, door locks system, mirrors system, passive restraints system, power windows system & seats system Battery Battery fuse 30a Body computer system Body computer system & exterior lights system Body computer system & headlights system systems Body computer system, exterior lights system, headlights system, instrument cluster system, interior lights system, memory system, mirrors system, trunk, tailgate, fuel doors system & wiper/washer system C12 C13 Crt fuse 7.5a Cruise control system Cruise control system, engine controls system & transmission systems D-j/b fuse 80a D/c cut fuse 20a Defog fuse 40a Defogger system E16 Efi 1 fuse 30a Efi 2 fuse 7.5a Efi main relay Electronic suspension system Engine controls system Engine room j/b 1 (on left front of engine compt, behind headlight) Engine room r/b 1 Etcs fuse 10a Fan fuse 50a Fan relay Fl main From ignition switch (diagram 3 of 5) Fusible link block H-lp hi fuse 20a Haz fuse 15a Headlamp relay Heater fuse 50a Horn fuse 10a I10 I21 Ig2 fuse 7.5a Ig2 relay Lug j/b fuse 50a Mirrors system & passive restraints system Mpx-b Mpx-b1 fuse 7.5a Mpx-b2 fuse 7.5a Mpx-b3 fuse 7.5a Navigation system Nca P-j/b fuse 80a Passenger side j/b ecu R/b fuse 60a Radio 1 fuse 7.5a Red Seats system Sound system Starter Starting/ charging system To dome fuse (diagram 2 of 5) To driver side j/b (d-acc relay) (diagram 4 of 5) To engine room j/b 1 (r/b 1, h-lp cln fuse, 30a) (diagram 2 of 5) To engine room j/b 1 (r/b 1, h-lp l lwr, fuse 15a) (diagram 2 of 5) To engine room j/b 1 (r/b 1, ign fuse, 7.5a) (diagram 2 of 5) To ignition switch (diagram 3 of 5) To junction connector j3 (diagram 2 of 5) To luggage room j/b (diagram 5 of 5) To passenger side j/b (p door fuse, 25a) (diagram 3 of 5) W/ compass W/o compass Power Distribution Wiring Diagram (2 of 5) for Lexus LS 430 2003 List of elements for Power Distribution Wiring Diagram (2 of 5) for Lexus LS 430 2003: 41 (rb 1, ig2 relay) (diagram 1 of 5) A/c ig fuse 7.5a Air conditioning system Air conditioning system, cooling fans system, cruise control system, defogger system, exterior lights system, mirrors system, navigation system, seats system, starting/charging system, transmissions system & wiper/washer system Anti-theft system, body computer system, exterior lights system & headlights system Body computer system & headlights system Body computer system & wiper/ washer system Body computer system & wiper/washer system Cruise control system, engine controls system & transmissions system Dome fuse 10a E13 Ec (left radiator side support) Engine controls system & starting/ charging system Engine room j/b 1 Engine room j/b 1 (on left front of engine compt, behind headlight) Engine room r/b 1 Engine room r/b 1 (on left front of engine compt, behind headlight) Fr fog fuse 15a Fr ig fuse 7.5a From driver side j/b (d-ig1 relay) (diagram 4 of 5) From engine room j/b 1 (r/b 1, headlamp relay) (diagram 1 of 5) From engine room j/b 1 (r/b 1, ig2 relay) (diagram 1 of 5) From engine room j/b 1 j From fr fog fuse (diagram 2 of 5) From fusible link block (r/b fuse, 60a) (diagram 1 of 5) From passenger side j/b (mpx-b1 fuse, 7.5a) (diagram 1 of 5) H-lp cln fuse 30a H-lp l lwr fuse 15a H-lp r lwr fuse 15a Ig1 relay Ign fuse 7.5a Inj fuse 10a J/c 3 (near engine control module, in protective case) J/c 7 (below engine room room j/b 1 & engine room r/b 1) Passenger side j/b (at right kick panel) Red Tail fuse 7.5a To ig1 relay (diagram 2 of 5) Washer fuse 20a Wip fuse 30a Wiper/ washer system Power Distribution Wiring Diagram (3 of 5) for Lexus LS 430 2003 List of elements for Power Distribution Wiring Diagram (3 of 5) for Lexus LS 430 2003: 57 20a Acc Air conditioning system, body computer system, instrument cluster system, mirrors system, navigation system, power tops system, seats system, warning system & wiper/washer system Air conditioning system, instrument cluster system, navigation system & sound system Am1 Am2 Anti-theft system, body computer system, door locks system, interior lights system, mirrors system, passive restraints system & power tops system B/anc C17 D door fuse 25a Door lock system interior light system anti-theft system power window system E17 Engine controls system, starting/ charging system & transmissions system Engine room j/b 1 (on left front