Diagram sections — 33 (68 total)
AIR CONDITIONING ANTI-LOCK BRAKES ANTI-THEFT BODY CONTROL MODULES COMPUTER DATA LINES COOLING FAN CRUISE CONTROL DEFOGGERS ELECTRONIC POWER STEERING ENGINE PERFORMANCE EXTERIOR LIGHTS GROUND DISTRIBUTION HEADLIGHTS HORN INSTRUMENT CLUSTER INTERIOR LIGHTS MEMORY SYSTEMS NAVIGATION PASSIVE RESTRAINTS POWER ANTENNA POWER DISTRIBUTION 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 (1 of 2) for Lexus GS 300 2004 List of elements for Automatic A/C Wiring Diagram (1 of 2) for Lexus GS 300 2004: 82 (at middle of left inner fender panel) eb (behind left side of dash) gateway ecu (behind left side of dash) tilt & telescopic ecu (behind right side of dash) air inlet control servo motor (gs 300) (gs 430) ethw (gs 430) steering pad sw (combination switch) (in dash harness, behind instrument cluster) i1 (in dash harness, under center air vents) (in engine harness, inside of ecu box) e4 A/c control assembly (behind center of dash) A/c dual pressure switch (at upper left radiator support) A/c room temperature sensor (behind center of dash) A/c solar sensor (at upper right side of dash) A/c thermistor (behind center of dash) A13 A14 Acc Acmg Aif Air Air mix control servo motor (driver) (behind center of dash) Air vent mode control servo motor (behind right side of dash) Amcdr Amcpa Amhdr Amhpa Aod Aof Blw Dgs Driver side j/b (behind left kick panel) E2 (gs 300) E2 (in engine harness, at left rear top of engine) Ecu-b2 fuse 10a Engine control module (at left side of engine compt, in ecu box) Engine coolant temperature sensor (3.0l: on top left front of engine) (4.3l: on top right side of engine) Etam F13 Gnd Gs 300 Gs 430 Hot at all times Hot in acc or on I2 (in dash harn, under center air vents) Ii (at right side of dash) Ill Instrument panel j/b (behind upper center of dash) Interior lights system Junction connector 17 (behind upper right side of dash) Junction connector 18 (behind right kick panel) Lcki Mfrs Mpd1 Mpd2 Mpx+ Mpx- Mpx1 Mpx2 Mrec Passenger side j/b (behind right kick panel) Pre Radio fuse 15a Red S5-2 S5-3 S5-4 Sg-1 Sg-3 Sg-4 Sg-5 Tam Tel in Telephone transceiver & speaker relay (at right side of luggage compartment) Teli Thw Tpdr Tpi Tpo Tppa Tsdr Tspa Automatic A/C Wiring Diagram (2 of 2) for Lexus GS 300 2004 List of elements for Automatic A/C Wiring Diagram (2 of 2) for Lexus GS 300 2004: 47 (at middle of left inner fender panel) eb (at right side of dash) ii (in engine harness, inside of ecu box) e4 A/c ambient temperature sensor (near top left side of radiator support) A/c comp relay A/c condenser fan motor (on front left side of radiator) A/c magnetic clutch & lock sensor (on a/c compressor) A/c single pressure switch (at upper left radiator support) Air mix control servo motor (passenger) (behind right side of dash) Blower motor (behind lower right side of dash) Blower motor controller (behind right side of dash) Body ecu 1 Cds fan fuse 30a Driver side j/b (behind left kick panel) E1 (in engine harn, at front of engine) Ed (at rear of intake manifold) Ed (on left cylinder head) Engine room r/b 1 (on right side of engine compartment, behind strut tower) Engine room r/b 3 (on left side of engine compartment, front of strut tower) Exhaust gas sensor (at left front of engine compartment) F12 Fan 1 relay Fan 2 relay Fan 3 relay Gas Gnd Gs 300 Gs 430 Heater fuse 10a Heater fuse 50a Hot at all times Hot in on or start Htr relay I1 (in dash harness, behind instrument cluster) I6 (behind right side of glove box) Ig (at left side of dash) Ign fuse 5a Junction connector (behind left side of dash) Junction connector (behind upper right side of dash) Junction connector 2 (in ecu box) Junction connector 26 (in ecu box) Passenger side j/b (behind right kick panel) Passenger side r/b (behind right kick panel) Radiator fan motor (at left front of engine compt) Rdi fan fuse 30a Red Water temperature switch (at front of engine compartment, behind left side of grille)
ANTI-LOCK BRAKES Anti-lock Brakes Wiring Diagram (1 of 3) for Lexus GS 300 2004 List of elements for Anti-lock Brakes Wiring Diagram (1 of 3) for Lexus GS 300 2004: 51 (at left A19 A22 Abs & trac & vsc actuator (at left rear corner of engine compt) Abs & trac & vsc ecu (behind left side of dash) Abs 1 fuse 60a Abs 2 fuse 40a Abs motor relay Abs sol relay Ast Ea (at middle of right inner fender panel) Ee (under abs & trac & vsc actuator) Engine room r/b 1 (on right side of engine compt, behind strut tower) Engine room r/b 2 (on left side of engine compt, behind strut tower) Fl+ Fl- Fr+ Fr- Fss Gnd1 Gnd2 Hot at all times Junction connector 5 (in engine room r/b 2) Junction connector 6 (behind left kick panel) Kick Mr1 Mr2 Mt+ Mt- Mtt Nca Panel) Pmc Pnk R1+ R2+ Red Sa1 Sa2 Sa3 Sflh Sflr Sfrh Sfrr Srlh Srlr Srrh Srrr Str Trac motor relay Vcm Anti-lock Brakes Wiring Diagram (2 of 3) for Lexus GS 300 2004 List of elements for Anti-lock Brakes Wiring Diagram (2 of 3) for Lexus GS 300 2004: 44 (at left junction kick connector 6 panel) (behind left kick panel) (at left side of engine compt, behind ecu box) data link connector (dlc) 1 (behind left kick panel) (behind left side of dash) data link connector 3 (behind upper right side of dash) junction connector 17 (on brake pedal bracket) (or red) (short pin) Blvl Body ecu 2 Brake fluid level warning switch (in brake fluid reservoir) Driver side j/b Driver side j/b (behind left kick panel) Ecu-ig fuse 15a Ess Gs300 Gs430 Hot at all times Hot in on or start Ig (at left side of dash) Ig1 Ii (at right side of dash) Junction connector (behind left side of dash) Junction connector (in ecu box) Junction connector 3 & 4 (in ecu box) Junction connector 7 (behind left kick panel) Left front abs speed sensor (3.0l: at left front wheel) (4.3l: at left front wheel assembly) Master cylinder pressure sensor (at left rear corner of engine compartment) Mpx2 Nca Park/neutral position switch (on transmission) Pmc Pnk Red Right front abs speed sensor (3.0l: at right front wheel) (4.3l: at right front wheel assembly) Sil Ss1+ Ss1- Steering sensor (combination switch) Stop fuse 15a Stoplight switch Vcm Vsc off switch Vsc warning buzzer (behind left side of dash) Anti-lock Brakes Wiring Diagram (3 of 3) for Lexus GS 300 2004 List of elements for Anti-lock Brakes Wiring Diagram (3 of 3) for Lexus GS 300 2004: 67 (at left (behind left side of dash) junction connector 9 (behind upper right side of dash) junction connector 17 A20 A21 Abs & trac & vsc ecu (behind left side of dash) Abs deceleration sensor (under rear of center console) Abs ind Brake ind Brl C12 C13 Combination meter Cpu Csw D/g Driver side j/b (behind left kick panel) Eng+ Eng- Engine control module (at left side of engine compt, in ecu box) F13 Flo Gauge fuse 10a Ggnd Gl1 Gl2 Gnd3 Gnd4 Gss Gyaw Headlights system Hot in on or start Ig1 Ig2 Ign fuse 5a Ind Junction connector (behind left side of dash) Junction connector 6 (behind left kick panel) Kick Left rear abs speed sensor (at left rear wheel) Nca Neo Panel) Pnk Red Right rear abs speed sensor (at right rear wheel) Rl+ Rl- Rr+ Rr- Slip ind Sp1 Speedometer Ss1+ Ss1- Stp Trc+ Trc- Vgs Vsc ind Vsc off ind Vscw Vys Yaw Yaw rate sensor (under rear of center console) Yaw2 Yss
ANTI-THEFT Power Door Locks Wiring Diagram (1 of 3) for Lexus GS 300 2004 List of elements for Power Door Locks Wiring Diagram (1 of 3) for Lexus GS 300 2004: 55 (in dash harness, behind right side of glove box) Bdr Becu Body ecu 2 (in driver side j/b) Computer data lines system Cpub Cty Ctye D fr fuse 20a D rr door fuse 20a D22 D23 D24 Driver door ecu (in driver's door) Driver side j/b (behind left kick panel) Driver side side j/b (behind left kick panel) Ecu-ig fuse 15a Engine room r/b 1 (on right side of engine compt, behind strut tower) Exterior lights system F13 Gnd H10 H11 H13 Headlights system Hot at all times Hot in acc or on Hot in on or start Hrly If (at left kick panel) Ii (at right side of dash) Ile Interior lights system Junction connector 10 (behind left side of dash) Junction connector 13 (behind left side of dash) Junction connector 17 (behind upper right side of dash) Junction connector 6 (behind left kick panel) Junction connector 7 (behind left kick panel) Junction connector 8 (behind left kick panel) Kul Left door lock control switch (power window master switch) Left front door courtesy switch (on left "b" pillar) Left front door lock motor, door key lock & unlock switch & door lock detection switch (rear of left front door) Lock Lock detect Lsw Lswe Mpx1 Mpx2 Mul Pwe Radio 2 fuse 15a Sig Trly Unlk Power Door Locks Wiring Diagram (2 of 3) for Lexus GS 300 2004 List of elements for Power Door Locks Wiring Diagram (2 of 3) for Lexus GS 300 2004: 55 (at left rear quarterpanel) (rear center of luggage compartment) luggage compartment door courtesy switch & opener motor (rear center of luggage compt) luggage compartment door key unlock switch Ant1 Ant2 Batt Bdr Bj (at left rear floor partition panel) Bl (at right rear floor partition panel) Code Cpub Cty Ctye Diode (luggage compartment door open detection) (at left side of luggage compt) Eb (at middle of left inner fender panel) Ecu- b2 fuse 10a Ee (under abs/ trac/vsc actuator) Efi fuse 25a Efi relay Engine control module (at left side of engine compt, in ecu box) Engine hood courtesy switch (at front center of engine compt) Engine room r/b 1 (on right side of engine compt, behind strut tower) Gnd Hot at all times If (at left kick panel) Imld J/c 20 Junction connector 10 (behind left side of dash) Junction connector 11 (behind left side of dash) Junction connector 5 (in engine room r/b 2) Junction connector 6 Junction connector 9 (behind left side of dash) Key coil Ksw Left rear door courtesy switch (on left "c" pillar) Left rear door ecu (in left rear door) Left rear door lock motor & door lock detection switch (rear of left rear door) Lock detect Lsw Lswe Mpx1 Mpx2 Mrel Passenger side j/b (behind right kick panel) Power seat ecu (under driver's seat) Right rear door courtesy switch (on right "c" pillar) Right rear door ecu (in right rear door) Right rear door