of engine compt, behind headlight) Engine room r/b 1 F11 From driver side j/b (am1 fuse, 7.5a) (diagram 4 of 5) From driver side j/b (d-acc relay) (diagram 4 of 5) From driver side j/b (d-ig1 relay) (diagram 4 of 5) From fusible link block (am2 fuse, 30a) (diagram 1 of 5) From fusible link block (p-j/b fuse, 80a) (diagram 1 of 5) Front cigarette lighter Fusible link block (on right rear of engine compt) G10 G302 (right side of shift lever) H-lp lvl fuse 5a Headlights system Ig1 Ig2 Ignition switch Ik (right side side panel) J10 Junction connectors j/c 12 & j/c 13 (behind upper center of dash) Lock Navigation system & sound system P b/anc fuse 5a P door fuse 25a P rr-ig fuse 10a P s/htr fuse 15a P-acc fuse 7.5a P-acc relay P-cig fuse 15a P-ig fuse 7.5a P-ig1 relay Passenger side j/b (at right kick panel) Passenger side j/b ecu Pnk Red Rr door lh fuse 20a Rr door rh fuse Seats system St2 Sta fuse 7.5a Start Starter relay Tel fuse 7.5a To passenger side j/b (ig2 fuse 7.5a) (diagram 1 of 5) Power Distribution Wiring Diagram (4 of 5) for Lexus LS 430 2003 List of elements for Power Distribution Wiring Diagram (4 of 5) for Lexus LS 430 2003: 69 (right side side panel) ik A/c fuse 7.5a Abs-ig fuse 7.5a Air conditioning system Air conditioning system & body computer system Airsus fuse 20a Am1 fuse 7.5a Anti-theft system, body computer system, defogger system, door locks system, mirror system, passive restraints system & power windows system Anti-theft system, body computer system, door locks system & power windows system Anti-theft system, body computer system, door locks system, mirrors system, power windows system & shift interlock system B/anc Body computer system Body computer system & horns system Body computer system, cruise control system, electronic suspension system, engine controls system, exterior lights system, seats system, shift interlock system & transmission system Body computer system, garage door system & interior lights system Cruise control system Cruise control system, electronic suspension system, engine controls system & transmission system D b/anc fuse 5a D p/seat fuse 30a D rr-ig fuse 10a D s/htr fuse 15a D-acc fuse 7.5a D-acc relay D-cig fuse 15a D-ig1 relay Driver side j/b (at left kick panel) Driver side j/b ecu E10 E11 E17 Electronic suspension system F11 F12 F15 F16 F17 F18 From d s/htr p fuse 15a (diagram 4 of 5) From fusible link block (d-j/b fuse, 80a) (diagram 1 of 5) From security q fuse 7.5a (diagram 4 of 5) G10 G202 (left side of dash) Gauge fuse 7.5a I15 I17 J/c 30 (rearward of right rear fenderwell) J10 Memory system Mpx-ig fuse 7.5a Navigation system Obd fuse 7.5a Panel fuse 7.5a Passive restraints system & body computer system Pnk Power outlet Pwr outlet fuse 15a Rear cigarette lighter Red Seats system Security fuse 7.5a Shift interlock system Stop fuse 5a Ti & te fuse 20a To engine room j/b 1 (r/b 1, ig1 relay) (diagram 2 of 5) To gauge fuse 7.5a (diagram 4 of 5) To ignition switch (diagram 3 of 5) To j/c 12 & j/c 13 (diagram 3 of 5) To panel fuse 7.5a (diagram 4 of 5) To passenger side j/b (p-acc relay) (diagram 3 of 5) Power Distribution Wiring Diagram (5 of 5) for Lexus LS 430 2003 List of elements for Power Distribution Wiring Diagram (5 of 5) for Lexus LS 430 2003: 42 Acc Air conditioning system & body computer system Amp fuse 30a Body computer system & interior lights system Body computer system, exterior lights system & interior lights system C10 C11 Cellular telephone system Coil Contact E13 E19 F10 From fusible link block (lug j/b fuse, 50a) (diagram 1 of 5) From rr s/shade r fuse 15a (diagram 5 of 5) Fuel opn fuse 10a Fuel opn(p) J/c 23 (rearward of left rear fenderwell) L-acc relay L-ig1 relay L-o/c (p) Lce lp fuse 7.5a Luggage room j/b (on left side of luggage compartment) Luggage room j/b ecu Navigation system Noise filter P p/seat fuse 30a P-gnd Power tops system Rr a/c fuse 7.5a Rr acc fuse 7.5a Rr ecu-b fuse 7.5a Rr ig fuse 7.5a Rr s/htr fuse 20a Rr s/shade fuse 15a Rr s/shade relay Rr seat lh fuse 30a Rr seat rh fuse 30a S roof fuse 25a Seats system Sound system To fuel opn fuse 10a (diagram 5 of 5)