lock motor & door lock detection switch (rear of right rear door) Rxck Sig Transponder key amplifier (in steering column) Txct Unlock warning switch (behind left side of dash) W/ memory seats W/o memory seats Power Door Locks Wiring Diagram (3 of 3) for Lexus GS 300 2004 List of elements for Power Door Locks Wiring Diagram (3 of 3) for Lexus GS 300 2004: 68 (at right side of luggage compartment) wireless door lock control ecu (left rear corner of engine compt) wireless door lock buzzer Acc Bdr Becu Bm (at right rear quarterpanel) Body ecu 1 (in passenger side j/b) Bsub Bzr Bzr2 C12 Combi- nation meter Computer data lines system Cpub Cty Ctye Dle Dome fuse 10a Ecu- b3 fuse 20a Engine room r/b 1 (on right side of engine compt, behind strut tower) Exterior lights system F11 F12 F13 Front passenger door ecu (in right front door) Gnd H11 H13 Haz Hcty Horn Horns system Hot at all times If (at left kick panel) Ii (at right side of dash) Ind Junction connector 10 (behind left side of dash) Junction connector 14 (behind left side of dash) Junction connector 15 (behind left side of dash) Junction connector 17 (behind upper right side of dash) Junction connector 22 Junction connector 6 Kul Lgcy Lock Lock detect Lsw Lswe Mpx1 Mpx2 Mul P fr fuse 20a P rr door fuse 20a Passenger side j/b (behind right kick panel) Pnk Pws Rco Rda Rheostat (security indicator) Right door lock control switch Right front door courtesy switch (on right "b" pillar) Right front door lock motor, door key lock & unlock switch & door lock detection switch (rear of right front door) Rssi Sig Theft deterrent horn (at right front of engine compt) Tkul Tr+ Unlk
BODY CONTROL MODULES Body Control Modules Wiring Diagram (1 of 2) for Lexus GS 300 2004 List of elements for Body Control Modules Wiring Diagram (1 of 2) for Lexus GS 300 2004: 63 (behind left kick panel) junction connector 7 (in dash harness, behind instrument cluster) A/c control assembly (behind center of dash) A13 Acan Altl Anti-lock brakes system Auto Batt Becu Blvl Body ecu 2 (in driver side j/b) C13 C16 Center air bag sensor assembly (behind center of dash, forward of center console) Cltb Clte Clts Combination meter Dbkl Door locks system Driver side j/b (behind left kick panel) Ecu-ig fuse 15a Engine control module (at left side of engine compt, in ecu box) Exterior lights system Ffgo Ffog Gateway ecu (behind left side of dash) Gnd Gs430 H11 H13 Head Headlights system Hot in on or start Hrly I6 (in dash harness, behind right side of glove box) If (at left kick panel) Ile Instrument cluster system Interior lights system Junction connector 15 (behind left side of dash) Junction connector 6 (behind left kick panel) Junction connector 9 (behind left side of dash) Ksw Mirb Mire Mirrors system Mirs Mpd1 Mpd2 Mpx+ Mpx- Mpx1 Mpx2 Red Steering pad switch (combination switch) Stpi Tail Tilt & telescopic ecu (behind left side of dash) Trly Unlock warning switch (behind left side of dash) Warning system Body Control Modules Wiring Diagram (2 of 2) for Lexus GS 300 2004 List of elements for Body Control Modules Wiring Diagram (2 of 2) for Lexus GS 300 2004: 72 Acc Air conditioning system Anti-theft system Becu Body ecu 1 (in passenger side j/b) Bsub Bzr Bzr2 Computer data lines system Cpub D24 Defogger system Dfg Diode (luggage compt door open detection) (at left side of luggage compt) Door locks & anti-theft systems Door locks system Driver door ecu (in driver's door) Driver side j/b (behind left kick panel) Ecu-b2 fuse 10a Ecu-b3 fuse 20a Exterior lights system F11 F12 Front passenger door ecu (in right front door) Gnd Gs300 Gs430 H10 H11 H13 Haz Hcty Horn Horns system Hot at all times Hot in on or acc I6 (in dash harness, behind right side of glove box) Ii (at right side of dash) Ind Junction connector 13 (behind left side of dash) Junction connector 27 (behind left kick panel) Left rear door ecu (in left rear door) Lgcy Mirrors system Mpx1 Mpx2 Obd2 P19 Parking brake switch (behind left side of dash) Passenger side j/b (behind right kick panel) Pkb Pnk Power seat ecu (under driver's seat) Power tops system Power windows system Pwr Pws Radio 2 fuse 15a Rco Rda Ret Right rear door ecu (in right rear door) Rssi Seat Snow Tkul Tr+ Transmissions system Trunk, tailgate, fuel doors system Tsw W/ memory W/o memory
COMPUTER DATA LINES Data Link Connector Wiring Diagram for Lexus GS 300 2004 List of elements for Data Link Connector Wiring Diagram for Lexus GS 300 2004: 56 (behind left side of dash) j/c 11 (behind left side of dash) j/c 9 (behind right kick panel) passenger side j/b (gs300) (gs300: at rear of intake manifold) (gs430: on left cylinder head) ed (gs430) (in dash harness, behind left side of dash) (gs430) i9 (in engine harness, at left rear top of engine) e2 (on right cylinder head) ec (or red) +b1 b2 A20 A21 Abs & trac & vsc ecu (behind left side of dash) Abs sol relay Bat Body ecu 1 (in passenger side j/b) C12 C13 Center air bag sensor assembly (behind center of dash, forward of center console) Combination meter D/g Data link connector 1 (at left side of engine compt, behind ecu box) Data link connector 3 (behind left side of dash) Driver side j/b (behind left kick panel) Ed (gs 300: at rear of intake manifold) (gs 430: on left cylinder head) Engine control module (at left side of engine compt, in ecu box) Engine controls system Engine room r/b 2 (on left side of engine compt, behind strut tower) F13 Gs300 Gs430 Gs430 gs300 H12 Hot at all times Ig- Igniter 1 (left side of engine) Ii (at right side of dash) J/c 1 (in ecu box) J/c 10 (behind left side of dash) J/c 14 (behind left side of dash) J/c 2 (gs300) J/c 26 (in ecu box) J/c 3 & 4 (in ecu box) J/c 9 (gs430) (j/c 2: in ecu box) (j/c 9: behind left side of dash) Multi- display Nca Obd fuse 7.5a Obd2 Pnk Short pin Sil Tac Tach Wfse Wsfe High/Low Bus Wiring Diagram for Lexus GS 300 2004 List of elements for High/Low Bus Wiring Diagram for Lexus GS 300 2004: 44 (behind left kick panel) driver side j/b (behind right kick panel) passenger side j/b A/c control assembly (behind center of dash) A13 Body ecu 1 (in passenger side j/b) Body ecu 2 (in driver side j/b) C13 C16 Center air bag sensor assembly (behind center of dash, forward of center console) Combination meter D24 Driver door ecu (in driver's door) Engine control module (at left side of engine compt, in ecu box) F11 Front passenger door ecu (in right front door) Gateway ecu (behind left side of dash) Gs430 Gtx+ Gtx- H11 I1 (in dash harness, behind instrument cluster) Left rear door ecu (in left rear door) Moon roof control ecu (in front of moon roof opening) Mpd1 Mpd2 Mpx+ Mpx- Mpx1 Mpx2 Multi-display P19 Power seat ecu (under driver's seat) Radio & player Right rear door ecu (in right rear door) Steering pad switch (combination switch) Tilt & telescopic ecu (behind left side of dash) Tx+ Tx- Tx3+ Tx3- W/ memory W/ navigation W/o memory W/o navigation
COOLING FAN Cooling Fan Wiring Diagram for Lexus GS 300 2004 List of elements for Cooling Fan Wiring Diagram for Lexus GS 300 2004: 43 (gs 300) (gs 430) A/c comp relay A/c condenser fan motor (on front left side of radiator) A/c control assembly (behind center of dash) A/c single pressure switch (at upper left radiator support) A13 Acmg Air conditioning system Cds fan fuse 30a Driver side j/b (behind left kick panel) Eb (at middle of left inner fender panel) Ee (under abs & trac & vsc actuator) Engine control module (at left side of engine compt, in ecu box) Engine controls system Engine coolant temperature sensor (3.0l: on top left front of engine) (4.3l: on top right side of engine) Engine main relay Engine room r/b 1 (on right side of engine compt, behind strut tower) Engine room r/b 3 (on left side of engine compt, front of strut tower) Ethw Fan 1 relay Fan 2 relay Fan 3 relay Fan main fuse 50a Gs 300 Gs 430 Heater fuse 10a Hot at all times Hot in on or start Htr relay Ig (at left side of dash) Ign fuse 5a Junction connector 13 (behind left side of dash) Junction connector 14 (behind left side of dash) Junction connector 5 (in engine room r/b 2) Mpx+ Mpx2 Passenger side r/b (behind right kick panel) Radiator fan motor (at left front of engine compt) Rdi fan fuse 30a Red Thw Water temperature switch (at front of engine compt, behind left side of grille)
CRUISE CONTROL Cruise Control Wiring Diagram for Lexus GS 300 2004 List of elements for Cruise Control Wiring Diagram for Lexus GS 300 2004: 71 (at middle of left inner fender panel) eb (in ecu box) junction connector 3 & 4 (in engine harness, at left rear top of engine) A/t indicator light switch (park/neutral position switch) (on transmission) Accelerator pedal position sensor (on right rear side of engine) Batt C12 C13 C16 Cancel Ccs Cl+ Cl- Combination meter Combination switch Computer data lines system Cpu Cruise Cruise control switch Cruise ind Data link connector 1 (at left side of engine compt, behind ecu box) Driver side j/b (behind left kick panel) E01 E02 E03 Ec (at front of intake manifold) Ed (at rear of intake manifold) Ee (under abs & trac & vsc actuator) Efi fuse 25a Efi relay Engine control module (at left side of engine compt, in ecu box) Engine room r/b 1 (on right side of engine compt, behind strut tower) Eom Etcs fuse 15a Gauge fuse 10a Ge01 Hot at all times Hot in on or start If (at left kick panel) Ign fuse 5a Igsw Junction connector (behind left side of dash) Junction connector 1 (in ecu box) Junction connector 14 (behind left side of dash) Junction connector 17 (behind upper right side of dash) Junction connector 2 (in ecu box) Junction connector 3 (in ecu box) Junction connector 5 (in engine room r/b 2) Junction connector 6 (behind left kick panel) Junction connector 7 (behind left kick panel) Junction connector 9 (behind left side of dash) Me01 Mpx2 Mrel Pnk Res/ acc Set/ coast Shield Sp2+ Sp2- St1- Stop fuse 15a Stoplight switch (on brake pedal bracket) Stp Throttle control motor (on throttle body) Throttle position sensor (on throttle body) Vehicle speed sensor (electronically controlled transmission) (on transmission) Vpa Vpa2 Vta Vta2
DEFOGGERS Heated Mirrors Wiring Diagram for Lexus GS 300 2004 List of elements for Heated Mirrors Wiring Diagram for Lexus GS 300 2004: 28 (at right side of dash) ii (behind right kick panel) passenger side j/b A/c control assembly (behind center of dash) A13 Alt fuse 120a Body ecu 1 (in passenger side j/b) Dfg Driver side j/b (behind left kick panel) Engine control module (at left side of engine compt, in ecu box) Engine room r/b 1 (on right side of engine compt, behind strut tower) F13 Gnd H10 Heater fuse 10a Hot at all times Hot in on or start If (at left kick panel) Ii (at right side of dash) J/c 10 (behind left side of dash) J/c 13 (behind left side of dash) J/c 6 (behind left kick panel) Left remote control mirror heater Mir htr fuse 10a Mir relay Mpx+ Mpx1 Mpx2 Right remote control mirror heater Rear Defogger Wiring Diagram for Lexus GS 300 2004 List of elements for Rear Defogger Wiring Diagram for Lexus GS 300 2004: 23 A/c control assembly (behind center of dash) A13 Body ecu 1 (in passenger side j/b) Def relay Defog fuse 30a Dfg Driver side j/b (behind left kick panel) Engine control module (at left side of engine compt, in ecu box) Gnd Heater fuse 10a Hot at all times Hot in on or start Ii (at right side of dash) Junction connector 13 (behind left side of dash) Mpx+ Mpx1 Mpx2 Noise filter Noise filter (rear window defogger) (at left front corner of luggage compt) Passenger side j/b (behind right kick panel) Passenger side r/b (behind right kick panel) Rear window defogger Red
ELECTRONIC POWER STEERING Electronic Power Steering Wiring Diagram for Lexus GS 300 2004 List of elements for Electronic Power Steering Wiring Diagram for Lexus GS 300 2004: 23 C12 C13 Combination meter Cpu Driver side j/b (behind left kick panel) Ecu-ig fuse 15a F13 Gauge fuse 10a Gnd Hot in on or start If (at left kick panel) Ii (at right side of dash) J/c 10 (behind left side of dash) J/c 13 (behind left side of dash) J/c 17 (behind upper right side of dash) J/c 6 (behind left kick panel) J/c 7 (behind left kick panel) Pps ecu (behind left side of dash) Pps solenoid (3.0l: at left front of engine) (4.3l: at right front of engine) Sol+ Sol- Spd Speedometer Power Steering Column Wiring Diagram for Lexus GS 300 2004 List of elements for Power Steering Column Wiring Diagram for Lexus GS 300 2004: 52 (in dash harness, behind right side of glove box) i6 Acc Bdr Becu Body ecu 1 (in passenger side j/b) Body ecu 2 (in driver side j/b) Combination switch Computer data lines system Cpub D fr fuse 20a D22 D24 Driver door ecu (in driver's door) Driver side j/b (behind left kick panel) Ecu-b Ecu-b2 fuse 10a Ecu-ig fuse 15a Ecue Engine room r/b 1 (on right side of engine compt, behind strut tower) F11 F13 Gnd H10 H11 Hot at all times Hot in acc or run Hot in on or start If (at left kick panel) J/c 10 (behind left side of dash) J/c 13 (behind left side of dash) J/c 15 (behind left side of dash) J/c 6 (behind left kick panel) J/c 7 (behind left kick panel) Mpx1 Mpx2 Msw P p/seat fuse 30a Passenger side j/b (behind right kick panel) Power telescopic motor Power tilt motor Radio 2 fuse 15a Sig Telesco long Telesco short Tem+ Tem- Tilt & telescopic ecu (behind left side of dash) Tilt & telescopic switch Tilt down Tilt up Tim+ Tim-
ENGINE PERFORMANCE
3.0L 3.0L, Engine Performance Wiring Diagram (1 of 6) for Lexus GS 300 2004 List of elements for 3.0L, Engine Performance Wiring Diagram (1 of 6) for Lexus GS 300 2004: 67 (engine harn, at left rear top of engine) (in steering column) transponder key amplifier (middle of left inner fender panel) (right side of dash) +bm A/c system A/t shift main switch (integral to combination switch) Abs & trac & vsc ecu (behind left side of dash) Accelerator pedal position sensor (on right rear side of engine) Acmg Anti-theft system Anti-theft system (security indicator) Batt Braided C12 C13 Ccs Code Combination meter Computer data lines system Cpu Cruise control system Data link connector 3 (below left side of dash) Ect pwr Ect snow Eng+ Eng- Engine control module (ecm) (at left side of engine compt, in ecu box) Eom Fpc Ht1b Ht2b Igsw Imld J/c 9 (behind left side of dash) Ksw Mil ind Mpx1 Mpx2 Mrel Neo Ox1b Ox2b Pnk Pre Ptnk Red Rxck Sftd Sftu Sil Sta Sti- Stp Tachometer Tam Tbp Trc+ Trc- Txct Vapor pressure sensor (under left rear of vehicle) Vcc Vpa Vpa1 Vpa2 Wfse Wsfe 3.0L, Engine Performance Wiring Diagram (2 of 6) for Lexus GS 300 2004 List of elements for 3.0L, Engine Performance Wiring Diagram (2 of 6) for Lexus GS 300 2004: 28 (behind left kick panel) j/c 7 (behind upper right side of dash) j/c 17 B3 (body harn, in front of left rear wheelwell) Braided Data link connector 1 (behind ecu box) Driver side j/b (behind left kick panel) Ee (under abs & trac & vsc actuator) Efi fuse 25a Efi relay Engine room r/b 1 (on right side of engine compt, behind strut tower) Etcs fuse 15a Fp+ Fp- Fpc Fuel pump & sender (in fuel tank) Fuel pump control ecu (at left side of luggage compt) Gauge fuse 10a Hot at all times Hot in on or start Ig- J/c 11 (behind left side of dash) J/c 14 (behind left side of dash) J/c 20 (above left rear wheelwell) J/c 3, j/c 4 (in ecu box) Red Stop fuse 15a Stoplight switch Vsv (vapor pressure sensor) (under left rear of vehicle) 3.0L, Engine Performance Wiring Diagram (3 of 6) for Lexus GS 300 2004 List of elements for 3.0L, Engine Performance Wiring Diagram (3 of 6) for Lexus GS 300 2004: 40 (behind left side of dash) j/c 15 (generator) charging system (in ecu box) j/c 3, j/c 4 (on transmission) park/neutral position switch Acc Braided Driver side j/b (behind left kick panel) Ed (at rear of intake manifold) Engine control module (ecm) (at left side of engine compt, in ecu box) F10 Hot at all times Ht1a Ign fuse 5a Ignition switch Knk1 Knk2 Knock sensor 1 (on left front of engine) Knock sensor 2 (on left side of engine) Lock Mol Nco+ Nco- O/d direct clutch speed sensor (on transmission) Oil Ox1a P/n Pnk Red Sln+ Sln- Slt+ Slt- Slu+ Slu- Sp2+ Sp2- Start Starter fuse 5a Starting system (starter relay) Vehicle speed sensor (on transmission) 3.0L, Engine Performance Wiring Diagram (4 of 6) for Lexus GS 300 2004 List of elements for 3.0L, Engine Performance Wiring Diagram (4 of 6) for Lexus GS 300 2004: 27 (in ecu box) j/c 1 (in ecu box) j/c 3, j/c 4 (on left front of engine) engine oil level sensor (on transmission) a/t indicator light switch (integral to park/neutral position switch) (under center console, near selector lever) shift lock control ecu At4 Atl Braided Ec (at front of intake manifold) Ed (at rear of intake manifold) Electronically controlled transmission solenoid (in transmission) J/c 2 (in ecu box) J/c 3, j/c 4 (in ecu box) J/c 9 (behind left side of dash) Level Nssd Nssl Oil Pnk Red Sln+ Sln- Slt+ Slt- Slu+ Slu- Temp 3.0L, Engine Performance Wiring Diagram (5 of 6) for Lexus GS 300 2004 List of elements for 3.0L, Engine Performance Wiring Diagram (5 of 6) for Lexus GS 300 2004: 27 (in passenger side j/b) body ecu 1 Braided E2 (engine harn, left rear top of engine) E2g Ed (at rear of intake manifold) Electronically controlled transmission pattern select switch Engine coolant temperature sensor (on top left front of engine) Fuel inj 1 Fuel inj 2 Fuel inj 3 Fuel inj 4 Fuel inj 5 Fuel inj 6 Heated oxygen sensor (bank 1 sensor 1) (on right side of engine, in exhaust manifold) Heated oxygen sensor (bank 1 sensor 2) (on right side of engine, in exhaust manifold) Heated oxygen sensor (bank 2 sensor 1) (on exhaust system, near catalytic conv) Heated oxygen sensor (bank 2 sensor 2) (on exhaust system, near catalytic conv) Ii (at right side of dash) Mass airflow (maf) meter (on right side of engine compt, in air intake duct) Mpx1 Pwr Red Snow Tha Vsv (acis) (on left rear side of engine) Vsv (canister closed valve) (on right side of engine) Vsv (evap) (on top rear of engine) 3.0L, Engine Performance Wiring Diagram (6 of 6) for Lexus GS 300 2004 List of elements for 3.0L, Engine Performance Wiring Diagram (6 of 6) for Lexus GS 300 2004: 56 (at rear of intake manifold) (at top left front of engine) noise filter (ignition) (in ecu box) j/c 1 (on left rear of engine compt) igniter A/c system Acis Braided Camshaft position sensor (on top center rear of engine) Camshaft timing oil control valve (on top left side of engine) Ccv Cl+ Cl- Crankshaft position sensor (on right front of engine) E01 E02 E03 E2 (engine harn, at left rear top of engine) E3 (engine harn, in ecu box) Ec (at front of intake manifold) Ed (at rear of intake manifold) Engine control module (ecm) (at left side of engine compt, in ecu box) Evg Ge01 Gnd Ht2a Igf Ignition coil 1 Ignition coil 2 Ignition coil 3 Igt Igt2 Igt3 In1 In2 In3 Instrument cluster system Lcki Me01 Mops Ne+ Ne- Ocv+ Ocv- Oil pressure switch (on left front side of engine) Ox2a Power steering oil pressure sensor (at left front of engine) Prg Psp Red Tac Tha Throttle control motor (on throttle body) Throttle position sensor (on throttle body) Thw Vta Vta2