POWER DOOR LOCKS Power Door Locks Wiring Diagram (1 of 2) for Lexus LS 430 2003 List of elements for Power Door Locks Wiring Diagram (1 of 2) for Lexus LS 430 2003: 50 A1+ A1- Anti-theft system Bdr Bl (at left rear floor partition panel) Bn (at right rear floor partition panel) Cps1 Cps2 Cps3 Cpse Cpub Cty D24 D25 Dbls Dle Driver door ecu (inside front of left front door) Driver side j/b (at left kick panel) F11 F16 F17 Front passenger door ecu (inside right front door) Full Ground Half Hot in on or start I15 Ill+ Junction connector 21 (forward of left rear fenderwell) Junction connector 27 (forward of right rear fenderwell) Keye Kul Left front door courtesy switch Left front door lock motor Lsw Mpx-ig fuse 7.5a Mpx1 Mpx2 Mul Pnk Pole Power window master switch Pwe Pws Red Right front door courtesy switch Right front door lock control switch Right front door lock motor Sig Warning system Power Door Locks Wiring Diagram (2 of 2) for Lexus LS 430 2003 List of elements for Power Door Locks Wiring Diagram (2 of 2) for Lexus LS 430 2003: 53 A1+ A1- Anti-theft system Bdr Bl (at left rear floor partition panel) Bn (at right rear floor partition panel) Bo (at right rear quarterpanel) Cps1 Cps2 Cps3 Cpse Cpub Cty D door fuse 25a Dbls Dlel Driver side j/b (at left kick panel) Full G10 Ground Half Hot at all times I10 I22 J10 J11 J12 J13 Junction connector 10 &11 (behind upper center of dash) Junction connector 12 & 13 (behind upper center of dash) Junction connector 21 (forward of left rear fenderwell) Junction connector 27 (forward of right rear fenderwell) Junction connector 30 (rearward of right rear fenderwell) Left rear door courtesy switch Left rear door ecu (inside left rear door) Left rear door lock motor Lh rr door fuse 20a Lsw Mpx-b1 fuse 7.5a Mpx1 Mpx2 P door fuse 25a Passenger side j/b (at right kick panel) Pole R13 R14 Red Rh rr door fuse 20a Right rear door courtesy switch Right rear door ecu (inside right rear door) Right rear door lock motor Sel1 Sig
POWER MIRRORS Power Mirrors Wiring Diagram for Lexus LS 430 2003 List of elements for Power Mirrors Wiring Diagram for Lexus LS 430 2003: 23 D25 Driver door ecu (inside front of left front door) Ec+ Ec- Eci+ Eci- F14 F16 F17 Front passenger door ecu (inside right front door) Gnd Gnd5 Hot in on or start I12 Ig1 Ii (at right side of shift lever) Inner mirror J/c 14 (behind upper center of dash) Left outside rear view mirror Overhead j/b (at front of roof opening) P-ig fuse 7.5a Passenger side j/b (at right kick panel) Right outside rear view mirror
POWER SEATS Climate Control Seats Wiring Diagram for Lexus LS 430 2003 List of elements for Climate Control Seats Wiring Diagram for Lexus LS 430 2003: 49 (forward (under right front seat) Blr wtr lh Blr wtr rh Climate control seat switch Computer data lines system D s/htr fuse 15a Driver climate control seat ecu (under right side of driver's seat) Driver seat climate controller (seat back) Driver seat ecu (below left side of driver's seat) Driver side j/b (at left kick panel) Fenderwell) Front passengers climate control seat ecu (under front passenger's seat) G j14 G j15 Hot in on or start Idl Ik (at right side of dash) Ind J/c 14 & 15 (behind upper center of dash) J/c 21 Lh cush thrm Lind Lv5 Lvg Lvs Mpx1 Of left rear P s/htr fuse 15a P-ig fuse 7.5a Passenger seat climate controller (seat back) Passenger side j/b (at right kick panel) Pnk Red Rh cush thrm Rind Rlid Rrid Rsid Rv5 Rvg Rvs Tb5 Tbs Tdb+ Tdb- Ted Ted lh/cush Ted rh/cush Driver"s Lumbar Wiring Diagram for Lexus LS 430 2003 List of elements for Driver"s Lumbar Wiring Diagram for Lexus LS 430 2003: 10 (forward of left rear fenderwell) D p/seat fuse 30a Driver side j/b (at left kick panel) Hot at all times J/c 21 J10 Power seat control switch (driver's seat lumbar support) Power seat motor (driver's seat lower side lumbar support control) Power seat motor (driver's seat upper side lumbar support control) Red Heated Seats Wiring Diagram, Front for Lexus LS 430 2003 List of elements for Heated Seats Wiring Diagram, Front for Lexus LS 430 2003: 18 (forward of left rear fenderwell) D s/htr fuse 15a Driver seat heater Driver side j/b (at left kick panel) G j14 G j15 Hot in on or start Ik (at right side of dash) Ir (under right front seat) J/c 14 & 15 (behind upper center of dash) J/c 21 P s/htr fuse 15a P-ig fuse 7.5a Passenger seat heater Passenger side j/b (at right kick panel) Seat heater switch Thl Thr Heated Seats Wiring Diagram, Rear