EXTERIOR LIGHTS Back-up Lamps Wiring Diagram for Lexus GS 300 2004 List of elements for Back-up Lamps Wiring Diagram for Lexus GS 300 2004: 19 (or red) Back-up light Back-up light switch Bk (at left rear quarterpanel) Driver side j/b (behind left kick panel) Gauge fuse 10a Gs300 Gs430 Hot in on or start Junction connector 1 (in ecu box) Junction connector 17 (behind upper right side of dash) Junction connector 19 (above left rear wheelwell) Junction connector 20 Junction connector 27 (behind left kick panel) Junction connector 3 & 4 (in ecu box) Left rear combination light Park/neutral position switch (on transmission) Red Right rear combination light Exterior Lamps Wiring Diagram (1 of 2) for Lexus GS 300 2004 List of elements for Exterior Lamps Wiring Diagram (1 of 2) for Lexus GS 300 2004: 63 (above left rear wheelwell) junction connector 19 (in driver's door) driver door ecu (on left "b" pillar) left front door courtesy switch Auto Automatic light control sensor (behind upper left side of dash) Bdr Becu Bk (at left rear quarterpanel) Body ecu 2 (in driver side j/b) Cltb Clte Clts Combination switch Computer data lines system Cpub Cty Ctye D fr fuse 20a D22 D23 D24 Driver side j/b (behind left kick panel) Ea (at middle of right inner fender panel) Eb (at middle of left inner fender panel) Ecu-b2 fuse 10a Ecu-ig fuse 15a Engine room r/b 1 (on right side of engine compt, behind strut tower) F13 Gnd H11 H13 Head Headlights system Hot at all times Hot in on or start Hrly I6 (in dash harness, behind right side of glove box) If (at left kick panel) Ii (at right side of dash) Junction connector 10 (behind left side of dash) Junction connector 14 (behind left side of dash) Junction connector 17 (behind upper right side of dash) Junction connector 19 (above left rear wheelwell) Junction connector 20 Junction connector 6 Junction connector 7 (behind left kick panel) Left front side marker light Left license plate light Left parking light Light control switch Mpx1 Mpx2 Off Passenger side j/b (behind right kick panel) Red Right front side marker light Right license plate light Right parking light Sig Stop fuse 15a Stop light switch (on brake pedal bracket) Tail Trly Exterior Lamps Wiring Diagram (2 of 2) for Lexus GS 300 2004 List of elements for Exterior Lamps Wiring Diagram (2 of 2) for Lexus GS 300 2004: 71 (above left rear wheelwell) junction connector 19 (at left front of luggage compt floor) b5 (behind left kick panel) driver side j/b (behind right kick panel) passenger side j/b (behind upper right side of dash) j/c 17 (canada) (combination switch) turn signal switch (in body harness, at top rear of left rear wheelwell) b4 Alt fuse 120a B11 Bk (at left rear quarterpanel) Body ecu 1 (in (passenger side j/b) Brake lts C12 C13 Combination meter Cpu D10 E11 Ea (at middle of right inner fender panel) Eb (at middle of left inner fender panel) Ehw Engine room r/b 1 (on right side of engine compt, behind strut tower) F13 Gauge fuse 10a Gnd Haz Hazard switch Hi mount High mounted stop light (w/ rear spoiler) High mounted stop light (w/o rear spoiler) Hot at all times Hot in on or start If (at left kick panel) Ii (at right side of dash) Instrument panel j/b (behind upper center of dash) J/c 10 (behind left side of dash) J/c 17 (behind upper right side of dash) J/c 6 Junction connector 12 (behind left side of dash) Junction connector 20 Left Left front turn signal light Left rear combination light (inner) Left rear combination light (outer) Left turn ind Light failure sensor (at left side of luggage compartment) Markr Mpx2 Noise filter (high mounted stop light) (near left "c" pillar) Power Rear light ind Right Right front turn signal light Right rear combination light (inner) Right rear combination light (outer) Right turn ind Side marker Srs-b fuse 5a (canada) Stop Stop sw Tail Tail fuse 10a Tail ind Tail lts Tail relay Taillt pwr Turn Turn signal flasher (behind left side of dash, near driver side j/b) Turn-haz fuse 10a Wrn
GROUND DISTRIBUTION Ground Distribution Wiring Diagram (1 of 4) for Lexus GS 300 2004 List of elements for Ground Distribution Wiring Diagram (1 of 4) for Lexus GS 300 2004: 52 (in dash harness, behind left side of dash) i9 (w/ hid) (w/o hid) A/c magnetic clutch & lock sensor Abs & trac & vsc actuator Abs sol relay Camshaft position sensor shield Crankshaft position sensor shield Cruise control switch Data link connector (dlc) 1 Data link connector (dlc) 3 Data link connector 3 shield E shield E1 (in engine harness, at front of engine) Ea (at middle of right inner fender panel) Ec (at front of intake manifold) Ed (at rear of intake manifold) Ee (under abs & trac & vsc actuator) Efi relay Engine control module Engine control module & heated oxygen sensor (bank 1 & sensor 2) shield Engine control module & heated oxygen sensor (bank 2 & sensor 2) shield Engine control module shield Engine main relay Engine oil level sensor Engine room r/b 1 (on right side of engine compt, behind strut tower) Engine room r/b 2 (on left side of engine compt, (behind strut tower) Eo1 Eo2 Eo3 Heated oxygen sensor (bank 1 & sensor 1) shield Heated oxygen sensor (bank 2 & sensor 1) shield I5 (in dash harness, behind center of glove box) Igniter Junction connector 2 (in ecu box) Junction connector 3 & 4 (in ecu box) Junction connector 5 (in engine room r/b 2) Junction connector 9 (behind left side of dash) Knock sensor 1 shield Knock sensor 2 shield Meo1 Right front fog- light Right front side marker light Right front turn signal light Right headlight control ecu Right low beam headlight Right parking light Shield Starter relay T13 Telephone switch Telephone transceiver & speaker relay Ground Distribution Wiring Diagram (2 of 4) for Lexus GS 300 2004 List of elements for Ground Distribution Wiring Diagram (2 of 4) for Lexus GS 300 2004: 61 (w/ hid) (w/o hid) A/c dual pressure switch A19 Abs & trac & vsc ecu C13 Center air bag sensor assembly Combination meter Combination switch D24 Data link connector (dlc) 3 Daytime running light relay 3 Daytime running light relay 4 Daytime running light resistor (or short connector) Dimmer switch Driver door ecu E4 (in engine harness, inside of ecu box) Eb (at middle of left inner fender panel) Engine control module Engine hood courtesy switch Eom Exhaust gas sensor Front wiper & washer switch Headlight beam level control ecu Headlight cleaner control relay Headlight cleaner motor I1 (in dash harness, behind instrument cluster) I11 (in dash harness, behind left side of dash) If (at left kick panel) Junction connector 10 (behind left side of dash) Junction connector 11 (behind left side of dash) Junction connector 6 (behind left kick panel) Key interlock solenoid Left front fog- light Left front side marker light Left front turn signal light Left head- light control ecu Left low beam headlight Left mirror heater Left parking light Light control switch Luggage compartment door opener switch Main daytime running light relay Pnk Pps ecu Radiator fan motor Seat heater switch Shield Steering sensor Telephone microphone Telephone microphone shield Telephone transceiver & speaker relay shield Tilt & telescopic ecu To driver side junction block (diagram 3 of 4) To passenger side junction block (diagram 3 of 4) Transponder key amplifier Turn signal flasher Turn signal switch Unlock warning switch Washer level warning switch Water temperature switch Ground Distribution Wiring Diagram (3 of 4) for Lexus GS 300 2004 List of elements for Ground Distribution Wiring Diagram (3 of 4) for Lexus GS 300 2004: 59 (except mark levinson) (in dash harness, behind right side of glove box) i6 (on left side of engine compt, front of strut tower) engine room r/b 3 A/c control assembly A13 A20 Abs & trac & vsc ecu Automatic cd changer B2 (in body harness, at top of right "a" pillar) Blower motor controller Body ecu 1 Body ecu 2 Brake fluid level warning switch C12 Center airbag sensor assembly Cigarette lighter Clock Combination meter Driver side j/b (behind left kick panel) Electronically controlled transmission pattern select switch F11 F13 Fan 2 relay Fan 3 relay From junction connector 6 (diagram 2 of 4) From junction connector j/c 10 (diagram 2 of 4) Front passenger door ecu Front wiper motor Garage door opener Gateway ecu Glove box light switch Hazard switch Htr relay I1 (in dash harness, behind instrument cluster) Ig (at left side of dash) Ig relay Ih (at right dash panel brace) Ii (at right side of dash) Inner mirror & compass Instrument panel j/b (behind upper center of dash) Junction connector 17 (behind upper right side of dash) Left rear interior light Left vanity light Mirror retraction switch Moon roof control ecu Moon roof control switch Multi- display Noise filter Passenger side j/b (behind right kick panel) Passenger side r/b (behind right kick panel) Personal light Power outlet Radio & player Right mirror heater Right rear interior light Right vanity light Shift lock control ecu Stereo component amplifier Vsc off switch Ground Distribution Wiring Diagram (4 of 4) for Lexus GS 300 2004 List of elements for Ground Distribution Wiring Diagram (4 of 4) for Lexus GS 300 2004: 54 (except mark levinson) navigation ecu (mark levinson) navigation ecu (mark levinson) stereo component amplifier (w/ memory) (w/o memory) Auto antenna control relay & motor B4 (in body harness, at top rear of left rear wheelwell) B6 (in body harness, in left front seat) Bj (at left rear floor partition panel) Bk (at left rear quarterpanel) Bl (at right rear floor partition panel) Bm (at right rear quarterpanel) Driver's power seat control switch Driver's power seat front vertical position sensor Driver's power seat rear vertical position sensor Driver's power seat recline position sensor Driver's power seat slide position sensor Driver's seat back heater Driver's seat lumbar support control switch Front passenger's power seat control switch Front passenger's seat back heater Front passenger's seat lumbar support control switch Fuel lid opener motor Fuel pump control ecu H23 H24 High mounted stop- light Junction connector 20 (above left rear wheelwell) Junction connector 22 (above right rear wheelwell) Junction connector 23 (under left front seat) Junction connector 24 (under right front seat) Junction connector 28 (right side of luggage compt) Led Left buckle switch Left license plate light Left rear combination light Left rear door ecu Light failure sensor Luggage compartment door key unlock switch P18 P19 Power seat ecu R10 R11 Right buckle switch & seat belt warning occupant detection sensor Right license plate light Right rear combination light Right rear door ecu S14 Spoiler w/o rear Stop- light noise filter Telephone transceiver & speaker relay W/ rear spoiler Wireless door lock control ecu
HEADLIGHTS Headlamps Wiring Diagram (1 of 2) for Lexus GS 300 2004 List of elements for Headlamps Wiring Diagram (1 of 2) for Lexus GS 300 2004: 63 (at middle of left inner fender panel) eb (in dash harness, behind instrument cluster) i1 (in driver's door) driver door ecu Altl Auto Automatic light control sensor (behind upper left side of dash) B10 Bdr Becu Body ecu 2 (in driver side j/b) Cltb Clte Clts Combination switch Cpub Cty Ctye D fr fuse 20a D22 D23 D24 Dimmer switch Driver side j/b (behind left kick panel) Ea (at middle of right inner fender panel) Ecu-b2 fuse 10a Ecu-ig fuse 15a Engine room r/b 1 (on right side of engine compt, behind strut tower) Exterior lights system Ffgo Ffog Flash Fog relay Foglight switch Fr fog fuse 15a Gauge fuse 10a Gnd H11 H13 Head High Hot at all times Hot in on or start Hrly I6 (in dash harness, behind right side of glove box) If (at left kick panel) Junction connector 10 (behind left side of dash) Junction connector 17 (behind upper right side of dash) Junction connector 6 (behind left kick panel) Junction connector 7 (behind left kick panel) Left front door courtesy switch (on left "b" pillar) Left front fog light Light control switch Low Mpx1 Mpx2 Off Passenger side j/b (behind right kick panel) Red Right front fog light Sig Srs-b fuse 5a Tail Trly Headlamps Wiring Diagram (2 of 2) for Lexus GS 300 2004 List of elements for Headlamps Wiring Diagram (2 of 2) for Lexus GS 300 2004: 47 (on right side of engine compt, behind strut tower) engine room r/b 1 C12 C13 Chg- Combination meter Daytime running light relay (main) (behind right end of dash) Daytime running light relay 3 & 4 (at left front corner of engine compt) Daytime running light resistor (usa) (on left side of left front strut tower) Dimmer drl 2 relay Drl Drl 1 fuse 30a Drl 2 fuse 30a E4 (in engine harness, inside of ecu box) Eb (at middle of left inner fender panel) Ecu-b2 fuse 10a Ee (under abs & trac & vsc actuator) Engine room r/b 1 (on right side of engine compt, behind strut tower) Engine room r/b 3 (on left side of engine compt, front of strut tower) Except hid Gs300 Gs430 Head ind (usa) Head lp relay Headlamps leveling circuit Hid High beam ind Hot at all times J/c 27 (behind left kick panel) Junction connector 11 (behind left side of dash) Junction connector 14 (behind left side of dash) Junction connector 15 (behind left side of dash) Junction connector 18 (behind right kick panel) Left high beam headlight Left low beam headlight left headlight control ecu (behind left headlight) Left lower head fuse 15a Left upper head fuse 15a Main fuse 40a Parking brake switch (behind left side of dash) Passenger side j/b (behind right kick panel) Pnk Red Right high beam headlight Right low beam headlight right headlight control ecu (behind right headlight) Right lower head fuse 15a Right upper head fuse 15a Rkb Short connector (canada) (on left side of left front strut tower) Headlamps Leveling Wiring Diagram for Lexus GS 300 2004 List of elements for Headlamps Leveling Wiring Diagram for Lexus GS 300 2004: 62 (at left kick panel) if (at middle of left inner fender panel) eb (behind left side of dash) junction connector 14 (in dash harness, behind right side of glove box) i6 Anti-lock brakes system Auto Automatic light control sensor (behind upper left side of dash) Becu Body ecu 2 (in driver side j/b) C12 Cltb Clte Clts Combination meter Combination switch Driver side j/b (behind left kick panel) Ecu-b2 fuse 10a Ecu-ig fuse 15a Exterior lights system Front height control sensor (forward of left front strut tower) Gauge fuse 10a Gnd H13 Hdlp Head Headlight beam level control ecu (at left front corner of engine compt) Headlight beam level control motor Headlight beam level control motor (behind right headlight assembly) Headlight beam level control warning indicator Headlights circuit Hot at all times Hot in on or start Hrly I1 (in dash harness, behind instrument cluster) If (at left kick panel) Junction connector 10 (behind left side of dash) Junction connector 6 Junction connector 7 (behind left kick panel) Lh1 Lh2 Lh3 Lh4 Lhb1 Light control switch Off Passenger side j/b (behind right kick panel) Rear height control sensor (under left rear of vehicle) Red Rh1 Rh2 Rh3 Rh4 Sbf Sbr Sgf Sgr Shf Shr Spdl Tail Trly Wng
HORN Horn Wiring Diagram for Lexus GS 300 2004 List of elements for Horn Wiring Diagram for Lexus GS 300 2004: 12 Body ecu 1 (in passenger side j/b) Combination switch Engine room r/b 1 (on right side of engine compt, behind strut tower) Engine room r/b 2 (on left side of engine compt, behind strut tower) Horn Horn switch Horn fuse 10a Horn relay Hot at all times Junction connector 18 (behind right kick panel) Left horn (in front of radiator) Right horn (in front of radiator)
INSTRUMENT CLUSTER
INTERIOR LIGHTS Courtesy Lamps Wiring Diagram (1 of 3) for Lexus GS 300 2004 List of elements for Courtesy Lamps Wiring Diagram (1 of 3) for Lexus GS 300 2004: 55 (in dash harness, behind right side of glove box) i6 B2 (in body harness, at top of right "a" pillar) Bdr Becu Body ecu 2 (in driver side j/b) Computer data lines system Cpub Cty Ctyb Ctye Cyl D fr fuse 20a D rr door fuse 20a D22 D23 D24 Door Driver door ecu (in driver's door) Driver side j/b (behind left kick panel) Ecu-ig fuse 15a Engine room r/b 1 (on right side of engine compt, behind strut tower) Exterior lights system F13 Gnd H10 H11 H13 Headlights system Hot at all times Hot in on or acc Hot in on or start Hrly I1 (in dash harness, behind instrument cluster) If (at left kick panel) Ignition key cylinder light Ii (at right side of dash) Ile Junction connector 10 (behind left side of dash) Junction connector 13 (behind left side of dash) Junction connector 17 (behind upper right side of dash) Junction connector 6 Junction connector 7 (behind left kick panel) Junction connector 8 (behind left kick panel) Left front door courtesy light Left front door courtesy switch (on left "b" pillar) Left step light Mpx1 Mpx2 On off Passenger side j/b (behind right kick panel) Personal light Radio 2 fuse 15a Right step light Sig Trly Courtesy Lamps Wiring Diagram (2 of 3) for Lexus GS 300 2004 List of elements for Courtesy Lamps Wiring Diagram (2 of 3) for Lexus GS 300 2004: 39 (in dash harness, behind instrument cluster) B2 (in body harness, at top of right "a" pillar) Bdr Bj (at left rear floor partition panel) Bk (at left rear quarterpanel) Bl (at right rear floor partition panel) Cpub Cty Ctyb Ctye Cyl Diode (luggage compartment door open detection) (at left side of luggage compt) Ecu-b2 fuse 10a Gnd Hot at all times Junction connector 20 Left rear door courtesy light Left rear door courtesy switch Left rear door ecu (in left rear door) Left rear interior light Left vanity light Luggage compartment door courtesy switch (rear center of luggage compt) Luggage compartment light Mpx1 Mpx2 Noise filter (stoplight) (at left front corner of luggage compt) P19 Passenger side j/b (behind right kick panel) Power seat ecu (under driver's seat) Red Right rear door courtesy light Right rear door courtesy switch Right rear door ecu (in right rear door) Right rear interior light Right vanity light Rrlp Sig W/ memory seats W/o memory seats Courtesy Lamps Wiring Diagram (3 of 3) for Lexus GS 300 2004 List of elements for Courtesy Lamps Wiring Diagram (3 of 3) for Lexus GS 300 2004: 41 (at right side of luggage compt) wireless door lock control ecu (left rear corner of engine compt) wireless door lock buzzer Acc Bdr Becu Bm (at right rear quarterpanel) Body ecu 1 (in passenger side j/b) Bzr Bzr2 Computer data lines system Cpub Cty Ctyb Ctye Cyl Dome fuse 10a Engine room r/b 1 (on right side of engine compt, behind strut tower) F11 F12 F13 Front passenger door ecu (in right front door) Gnd H11 H12 Hot at all times Ii (at right side of dash) Junction connector 15 (behind left side of dash) Junction connector 17 (behind upper right side of dash) Junction connector 22 Mpx1 Mpx2 P fr fuse 20a P rr door fuse 20a Passenger side j/b (behind right kick panel) Pnk Rco Rda Right front door courtesy light Right front door courtesy switch (on left "b" pillar) Rssi Sig Instrument Illumination Wiring Diagram for Lexus GS 300 2004 List of elements for Instrument Illumination Wiring Diagram for Lexus GS 300 2004: 47 (at right side of dash) ii A/c control assembly (behind center of dash) A/t shift position illumination A13 Anti-theft system Bj (at left rear floor partition panel) Bl (at right rear floor partition panel) Body ecu 2 (in driver side j/b) C12 Cigarette lighter Combination meter Cpu Driver side j/b (behind left kick panel) Electronically controlled transmission pattern select switch Glove box light Glove box light switch Gnd H13 Hazard switch Head Headlight cleaner switch (canada) Hot at all times I1 (in dash harness, behind instrument cluster) If (at left kick panel) Instrument panel j/b (behind upper center of dash) Junction connector 13 (behind left side of dash) Junction connector 16 (behind center of dash) Junction connector 17 (behind upper right side of dash) Junction connector 6 Left rear ashtray illumination Left rear door ecu (in left rear door) Light control switch (combination switch) Mirror retraction switch Multi-display Off Panel fuse 7.5a Radio & player Remote control mirror switch Rheostat (security indicator light) Right rear ashtray illumination Right rear door ecu (in right rear door) Seat heater switch Tail Tail relay Trly Vsc off switch Whe1