for Lexus LS 430 2003 List of elements for Heated Seats Wiring Diagram, Rear for Lexus LS 430 2003: 26 B10 (w/ rear power seats) B11 (w/o rear power seats) B9 (w/ rear power seats) b11 (w/o rear power seats) Bp (at left rear seat back) G j14 G j15 Hil Hir Hot in on or start Hot with l-ig1 relay energized Ik (at right side of dash) Indc J/c 14 & 15 (behind upper center of dash) J/c 27 (forward of right rear fenderwell) Left rear seat heater Luggage room j/b (on left side of luggage compt) P-ig fuse 7.5a Passenger side j/b (at right kick panel) Power seats Rear seat heater switch Right rear seat heater Rr s/htr fuse 20a Seat heater switch W/ rear power seats W/o rear W/o rear power seats Passenger"s Power Seat Wiring Diagram for Lexus LS 430 2003 List of elements for Passenger"s Power Seat Wiring Diagram for Lexus LS 430 2003: 23 Down Front Front passenger's power seat control switch Front passenger's power seat sub control switch Head rest Hot at all times Ir (under right front seat) Lifter Luggage room j/b (on left side of luggage compt) Lumbar P p/seat fuse 30a Power seat control switch (front passenger's seat lumbar support) Power seat motor (front passenger's seat front lifter control) Power seat motor (front passenger's seat front vertical control) Power seat motor (front passenger's seat head rest control) Power seat motor (front passenger's seat lumbar support control) Power seat motor (front passenger's seat reclining control) Power seat motor (front passenger's seat slide control) Rear Reclining Red Slide Vertical Rear Vibrating Seats Wiring Diagram for Lexus LS 430 2003 List of elements for Rear Vibrating Seats Wiring Diagram for Lexus LS 430 2003: 37 B10 Bp (at left rear seat back) Bq (at right rear seat back) D rr-ig fuse 10a Driver door ecu (inside front of left front door) Driver side j/b (at left kick panel) Front passenger door ecu (inside right front door) G j10 Gnd1 Hot at all times Hot in on or start I14 I20 J/c 10 & 11 (behind upper center of dash) J/c 31 (behind left rear seat back) J11 g Left rear door ecu (inside left rear door) Left rear seat ecu (behind left rear seat back) Left vibration seat ecu (behind left rear seat back) Left vibrator (behind left rear seat back) Mpx Mpx-b1 fuse 7.5a Mpx1 Mpx2 P rr-ig fuse 10a Passenger side j/b (at right kick panel) Right rear door ecu (inside right rear door) Right rear seat ecu (behind right rear seat back) Right vibration seat ecu (behind right rear seat back) Right vibrator (behind right rear seat back) Stop Strt Sysb Vib+ Vib- Vibe Vibration switch (rear seat control switch)
POWER TOP/SUNROOF Power Top/Sunroof Wiring Diagram for Lexus LS 430 2003 List of elements for Power Top/Sunroof Wiring Diagram for Lexus LS 430 2003: 63 Cls Combination meter Cpu Cty D25 Data Dome fuse 10a Door lock control receiver (inner mirror) Down Driver door ecu (inside front of left front door) Driver side j/b (at left kick panel) Dwn E11 E13 E16 F15 F17 F18 Gateway ecu (behind left side of dash) Gauge fuse 7.5a Gnd Hot at all times Hot in on or start I14 Ig3 Ii (at right side of shift lever) Ik (at right side of dash) J/c 10 & 12 (behind upper center of dash) J/c 14 (behind upper center of dash) J/c 16 & 17 (behind upper center of dash) J10 J12 J16 J17 Left front door courtesy switch Left rear door courtesy switch Left rear door ecu (inside left rear door) Luggage room j/b (on left side of luggage compt) Moon roof control ecu (at front of roof opening) Mpd1 Mpd2 Mpi2 Mpx Mpx-b2 fuse 7.5a Mpx1 Mpx2 Opn Overhead j/b (at front of roof opening) P-ig fuse 7.5a Passenger side j/b (at right kick panel) R13 R14 Rc0 Rda Red Right front door courtesy switch Right front door ecu (inside right front door) Right rear door courtesy switch Right rear door ecu (inside right rear door) Rssi S/roof fuse 25a Theft deterrent ecu (behind upper right center of dash) Transponder key computer (behind upper center of dash)
POWER WINDOWS Power Windows Wiring Diagram (1 of 3) for Lexus LS 430 2003 List of elements for Power Windows Wiring Diagram (1 of 3) for Lexus LS 430 2003: 79 (forward of left rear fenderwell) junction connector 21 (inside front of left front door) driver door ecu +b1 +b2 Acc Auto Bdr Bl (at left rear floor partition panel) Bzr Bzr2 Bzr3 Bzrg Cpub Cty D door fuse 25a D-acc fuse 7.5a D24 D25 Data Ddn Door lock control receiver (inner mirror) Driver side j/b (at left kick panel) Dt1 Dt2 Dt3 Dup F11 F17 F18 G10 Gnd Hot at all times Hot in on or acc Hot in on or start I14 I15 I19 I21 I22 Ih (at right side of shift lever) Ii (at right side of shift lever) J/c 12, j/c 13 (behind upper center of dash) J10 J11 J12 J13 J14 j/c 14, j/c 15 (behind upper center of dash) J15 Junction connector 10, junction connector 11 (behind upper center of dash) Keyless buzzer (near base of "a" pillar) Keyless buzzer on/off switch Left front door courtesy switch Left front power window motor Lmt Mdn Mpx-ig fuse 7.5a Mpx1 Mpx2 Mup Passenger side j/b (at right kick panel) Pls Power window master switch Pwe Pws Rc0 Rda Red Rssi Sc1 Sc2 Sc3 Security fuse 7.5a Sgnd Sig Theft deterrent ecu (behind upper right center of dash) Trans- ponder key computer (behind upper center of dash) W/l Wls1 Wlsw Power Windows Wiring Diagram (2 of 3) for Lexus LS 430 2003 List of elements for Power Windows Wiring Diagram (2 of 3) for Lexus LS 430 2003: 39 Auto Bdr Bn (at right rear floor partition panel) Cpub Cty E11 E18 F16 F17 Front passenger door ecu (inside right front door) Gateway ecu (behind left end of dash) Gnd Hot at all times I10 I13 J10 J10 j/c 10, j/c 11 (behind upper center of dash) J11 Junction connector 27 (forward of right rear fenderwell) Lmt Mdn Mpd1 Mpd2 Mpx-b1 fuse 7.5a Mpx1 Mpx2 Mup P door fuse 25a Passenger side j/b (at right kick panel) Pct Pls Pwe Red Right front door courtesy switch Right front power window control switch Right front power window motor Sgnd Sig Wls1 Power Windows Wiring Diagram (3 of 3) for Lexus LS 430 2003 List of elements for Power Windows Wiring Diagram (3 of 3) for Lexus LS 430 2003: 41 (inside left rear door) left rear door ecu Auto Bdr Bl (at left rear floor partition panel) Bn (at right rear floor partition panel) Bo (at right rear quarterpanel) Cpub Cty Gnd Hot at all times Junction connector 21 (forward of left rear fenderwell) Junction connector 27 (forward of right rear fenderwell) Junction connector 30 (rearward of right rear fenderwell) Left rear door courtesy switch Left rear power window control switch Left rear power window motor Left rr door fuse 20a Lmt Mdn Mpx1 Mpx2 Mup Passenger side j/b (at right kick panel) Pct Pcti Pcto Pls Pwe R12 R13 R14 R15 Red Right rear door courtesy switch Right rear door ecu (inside right rear door) Right rear power window control switch Right rear power window motor Right rr door fuse 20a Sel1 Sgnd Sig Rear Window Sun Shade Wiring Diagram for Lexus LS 430 2003 List of elements for Rear Window Sun Shade Wiring Diagram for Lexus LS 430 2003: 25 (at right side of firewall) ik Bm (at left rear quarterpanel) Bp (at left rear seat back) Ecu Fsw Hot at all times J/c 23 (rearward of left rear fenderwell) J/c 26 (near center of rear speaker shelf) L14 Lmt Luggage room j/b (on left side of luggage compt) Luggage room j/b ecu Luggage room j/b ecu (on left side of luggage compt) P-gnd Rear sunshade control relay (below center of rear speaker shelf) Rear sunshade switch Rear sunshade switch (rear seat control switch) (w/ rear power seat) Rev Rr s/shade fuse 15a Rr s/shade relay Rsc Rss Rsw W/ rear pwr seat and/or electronic modulated air suspension W/o rear pwr seat and/or electronic modulated air suspension
RADIO Radio Wiring Diagram (1 of 2) for Lexus LS 430 2003 List of elements for Radio Wiring Diagram (1 of 2) for Lexus LS 430 2003: 41 Acc Amp fuse 30a Atx+ Atx- C10 E17 Gateway ecu (behind left end of dash) Gnd Gtx+ Gtx- Hot at all times Hot in on or acc Hot with l-acc relay energized Ij (at right dash brace) J14 J15 J28 J29 Junction connector 14 & 15 (behind upper center of dash) Junction connector 28 & 29 (rearward of right rear fenderwell) Junction connector 30 (rearward of right rear fenderwell) Luggage room j/b (on left side of luggage compt) Multi- display Mute Nca P-acc fuse 7.5a Passenger side j/b (at right kick panel) Radio & player Radio 1 fuse 7.5a Red Rr acc fuse 7.5 Rr ecu-b fuse 7.5 Sgnd Stereo component tuner (on lower right side of luggage compartment) Tel fuse 7.5a Tx+ Tx- Txs+ Txs- W/ navigation W/ rear audio controller Radio Wiring Diagram (2 of 2) for Lexus LS 430 2003 List of elements for Radio Wiring Diagram (2 of 2) for Lexus LS 430 2003: 