MEMORY SYSTEMS Memory Systems Wiring Diagram (1 of 2) for Lexus GS 300 2004 List of elements for Memory Systems Wiring Diagram (1 of 2) for Lexus GS 300 2004: 79 (behind left kick panel) j/c 8 (behind left side of dash) j/c 13 Acc Bdr Becu Body ecu 1 (in passenger side j/b) Body ecu 2 (in driver side j/b) Bsub Com Computer data lines system Cpub D fr fuse 20a D22 D23 D24 De2 Dm+r Dmhr Dmvr Down Driver door ecu (in driver's door) Driver side j/b (behind left kick panel) Driving position memory switch Dvc Ecu-b3 fuse 20a Ecu-ig fuse 15a Engine room r/b 1 (on right side of engine compt, behind strut tower) F11 F12 F13 Front passenger door ecu (in right front door) Gnd H10 H11 Hot at all times Hot in on or acc Hot in on or start Hsr Hssr I6 (in dash harness, behind right side of glove box) If (at left kick panel) Ii (at right side of dash) Interior lights system J/c 10 (behind left side of dash) J/c 15 (behind left side of dash) J/c 17 (behind upper right side of dash) J/c 6 (behind left kick panel) J/c 7 (behind left kick panel) Left Left remote control mirror Mem 1 Mem 2 Mirb Mire Mirror retraction switch (gs 300) Mirs Mpx1 Mpx2 Mswe Operation switch P fr fuse 20a Passenger side j/b (behind right kick panel) Pe2 Pm+r Pmhr Pmvr Pnk Pvc Radio 2 fuse 15a Red Remote control mirror switch Ret Right Right remote control mirror Select switch Set Sig Vsr Vssr Memory Systems Wiring Diagram (2 of 2) for Lexus GS 300 2004 List of elements for Memory Systems Wiring Diagram (2 of 2) for Lexus GS 300 2004: 76 (behind left side of dash) j/c 10 (in body harness, in left front seat) b6 Bj (at left rear floor partition panel) Bk (at left rear quarterpanel) C15 Computer data lines system D p/seat fuse 30a Down Driver side j/b (behind left kick panel) Driver's power seat control switch Driver's seat lumbar support control motor (in driver's seat) Ecu-b Ecu-b2 fuse 10a Ecue Fdwn Front Frv+ Frv- Fup Gnd Hot at all times I7 (in dash harness, behind right kick panel) If (at left kick j/c 6 (behind left kick panel) J/c 18 (behind right kick panel) J/c 20 (above left rear wheelwell) J/c 23 (under left front seat) Ldwn Lft+ Lft- Lumbar support control switch (driver's seat) Lup Mpx1 Mpx2 Msw P p/seat fuse 30a P18 P19 Panel) Passenger side j/b (behind right kick panel) Power seat ecu (under driver's seat) Power seat motor (driver's seat front vertical) (under driver's seat) Power seat motor (driver's seat rear vertical) (under driver's seat) Power seat motor (driver's seat reclining) (under driver's seat) Power seat motor (driver's seat slide control) (under driver's seat) Power seat position sensor (driver's seat front vertical control) (under driver's seat) Power seat position sensor (driver's seat rear vertical control) (under driver's seat) Power seat position sensor (driver's seat reclining control) (under driver's seat) Power seat position sensor (driver's seat slide control) (under driver's seat) Power telescopic motor Power tilt motor Pvcc Rcl+ Rcl- Rclf Rclr Rear Sgnd Sld+ Sld- Sldf Sldr Ssfv Ssrl Ssrr Ssrs Sysb Tel lng Tel shrt Tem+ Tem- Tilt & telescopic ecu (behind left side of dash) Tilt & telescopic switch (combination switch) Tilt down Tilt up Tim+ Tim-
NAVIGATION Navigation Wiring Diagram for Lexus GS 300 2004 List of elements for Navigation Wiring Diagram for Lexus GS 300 2004: 68 (except mark levinson) (except mark levinson) tweeter (in dash harness, behind left side of glove box) i4 (in dash harness, right of center air vents) i3 (mark levinson) +b1 Acan Acc Aui+ Aui- Auo+ Auo- Bm (at right rear quarterpanel) Body ecu 2 (in driver side j/b) Computer data lines system Driver side j/b (behind left kick panel) Except mark levinson Exterior lights system Fl+ Fl- Gateway ecu (behind left side of dash) Gauge fuse 10a Gnd Gnd1 Gs300 Gs430 Gtx+ Gtx- Harness, behind instrument cluster) Hot at all times Hot in acc or on Hot in on or start I10 (in dash harness, behind left side of instrument cluster) I12 (in dash harness, behind right side of instrument cluster) Ih (at right dash panel brace) Instrument cluster system Instrument panel j/b (behind upper center of dash) J/c 13 (behind left side of dash) J/c 22 (above right rear wheelwell) J/c 27 (behind left kick panel) J/c 28 (right side of luggage compt) Left front door speaker Mark levinson Multi-display Mute N-mu Navigation ecu (at right rear corner of luggage compt) Nca Parking brake switch (behind left side of dash) Passenger side j/b (behind right kick panel) Pkb Pnk Radio & player Radio 2 fuse 15a Red Rev S14 S15 Spd Stereo component amplifier (mark levinson: at right rear corner of luggage compt) (except mark levinson: behind right side of dash) Sync Tv fuse 15a Tx+ Tx- Tx1+ Tx1- Tx3+ Tx3-
PASSIVE RESTRAINTS Passive Restraints Wiring Diagram for Lexus GS 300 2004 List of elements for Passive Restraints Wiring Diagram for Lexus GS 300 2004: 16 Bj (at left rear floor partition panel) Bl (at right rear floor partition panel) Driver side j/b (behind left kick panel) Ecu-ig fuse 15a F11 Hot in run or start J/c 15 (behind left side of dash) J/c 23 (under left front seat) J/c 24 (under right front seat) J/c 7 (behind left kick panel) J/c 8 (behind left kick panel) Left buckle switch (in left front seat belt buckle) Left tension reducer solenoid (at base of left "b" pillar) Passenger side j/b (behind right kick panel) Right buckle switch (in right front seat belt buckle) Right tension reducer solenoid (at base of right "b" pillar)
POWER ANTENNA Power Antenna Wiring Diagram for Lexus GS 300 2004 List of elements for Power Antenna Wiring Diagram for Lexus GS 300 2004: 22 (at right side of luggage compartment) Ant Anta Antb Auto antenna control relay & motor Auto antenna motor Bm (at right rear quarterpanel) Dome fuse 10a Driver side j/b (behind left kick panel) Ecu-ig fuse 15a F11 H10 Hot at all times Hot in acc or on Hot in on or start J/c 13 (behind left side of dash) J/c 15 (behind left side of dash) J/c 22 J/c 7 (behind left kick panel) Passenger side j/b (behind right kick panel) Radio & player Radio 2 fuse 15a
POWER DISTRIBUTION Power Distribution Wiring Diagram (1 of 2) for Lexus GS 300 2004 List of elements for Power Distribution Wiring Diagram (1 of 2) for Lexus GS 300 2004: 68 (behind right kick panel) passenger side j/b (on right side of engine compt, behind strut tower) engine room r/b 1 Abs 1 fuse 60a Abs 2 fuse 40a Air conditioning system Alt fuse 120a Alt-s fuse 5a Am2 fuse 15a Anti-lock brakes system Battery Body ecu 1 Cellular phones system D fr fuse 20a Defog fuse 30a Defogger system Dome fuse 10a Drl 2 fuse 30a Ecu- b3 fuse 20a Ecu-b1 fuse 20a Ecu-b2 fuse 10a Efi fuse 25a Engine controls & cruise control system Engine controls, transmissions & cruise control systems Engine main relay Etcs fuse 15a Exterior lights system Fan main fuse 50a From engine a H-lp cln fuse 30a H12 Head lp relay Headlights system Heater fuse 50a Horn fuse 10a Horns system Ig relay Instrument cluster, air conditioning, headlights, interior lights, memory, power windows & door locks systems Instrument cluster, interior lights & sound systems Interior lights system Interior lights, door locks & power windows systems Interior lights, door locks, power antenna & power windows systems Interior lights, seats, power windows, mirrors, door locks & anti-theft systems Interior lights, warning, seats, power windows, mirrors, door locks & anti-theft systems Main fuse 40a Memory system Mir relay Navigation system Noise filter P fr fuse 20a P p/ seat fuse 30a P rr door fuse 20a Power tops system Radio 1 fuse 30a Red Room r/b 1 (diagram 1 of 2) S/roof fuse 25a Seats system Sound systems Starter Starter relay Starting/ charging system Tel fuse 15a To driver side j/b (diagram 2 of 2) To engine room r/b 1 (diagram 1 of 2) To ignition switch (diagram 2 of 2) Turn/ haz fuse 10a Tv fuse 15a Wiper/ washer system Power Distribution Wiring Diagram (2 of 2) for Lexus GS 300 2004 List of elements for Power Distribution Wiring Diagram (2 of 2) for Lexus GS 300 2004: 59 (behind left kick panel) driver side j/b Acc Am1 fuse 40a Anti-lock brakes, engine controls, cooling fans, cruise control & transmissions systems Anti-lock brakes, instrument cluster, engine controls, exterior lights, starting/charging, cruise control, transmissions, navigation, warning, electronic power steering, sound & wiper/washer systems Anti-lock brakes, warning, cellular phones, door locks, power windows, headlights, power tops, mirrors, electronic power steering, seats, power antenna, passive restraints, interior lights, body computer & memory systems Body computer, power antenna, interior lights, warning, memory, power windows, mirrors, exterior lights & cellular phones systems Body ecu 2 Cig fuse 15a Cigarette lighter Computer data lines system D p/seat fuse 30a D rr door fuse 20a Defogger & air conditioning systems Door locks, power windows, passive restraints, interior lights, body computer & memory systems E11 Ecu-ig fuse 15a Engine controls system Exterior lights system F10 Fog relay Fr fog fuse 15a From am2 fuse, engine room r/b 1 (diagram 1 of 2) From engine room r/b 1 c (diagram 1 of 2) Fuel opn fuse 10a Gauge fuse 10a H10 H12 Heater fuse 10a Ign fuse 5a Ignition switch Ii (at right side of dash) Instrument cluster, air conditioning, Interior lights system Interior lights, power windows & door locks systems J/c 12 (behind left side of dash) J/c 15 (behind left side of dash) J/c 17 (behind upper right side of dash) Lock Navigation & warning systems Obd fuse 7.5a Off Panel fuse 7.5a Pnk Power outlet Radio 2 fuse 15a Seats & memory systems Srs-b fuse 5a Start Starter fuse 5a Starting/ charging, engine controls systems Stop fuse 15a Tail fuse 10a Tail relay Transmissions, cruise control, anti-lock brakes, engine controls & exterior lights systems Trunk, tailgate, fuel doors system Washer fuse 20a Wiper fuse 25a Wiper/ washer system
POWER MIRRORS Electrochromic Mirror Wiring Diagram for Lexus GS 300 2004 List of elements for Electrochromic Mirror Wiring Diagram for Lexus GS 300 2004: 16 (at right side of dash) ii (behind left side of dash) j/c 15 D10 Driver side j/b (behind left kick panel) Ec+ Ec- Ecu-ig fuse 15a F11 Gnd Hot in on or start I6 (in dash harness, behind right side of glove box) Inner mirror & compass J/c 7 (behind left kick panel) Left remote control mirror Passenger side j/b (behind right kick panel) Right remote control mirror Power Mirrors Wiring Diagram for Lexus GS 300 2004 List of elements for Power Mirrors Wiring Diagram for Lexus GS 300 2004: 73 (behind left side of dash) j/c 13 (in dash harness, behind right side of glove box) i6 (in right front door) front passenger door ecu Acc Bdr Becu Body ecu 1 (in passenger side j/b) Body ecu 2 (in driver side j/b) Bsub Computer data lines system Cpub D fr fuse 20a D22 D23 D24 De2 Defogger system Dm+r Dmhr Dmvr Down Driver door ecu (in driver's door) Driver side j/b (behind left kick panel) Dvc Ecu-b2 fuse 10a Ecu-b3 fuse 20a Ecu-ig fuse 15a Electrochromic mirror circuit Engine room r/b 1 (on right side of engine compt, behind strut tower) F11 F12 F13 Gnd H10 H11 Hot at all times Hot in on or acc Hot in on or start Hssr I6 (in dash harness, behind right side of glove box) If (at left kick panel) Ii (at right side of dash) Interior lights system J/c 10 (behind left side of dash) J/c 15 (behind left side of dash) J/c 17 (behind upper right side of dash) J/c 6 J/c 7 (behind left kick panel) Left Left remote control mirror Mirb Mire Mirror retraction switch Mirs Mpx1 Mpx2 Operation switch P fr fuse 20a Passenger side j/b (behind right kick panel) Pe2 Pm+r Pmhr Pmvr Pvc Radio 2 fuse 15a Red Remote control mirror switch Ret Right Right remote control mirror Select switch Sig Vssr