70 +b2 7 speaker Acc Audio & rear a/c control switch (w/ rear audio controller) Aui+ Aui- Auo+ Auo- Bp (at left rear seat back) C12 Combination meter Fl+ Fl- Fr+ Fr- Gnd J16 J17 Junction connector 16 & 17 (behind upper center of dash) Junction connector 30 (rearward of right rear fenderwell) Left front door speaker Left front tweeter Left rear door speaker Left rear tweeter (9 speaker) Ml+ Ml- Mmut Mr+ Mr- Mtx+ Mtx- Mute N-mu Navigation ecu (on lower right side of luggage compartment) Nvmu Pnk Red Right front door speaker Right front tweeter Right rear door speaker Right rear tweeter (9 speaker) Rl+ Rl- Rr+ Rr- Rtx+ Rtx- S28 S29 S30 Sp+ Sp- Spd Spdo Spi+ Spi- Stereo component amplifier (on right side of luggage compt, behind trim) T14 T15 Telephone transceiver & speaker relay (w/ link system: on right side of luggage compartment) (w/o link system: on left side of luggage compartment) Tmut Tx+ Tx- W/ navigation W/o navigation Wfl+ Wfl- Wfr+ Wfr- Woofer
SHIFT INTERLOCK Shift Interlock Wiring Diagram for Lexus LS 430 2003 List of elements for Shift Interlock Wiring Diagram for Lexus LS 430 2003: 21 Acc D-acc fuse 7.5a Driver side j/b (at left kick panel) Driver side j/b ecu (at left kick panel) F18 Gauge fuse 7.5a Hot at all times Hot in acc or on Hot in on or start Ih (at right side of shift lever) Ik (at right side of dash) J/c 11 (behind upper center of dash) Key interlock solenoid Kls+ Red Shift lock control ecu (below shift lever, in center console) Stop fuse 5a Stoplight switch (above brake pedal, on bracket) Stp Stpi Unlock warning switch
STARTING/CHARGING Charging Wiring Diagram for Lexus LS 430 2003 List of elements for Charging Wiring Diagram for Lexus LS 430 2003: 24 Alt fusible link 140a Alt-s fusible link 5a Battery Battery ground C j16 C j17 Charge indicator Combination meter Computer data lines system Cpu Driver side j/b (at left kick panel) Engine control module (on left front of engine compartment in protective case) Engine room 1 r/b (on left front of engine compt, behind headlight) Fr ig fuse 7.5a Fusible link block (on right rear of engine compartment) Gauge fuse 7.5a Generator Hot in on or start Ih (at right side of shift lever) Junction connector 1 & junction connector 2 (near engine control module, in protective case) Junction connector 16 & junction connector 17 (behind upper center of dash) Mpx1 Nca Red Starting Wiring Diagram for Lexus LS 430 2003 List of elements for Starting Wiring Diagram for Lexus LS 430 2003: 22 Acc Am2 Am2 fuse 30a Battery Battery ground Control module (on left front of engine compt, in protective case) E10 E2 (in engine harness, near ecu box) Ee (on right cylinder head) Engine room 1 r/b (on left front of engine compt, behind headlight) Engine sta Fusible link block (on right rear of engine compt) Ignition switch Junction connector 5 & junction connector 6 (near engine control module, in protective case) Lock Nca Park/neutral position switch (on right side of transmission) St2 Sta fuse 7.5a Start Starter Starter relay
SUPPLEMENTAL RESTRAINTS Supplemental Restraints Wiring Diagram (1 of 2) for Lexus LS 430 2003 List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for Lexus LS 430 2003: 80 (at right side of firewall) ik (near lower rear of left rear door opening) left rear side air bag sensor +sl +sr -sl -sr A23 A24 A25 Air bag sensor assembly (behind lower center of dash, on transmission tunnel) Air bag squib (steering wheel pad) Anti-theft system D2+ D2- Driver side j/b (at left kick panel) Escl Escr Esl Esr Fsr+ Fsr- Gsw Hot in on or start Icl+ Icl- Icr+ Icr- Ig1 Ig2 Ig2 fuse 7.5a J/c 23 (at left rear quarter panel) Lbe+ Left air bag curtain shield squib Left front buckle switch (in left front seat belt buckle) Left front pretensioner Left rear pretensioner Left side air bag squib Lsp+ Lsp- Mpx-ig fuse 7.5a Mpx1 Mpx2 P2+ P2- Passenger side j/b (at right kick panel) Pl+ Pl- Plr+ Plr- Pnk Pr+ Pr- Prr+ Prr- Rbe+ Red Right curtain shield air bag squib Right front buckle switch (in right front seat belt buckle) Right front pretensioner (near base of right "b" pillar) Right front side air bag sensor (near base of right "b" pillar) Right rear pretensioner (near base of right "c" pillar) Right rear side air bag sensor (near lower rear of right rear door opening) Right side air bag squib Rl+ Rl- Rr+ Rr- Sfl+ Sfl- Sfr+ Sfr- Sil Ssl+ Ssl- Ssr+ Ssr- Vucl Vucr Vupl Vupr Supplemental Restraints Wiring Diagram (2 of 2) for Lexus LS 430 2003 List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for Lexus LS 430 2003: 53 (at right side of shift lever) ih (right side of shift lever) ii +sl +sr -sl -sr A/c control assembly A11 Air bag Air bag squib (front passenger air bag asssembly) C12 Center cluster integration panel Combination meter Cpu Data link connector 3 (partial) (below left side of dash) Dbkl Driver side j/b (at left kick panel) Driver side j/b ecu (at left kick panel) E10 Engine control module (on left front of engine compartment, in protective case) Engine room 2 r/b (on left front of engine compartment, behind headlight) Esl F13 F15 Front controller Gateway ecu (behind left end of dash) Gauge fuse 7.5a Hot in on or start J16 J17 Junction connector (behind upper center of dash) Junction connector 13 (behind upper center of dash) Left front air bag sensor (on left front of engine compartment) Left front side air bag sensor (near base of left "b" pillar) Mpi1 Mpi2 Mpl2 Mpx + Mpx - Mpx- Mpx1 Mpx2 Passenger side j/b (at right kick panel) Passenger side j/b ecu Right front air bag sensor (on right front of engine compartment) Skid control ecu (behind left side of dash) Solid state Srs Ssl+ Ssl- Vupl W/ lexus navigation system W/o lexus navigation system
TRANSMISSION A/T Wiring Diagram (1 of 2) for Lexus LS 430 2003 List of elements for A/T Wiring Diagram (1 of 2) for Lexus LS 430 2003: 69 (engine harn, left side of engine compt, under engine room j/b 1) +b1 +bm 2002-03 Accelerator position sensor (behind left center of dash) Batt C15 Combination meter Computer data lines system Data link connector 3 (below left side of dash) Driver side j/b (behind left kick panel) Driver side j/b ecu (left kick panel) Ec (radiator left side support) Ect pwr Ect snow Efi 1 fuse 30a Efi main relay Electronically controlled transmission pattern select switch Engine control module (ecm) (left front of engine compt, in protective case) Engine room r/b 1 (left front of engine compt, behind headlight) Epa Eptk Etcs fuse 10a F15 Fr ig fuse 7.5a Gauge fuse 7.5a Hot at all times Hot in on or start Hot in start Ign fuse 7.5a Igsw Ii (right side of shift lever) Ik (right dash side panel) J/c 1, j/c 2 (near ecm) j2 J/c 13 (upper center of dash) J/c 16, j/c 17 (upper center of dash) J/c 3 (near ecm) J16 J16 j/c 16, j/c 17 (upper center of dash) J17 Mil Mpx- Mpx1 Mpx2 Mrel Passenger side j/b (behind right kick panel) Passenger side j/b ecu (behind right kick panel) Pnk/nlk Pwr Red Short connector sc1, sc2 (near ecm) Sil Snow Speedo Sta Sta fuse 7.5a Stop fuse 5a Stoplight switch (above brake pedal, on bracket) Stp Stpi Stpo Tac Tach Vcpa Vpa Vpa2 Vptk Wfse Wsfe A/T Wiring Diagram (2 of 2) for Lexus LS 430 2003 List of elements for A/T Wiring Diagram (2 of 2) for Lexus LS 430 2003: 45 (behind right kick panel) passenger side j/b (left side of transmission) electronically controlled transmission solenoid (right side of transmission) (integral to park/neutral position switch) a/t indicator light switch At4 Atl Braided C10 C16 E01 E02 E03 Ee (side of right cylinder head) Ef (side of left cylinder head) Engine control module (ecm) (left front of engine compt, in protective case) Engine coolant temperature sensor (front center of engine) Eoil Eta Ethw Ge01 J/c 4 (near ecm) J/c 5 (near ecm) Me01 Nca Nco+ Nco- Nssd Nssl O/d direct clutch speed sensor (left side of transmission) Oil Red Shift lock control ecu (in center console, below shift lever) Sln+ Sln- Slt+ Slt- Slu+ Slu- Sp2+ Sp2- Throttle control motor (on throttle body) Throttle position sensor (on throttle body) Thw Vehicle speed sensor (on transmission) Vta Vta2