POWER SEATS Driver Seat Wiring Diagram for Lexus GS 300 2004 List of elements for Driver Seat Wiring Diagram for Lexus GS 300 2004: 20 Bj (at left rear floor partition panel) D p/seat fuse 30a Down Driver side j/b (behind left kick panel) Driver's power seat control switch Front Hot at all times J/c 23 (under left front seat) Lumbar support control switch (driver's seat) Power seat motor (driver's seat front vertical control) (under driver's seat) Power seat motor (driver's seat lumbar support control) (in driver's seat) Power seat motor (driver's seat rear vertical control) (under driver's seat) Power seat motor (driver's seat reclining control) (under driver's seat) Power seat motor (driver's seat slide control) (under driver's seat) Rear Reclining Slide Support lumbar Vertical front Vertical rear Heated Seats Wiring Diagram for Lexus GS 300 2004 List of elements for Heated Seats Wiring Diagram for Lexus GS 300 2004: 28 Alt fuse 120a Bj (at left rear floor partition panel) Bl (at right rear floor partition panel) Driver side j/b (behind left kick panel) Ecu-ig fuse 15a Engine room r/b 1 (on right side of engine compt, behind strut tower) Hot at all times Hot in on or start If (at left kick panel) Ignition relay Ii (at right side of dash) Interior lights system J/c 10 (behind left side of dash) J/c 11 (behind left side of dash) J/c 15 (behind left side of dash) J/c 23 (under left front seat) J/c 24 (under right front seat) J/c 6 (behind left kick panel) J/c 7 (behind left kick panel) Left Passenger side j/b (behind right kick panel) Right Seat heater (driver's seat back) (in driver's seat back) Seat heater (driver's seat cushion) (in driver's seat cushion) Seat heater (front passenger's seat back) (in right front seat back) Seat heater (front passenger's seat cushion) (in right front seat cushion) Seat heater switch Seat htr fuse 20a Passenger Seat Wiring Diagram for Lexus GS 300 2004 List of elements for Passenger Seat Wiring Diagram for Lexus GS 300 2004: 20 Bl (at right rear floor partition panel) Down Front Front passenger's power seat control switch Hot at all times J/c 24 (under right front seat) Lumbar support control switch (front passenger's seat) P p/seat fuse 30a Passenger side j/b (behind right kick panel) Power seat motor (front passenger's seat front vertical control) (under right front seat) Power seat motor (front passenger's seat lumbar support control) (in right front seat) Power seat motor (front passenger's seat rear vertical control) (in right front seat) Power seat motor (front passenger's seat reclining control) (in right front seat) Power seat motor (front passenger's seat slide control) (under right front seat) Rear Reclining Slide Support lumbar Vertical front Vertical rear
POWER TOP/SUNROOF Power Top/Sunroof Wiring Diagram for Lexus GS 300 2004 List of elements for Power Top/Sunroof Wiring Diagram for Lexus GS 300 2004: 23 Body ecu 1 Close Down Driver side j/b (behind left kick panel) Ecu-ig fuse 15a F11 F13 Hot at all times Hot in on or start If (at left kick panel) Ign J/c 10 (behind left side of dash) J/c 15 (behind left side of dash) J/c 6 (behind left kick panel) J/c 7 (behind left kick panel) Moon roof control ecu (in front of moon roof opening) Moon roof control switch Mpx1 Mpx2 Open Passenger side j/b (behind right kick panel) Pnk S/roof fuse 25a
POWER WINDOWS Power Windows Wiring Diagram (1 of 3) for Lexus GS 300 2004 List of elements for Power Windows Wiring Diagram (1 of 3) for Lexus GS 300 2004: 59 (in dash harness, behind right side of glove box) i6 Auto Bdr Becu Body ecu 2 (in driver side j/b) Computer data lines system Cpub Cty Ctye D fr fuse 20a D rr door fuse 20a D22 D23 D24 Down Driver door ecu (in driver's door) Driver side j/b (behind left kick panel) Dt1 Dt2 Dt3 Ecu-ig fuse 15a Engine room r/b 1 (on right side of engine compt, behind strut tower) Gnd H10 H11 Hot at all times Hot in on or acc Hot in on or start If (at left kick panel) J/b 13 (behind left side of dash) J/b 7 (behind left kick panel) J/c 10 (behind left side of dash) J/c 6 (behind left kick panel) J/c 8 (behind left kick panel) Kul Left front door key lock & unlock switch (rear of left front door) Lmt Lock Lswe Mdn Mpx1 Mpx2 Mup Pls Power window master switch Pwe Pws Radio 2 fuse 15a Red Sc1 Sc2 Sc3 Sgnd Sig Unlk W/l W/l2 Window lock switch Wlsw Power Windows Wiring Diagram (2 of 3) for Lexus GS 300 2004 List of elements for Power Windows Wiring Diagram (2 of 3) for Lexus GS 300 2004: 36 (in left front door) left front power window motor (on left "b" pillar) left front door courtesy switch Auto Auto down Auto up Bdr Bj (at left rear floor partition panel) Bl (at right rear floor partition panel) Cpub E10 Ecu-b2 fuse 10a Gnd Hot at all times J/c 13 (behind left side of dash) Left rear door ecu (in left rear door) Left rear power window control switch Left rear power window motor Lmt Mdn Mpx1 Mpx2 Mup Passenger side j/b (behind right kick panel) Pct1 Pcto Pls Power seat ecu (under driver's seat) Pwe Red Right rear door ecu (in right rear door) Right rear power window control switch Right rear power window motor Sgnd Sig W/ memory seats W/o memory seats Power Windows Wiring Diagram (3 of 3) for Lexus GS 300 2004 List of elements for Power Windows Wiring Diagram (3 of 3) for Lexus GS 300 2004: 56 (at right side of luggage compartment) wireless door lock control ecu (in right front door) right front power window motor (on right "b" pillar) right front door courtesy switch Acc Auto Auto down Auto up Bdr Becu Bm (at right rear quarterpanel) Body ecu 1 (in passenger side j/b) Bsub Computer data lines system Cpub Cty Ctye Dome fuse 10a Ecu-b3 fuse 20a Engine room r/b 1 (on right side of engine compt, behind strut tower) F11 F12 F13 Front passenger door ecu (in right front door) Gnd H11 Hot at all times If (at left kick panel) Ii (at right side of dash) J/c 10 (behind left side of dash) J/c 15 (behind left side of dash) J/c 22 (above right rear wheelwell) J/c 6 (behind left kick panel) Kul Lmt Lock Lswe Mdn Mpx1 Mpx2 Mup P fr fuse 20a P rr door fuse 20a Passenger side j/b (behind right kick panel) Pls Pnk Pwe Pws Rco Rda Red Right front door key lock & unlock switch (rear of right front door) Right front power window control switch Rssi Sgnd Sig Unlk
RADIO Radio Wiring Diagram, with Mark Levinson (1 of 2) for Lexus GS 300 2004 List of elements for Radio Wiring Diagram, with Mark Levinson (1 of 2) for Lexus GS 300 2004: 42 (or pnk) Acc Ant Ant b C13 Combination meter Dome fuse 10a Driver side j/b (behind left kick panel) Engine room r/b 1 (on right side of engine compt, behind strut tower) F11 Gateway ecu (behind left side of dash) Gnd Gtx+ Gtx- H12 Hot at all times Hot in acc or on Ih (at right dash panel brace) Ill Instrument panel j/b (behind upper center of dash) Interior lights system J/c 13 (behind left side of dash) J/c 18 (behind right kick panel) J/c 28 (right side of luggage compt) Multi-display Mute Navigation Nca Passenger side j/b (behind right kick panel) Pnk Power antenna system Radio & player Radio 1 fuse 30a Radio 2 fuse 15a Red Tx+ Tx- Tx1+ Tx1- Tx2+ Tx2- W/o Radio Wiring Diagram, with Mark Levinson (2 of 2) for Lexus GS 300 2004 List of elements for Radio Wiring Diagram, with Mark Levinson (2 of 2) for Lexus GS 300 2004: 66 (above right rear wheelwell) j/c 22 (or pnk) +b1 +b2 Acc Aui+ Aui- Auo+ Auo- Bm (at right rear quarterpanel) Bus+ Bus- Cd automatic changer Cdl+ Cdl- Cdr+ Cdr- Center speaker Csr+ Csr- Fl+ Fl- Fr+ Fr- Gnd Gnd4 Gnd5 Ih (at right dash panel brace) J/c 21 (above right rear wheelwell) Left front door speaker Left rear door speaker Mute N-mu Navigation ecu (at right rear corner of luggage compartment) Nca Pnk Red Right front door speaker Right rear door speaker Rl+ Rl- Rr+ Rr- S14 S15 S16 Sgd4 Sgnd Sp+ Sp- Spd Speaker Spi+ Spi- Stereo component amplifier (at right rear corner of luggage compt) T13 Telephone transceiver & speaker relay (at right side of luggage compartment) Tmlt Tweeter Txm+ Txm- W/ navigation W/o navigation Wf+ Wf- Woofer speaker Radio Wiring Diagram, without Mark Levinson for Lexus GS 300 2004 List of elements for Radio Wiring Diagram, without Mark Levinson for Lexus GS 300 2004: 83 (or pnk) Acc Ant Ant b Aui+ Aui- Auo+ Auo- Bus+ Bus- Cd automatic changer Cdl+ Cdl- Cdr+ Cdr- Dome fuse 10a Driver side j/b (behind left kick panel) Engine room r/b 1 (on right side of engine compt, behind strut tower) F11 Fl+ Fl- Fr+ Fr- Gateway ecu (behind left side of dash) Gnd Gtx+ Gtx- H12 Hot at all times Hot in acc or on Ih (at right dash panel brace) Ill Instrument panel j/b (behind upper center of dash) Interior lights system J/c 18 (behind right kick panel) Left front door speaker Left rear door speaker Multi-display Mute N-mu Navigation Navigation ecu (at right rear corner of luggage compartment) Nca Passenger side j/b (behind right kick panel) Pnk Power antenna system Radio & player Radio 1 fuse 30a Radio 2 fuse 15a Red Right front door speaker Right rear door speaker Rl+ Rl- Rr+ Rr- S10 Sgd4 Sgnd Sp+ Sp- Speaker Spi+ Spi- Stereo component amplifier (behind right side of dash) T13 Telephone transceiver & speaker relay (at right side of luggage compt) Tlmt Tweeter Tx+ Tx- Tx1+ Tx1- Tx2+ Tx2- Txm+ Txm- W/ navigation W/o W/o navigation Wf+ Wf- Woofer speaker
SHIFT INTERLOCK Shift Interlock Wiring Diagram for Lexus GS 300 2004 List of elements for Shift Interlock Wiring Diagram for Lexus GS 300 2004: 23 (at right side of dash) A/t indictor light switch (park/neutral position switch) (on transmission) Acc At4 Atl Driver side j/b (behind left kick panel) Engine control module (at left side of engine compt, in ecu box) Gauge fuse 10a H10 Hot in acc or on Hot in on or start If (at left kick panel) Junction connector (in ecu box) Junction connector 13 (behind left side of dash) Junction connector 17 (behind upper right side of dash) Junction connector 3 & 4 (in ecu box) Junction connector 6 Kls+ Nssd Nssl Radio 2 fuse 15a Shift lock ecu (under center console, near selector lever) Unlock warning switch & key interlock solenoid (behind left side of dash)
STARTING/CHARGING Charging Wiring Diagram for Lexus GS 300 2004 List of elements for Charging Wiring Diagram for Lexus GS 300 2004: 39 (behind center of dash, forward of center console) center air bag sensor assembly A/c control assembly (behind center of dash) A13 Acc Alt fuse 120a Alt-s fuse 5a Am1 fuse 40a Battery Battery ground C12 C13 Charge warning light Combination meter Cpu Driver side j/b (behind left kick panel) Engine control module (at left side of engine compt, in ecu box) Engine room r/b 1 (on right side of engine compt, behind strut tower) F13 Gauge fuse 10a Generator Gs 300 Gs 430 If (at left kick panel) Ignition switch Ii (at right side of dash) Junction connector 1 (in ecu box) Junction connector 17 (behind upper right side of dash) Junction connector 6 (behind left kick panel) Lock Mpx+ Mpx- Mpx1 Mpx2 Nca Off Red Run Start Tilt & telescopic ecu (behind left side of dash) Starting Wiring Diagram for Lexus GS 300 2004 List of elements for Starting Wiring Diagram for Lexus GS 300 2004: 28 Acc Am2 Am2 fuse 15a Battery Battery ground Driver side j/b (behind left kick panel) Ee (under abs & trac & vsc actuator) Engine control module (at left side of engine compartment, in ecu box) Engine room r/b 1 (on right side of engine compartment, behind strut tower) F10 Gs 300 Gs 430 Ignition switch J4 a Junction connector 3 & 4 (in ecu box) Junction connector 5 (in engine room r/b 2) Lock Main fuse 40a Nca Off Park/neutral position switch (on transmission) Run St2 Sta Start Starter Starter fuse 5a Starter relay
SUPPLEMENTAL RESTRAINTS Supplemental Restraints Wiring Diagram for Lexus GS 300 2004 List of elements for Supplemental Restraints Wiring Diagram for Lexus GS 300 2004: 80 junction connector 17 (behind upper right side of dash) (at base of left "b" pillar) left pretensioner (at left front corner of engine compartment) left front air bag sensor (at left side of dash) (at right (at right front corner of engine compartment) right front air bag sensor (at right rear floor partition panel) (at right side of dash) ii (right side of dash) +sl +sr -sl -sr Air bag squib (front passenger air bag assembly) Air bag squib (steering wheel pad) (center of steering wheel) C12 C13 Center air bag sensor assembly (behind center of dash, forward of center console) Combination meter Data link connector 3 (partial) (behind left side of dash) Driver side j/b (behind left kick panel) Esl Esr F13 Fsl Fsl+ Fsl- Fsr Gauge fuse 10a Hot at all times Hot in on or start Icl+ Icl- Icr+ Icr- If (at left kick panel) Ig1 Ig2 Ign fuse 5a Junction connector (behind left kick panel) Junction connector (behind left side of dash) Junction connector 24 (under right front seat) Junction connector j17 (behind upper right side of dash) Left airbag curtain shield squib (at left Left side air bag sensor (near base of left ``b" pillar) Left side airbag squib (under left front seat) Mpx1 Mpx2 Pl+ Pl- Pnk Pr+ Pr- Rbe+ Right airbag curtain shield squib Right buckle switch Right buckle switch & seat belt warning occupant detection sensor Right pretensioner (at base of right "b" pillar) Right side air bag sensor (near base of right ``b" pillar) Right side airbag squib (under right front seat) Seat belt warning occupant detection sensor Sfl+ Sfl- Sfr+ Sfr- Sil Solid state Spiral cable Srs warning light Srs-b fuse 5a Ssl Ssl+ Ssl- Ssr Ssr+ Ssr- Tilt & telescopic ecu (behind left side of dash) Vupl Vupr ``a" pillar)
TRANSMISSION A/T Wiring Diagram for Lexus GS 300 2004 List of elements for A/T Wiring Diagram for Lexus GS 300 2004: 78 (engine harn, left rear top of engine) (in ecu box) j/c 1 (in ecu box) j/c 3, j/c 4 (on transmission) (park/neutral position switch a/t indicator switch (right side of dash) j/c 17 A/t shift main switch (part of combination switch) Accelerator position sensor (right rear side of engine) Batt Body ecu 1 (in passenger side j/b) Computer data lines system Data link connector 1 (left side of engine compt) Data link connector 3 (behind left side of dash) Driver side j/b (behind left kick panel) E01 E02 E03 E2 (engine harn, left rear top of engine) Eb (middle of left inner fender panel) Ec (front of intake manifold) Ee (under abs/ trac/vsc actuator) Efi fuse 25a Efi relay Electronic controlled transmission solenoid (in transmission) Electronically controlled transmission pattern select switch Engine control module (left side of engine compt, in ecu box) Engine coolant temperature sensor (top left front of engine) Engine room r/b 1 (right side of engine compt) Eom Gauge fuse 10a Hot at all times Hot in on or start Ign fuse 5a Igsw Ii (right side of dash) J/c 1 (in ecu box) J/c 11 (left side of dash) J/c 14 (left side of dash) J/c 17 (right side of dash) J/c 3, j/c 4 (in ecu box) j3 J/c 5 (in engine room r/b 2) J/c 7 (left kick panel) J/c 9 (left side of dash) Mpx- Mpx1 Mpx2 Mrel Nco+ Nco- O/d direct clutch speed sensor (on trans- mission) Oil Pnk Pwr R n Red Sftd Sftu Shift lock control ecu (under center console, near selector lever) Sln+ Sln- sln- Slt+ Slt- Slu+ Slu- Snow Sp2+ Sp2- Starting/ charging system Stop fuse 15a Stoplight switch (on brake pedal bracket) Stp Throttle position sensor (on throttle body) Thw Vehicle speed sensor (on trans- mission) Vpa Vpa2 Vta Vta2 Wfse
TRUNK, TAILGATE, FUEL DOOR Trunk, Tailgate, Fuel Door Wiring Diagram for Lexus GS 300 2004 List of elements for Trunk, Tailgate, Fuel Door Wiring Diagram for Lexus GS 300 2004: 34 Acc Becu Bj (at left rear floor partition panel) Bk (at left rear quarterpanel) Body ecu 1 (in passenger side j/b) Bsub Driver side j/b (behind left kick panel) Ecu-b2 fuse 10a Ecu-b3 fuse 20a Ecu-ig fuse 15a F11 F13 Fuel lid opener motor (at left side of luggage compt) Fuel lid opener switch Fuel opn fuse 10a Gnd H10 Hot at all times Hot in acc or run Hot in on or start If (at left kick panel) Ii (at right side of dash) J/c 10 (behind left side of dash) J/c 13 (behind left side of dash) J/c 15 (behind left side of dash) J/c 20 (above left rear wheelwell) J/c 6 (behind left kick panel) J/c 7 (behind left kick panel) Luggage compartment door opener motor (rear center of luggage compartment) Luggage compartment door opener switch Passenger side j/b (behind right kick panel) Radio 2 fuse 15a Tr+ Tsw
WARNING SYSTEMS Warning Systems Wiring Diagram for Lexus GS 300 2004 List of elements for Warning Systems Wiring Diagram for Lexus GS 300 2004: 71 (behind left side of dash) j/c 9 (behind upper center of dash) instrument panel j/b Acc Bdr Becu Bj (at left rear floor partition panel) Bl (at right rear floor partition panel) Body ecu 1 Body ecu 2 Bsub Buzzer C12 C13 Center air bag sensor assembly (behind center of dash, forward of center console) Combination meter Computer data lines system Cpu Cpub Cty Ctye D fr fuse 20a D22 D23 D24 Dbkl Door ind Driver door ecu (in driver's door) Driver side j/b (behind left kick panel) Ecu-b2 fuse 10a Ecu-b3 fuse 20a Ecu-ig fuse 15a Engine room r/b 1 (on right side of engine compt, behind strut tower) F11 F13 Fsc+ Fsc- Gauge fuse 10a Gnd H10 H11 Hot at all times Hot in acc or on Hot in on or start I6 (in dash harness, behind right side of glove box) If (at left kick panel) Ii (at right side of dash) J/c 10 (behind left side of dash) J/c 13 (behind left side of dash) J/c 15 (behind left side of dash) J/c 17 (behind upper right side of dash) J/c 23 (under left front seat) J/c 24 (under right front seat) J/c 6 J/c 7 (behind left kick panel) Ksw Left buckle switch (in left front seat belt buckle) Left front door courtesy switch Mpx1 Mpx2 Passenger side j/b (behind right kick panel) Passenger side seat belt warning light (in clock) Radio fuse 15a Rbe+ Right buckle switch Right buckle switch (in right front seat belt buckle) Seat belt ind Seat belt warning occupant detection sensor Seat belt warning occupant detection sensor (under front passenger's seat) Sig Srs-b fuse 5a Unlock warning switch
WIPER/WASHER Headlamp Washer Wiring Diagram for Lexus GS 300 2004 List of elements for Headlamp Washer Wiring Diagram for Lexus GS 300 2004: 30 Auto Body ecu 2 (in driver side j/b) C14 Combination switch Daytime running light relay (main) (behind right end of dash) Diode (drl) (behind right side of dash) Driver side j/b (behind left kick panel) Drl Eb (at middle of left inner fender panel) Engine room r/b 1 (on right side of engine compt, behind strut tower) H-lp cln fuse 30a Head Head lp relay Headlight cleaner control relay (at left front corner of engine compt, behind headlight) Headlight cleaner motor (at left front corner of engine compt, behind headlight) Headlight cleaner switch Headlights system Hot at all times Hot in on or start Hrly I6 (in dash harness, behind right side of glove box) If (at left kick panel) Junction connector (behind left side of dash) Junction connector 10 (behind left side of dash) Junction connector 6 (behind left kick panel) Light control switch Main fuse 40a Mtr Tail off Washer fuse 20a Wiper/Washer Wiring Diagram for Lexus GS 300 2004 List of elements for Wiper/Washer Wiring Diagram for Lexus GS 300 2004: 25 C12 C13 C17 Combination meter Combination switch Driver side j/b (behind left kick panel) Eb (at middle of left inner fender panel) Front wiper motor (on left side of firewall) Gauge fuse 10a Hot in run or start If (at left kick panel) Ig (at left side of dash) Int Junction connector 10 (behind left side of dash) Junction connector 12 (behind left side of dash) Junction connector 6 Off Solid state Washer fuse 20a Washer level warning light Washer level warning switch (at left front corner of engine compt) Washer motor (at left front corner of engine compt) Washer switch Wiper fuse 25a Wiper switch