TRUNK, TAILGATE, FUEL DOOR Fuel Door Release Wiring Diagram for Lexus LS 430 2003 List of elements for Fuel Door Release Wiring Diagram for Lexus LS 430 2003: 33 (behind upper center of dash) j/c 14 & 15 Bu+ Bu- Bubs Combination switch Driver side j/b (at left kick panel) Driver side j/b ecu E20 Fuel Fuel lid opener motor (on left side of luggage compt, behind left rear fenderwell) Fuel lid opener switch Fuel opn fuse 10a Fuel opn(o) Fuel opn(p) Gnd Hot at all times Ig (at left side of dash) J/c 23 (rearward of left rear fenderwell) J14 J15 L14 Luggage room j/b (on left side of luggage compartment) Luggage room j/b ecu Mpx+ Mpx-b Mpx-b3 fuse 7.5a Mpx1 Mpx2 P-gnd Passenger side j/b (at right kick panel) Power tilt & power telescopic ecu (behind left side of dash) Red Tx1 Trunk Release & Pull Down Wiring Diagram for Lexus LS 430 2003 List of elements for Trunk Release & Pull Down Wiring Diagram for Lexus LS 430 2003: 41 (behind upper center of dash) j/c 14 & 15 Bdcy Bu- Bubs Cls Computer data lines system Cty Door lock switch (luggage) Driver side j/b (at left kick panel) Driver side j/b ecu E12 Fuel opn fuse 10a Gnd Hot at all times Ig (at left side of dash) J/c 23 (rearward of left rear fenderwell) J/c 24 (on left rear of luggage compt lid) J14 J15 L-o/c (p) L12 L14 Lcls Lcm+ Lcm- Lcty Lopn Luggage compartment door closer motor (on center rear of luggage compt lid) Luggage compartment door opener switch Luggage room j/b (on left side of luggage compt) Luggage room j/b ecu Mpx+ Mpx- Mpx-b Mpx-b3 fuse 7.5a Mpx2 Opn P-gnd Passenger side j/b (at right kick panel) Red Tsw
WARNING SYSTEMS Warning Systems Wiring Diagram for Lexus LS 430 2003 List of elements for Warning Systems Wiring Diagram for Lexus LS 430 2003: 66 A24 A25 Air bag sensor assembly (behind lower center of dash, on transmission tunnel) C10 Combination meter Cpu Cty D25 Dbkl Dome fuse 10a Door ind Driver door ecu (inside front of left front door) Driver side j/b (at left kick panel) Driver side j/b ecu (at left kick panel) E10 E13 E16 Engine room 2 r/b (on left front of engine compt, behind headlight) F13 F15 Front controller Gateway ecu (behind left end of dash) Gauge fuse 7.5a Gnd1 Hot at all times Hot in on or start I14 Ig+ Ih (at right side of shift lever) Ii (at right side of shift lever) Ij (at right dash brace) Ik (at right side of dash) J/c 10 (behind upper center of dash) J/c 12 (behind upper center of dash) J/c 14 & 15 (behind upper center of dash) J/c 16 & 17 (behind upper center of dash) J/c 23 (rearward of left rear fenderwell) J14 J15 g J16 J17 Ksw Left front buckle switch (inside of left front seat belt buckle) Left front door courtesy switch Mpd1 Mpi2 Mpl2 Mpx-b2 fuse 7.5a Mpx1 Mpx2 P-ig fuse 7.5a Passenger seat belt warning light (clock) Passenger seat belt warning light (multi- display) Passenger side j/b (at right kick panel) Pbew Rbe+ Red Right front buckle switch (inside of right front seat belt buckle) S12 Seat belt ind Skid control ecu (behind left side of dash) Theft deterrent ecu (behind upper right center of dash) Transponder key computer (behind upper center of dash) Unlock warning switch W/ navigation system W/o navigation system
WIPER/WASHER Front Wiper/Washer Wiring Diagram for Lexus LS 430 2003 List of elements for Front Wiper/Washer Wiring Diagram for Lexus LS 430 2003: 38 Airbag C14 Combination switch Computer data lines system Ec (at left radiator side support) Engine room 1 r/b (on left front of engine compt, behind headlight) Engine room 2 r/b (on left front of engine compt, behind headlight) F j14 Front controller Front wiper motor (below left side of windshield) Fwas G j14 Gnd2 H j15 Hot at all times Hot in on or start Ig2 J/c 14 & 15 (behind upper center of dash) J/c 7 (below engine room 1 j/b & engine room 1 r/b) Mpx Mpx-b3 fuse 7.5a Mpx1 Mpx2 Overhead j/b (at front of roof opening) P-ig fuse 7.5a Passenger side j/b (at right kick panel) Passenger side j/b ecu (at right kick panel) Pnk Rain sensor (near top center of windshield) S/m S/s Sig Washer fuse 20a Washer level sensor (on washer fluid reservoir, below left headlight) Washer motor (on washer fluid reservoir, below left headlight) Wip Wip fuse 30a Wlvl Headlamp Washer Wiring Diagram for Lexus LS 430 2003 List of elements for Headlamp Washer Wiring Diagram for Lexus LS 430 2003: 22 A j1 A j2 C14 Combination switch Driver side j/b ecu (at left kick panel) Ec (at left radiator side support) Engine room 1 r/b (on left front of engine compt, behind headlight) Fr ig fuse 7.5a H-lp cln fuse 30a Hdcl Head Headlight cleaner control relay (behind left headlight) Headlight cleaner motor (below left headlight) Headlight cleaner switch Hot at all times Hot in on or start Ig (at left side of dash) J/c 1 & 2 (near engine control module, in protective case) Light control switch Mtr Off Tail
