Diagram sections — 29 (73 total)
AIR CONDITIONING ANTI-LOCK BRAKES ANTI-THEFT BODY CONTROL MODULES COMPUTER DATA LINES COOLING FAN CRUISE CONTROL DEFOGGERS ENGINE PERFORMANCE EXTERIOR LIGHTS GROUND DISTRIBUTION HEADLIGHTS HORN INSTRUMENT CLUSTER INTERIOR LIGHTS MEMORY SYSTEMS POWER DISTRIBUTION POWER DOOR LOCKS POWER MIRRORS POWER SEATS POWER TOP/SUNROOF POWER WINDOWS RADIO SHIFT INTERLOCK STARTING/CHARGING SUPPLEMENTAL RESTRAINTS TRANSMISSION WARNING SYSTEMS WIPER/WASHER
AIR CONDITIONING Automatic A/C Wiring Diagram (1 of 3) for Isuzu Ascender 2003 List of elements for Automatic A/C Wiring Diagram (1 of 3) for Isuzu Ascender 2003: 68 (in dash center trim panel, beneath radio) hvac control module 5v ref A/c comp status A/c low press sw A10 A11 A12 Air temp door ctrl Air temp dr pos sig Air temperature actuator (left) (behind left center of dash) Air temperature actuator (right) (behind right center of dash) Ambient air temp sig Ambient air temperature sensor Ambient light Ambient light/ sunload sensor assembly (in center of upper dash trim panel) B10 B11 B12 Battery Blower fuse 35 40a Blower motor Blower motor control module (below right side of dash) Blwr mtr spd ctrl Class 2 Control Coolant bypass ctrl Coolant bypass valve Def door pos sig Defrost actuator (behind upper left center of dash) Defrost door ctrl G102 (at left side of engine compartment) G103 (at right rear of engine compt) G201 (near right front of lower console) G302 (on lower left ``b" pillar) Ground Hot at all times Hot in run Hvac 1 fuse 39 10a Hvac b fuse 36 10a Ign 3 Inside air temp ctrl Inside air temp sig Inside air temperature sensor (in left ``b" pillar) Left sensor Low ref Low reference Lower left air temperature sensor (in lower left air duct assembly) Lower right air temperature sensor (in lower right air duct assembly) Lwr lt air temp sig Lwr rt air temp sig Mode actuator (behind upper left center of dash) Mode door ctrl Mode door pos sig Nca Rear fuse block (below left rear seat) Recirc door cntrl Recirc dr pos sig Recirculation actuator (above blower motor, on right side of dash carrier) Red Right sensor Solid state Sp201 Tan Underhood fuse block (on left side of engine compt) Upper left air temperature sensor (in upper air duct) Upper right air temperature sensor (in upper air duct) Uppr lt air temp sig Uppr rt air temp sig Automatic A/C Wiring Diagram (2 of 3) for Isuzu Ascender 2003 List of elements for Automatic A/C Wiring Diagram (2 of 3) for Isuzu Ascender 2003: 57 (at right rear of engine compt) g103 +5v ref 4.2l 5.3l 5.3l 4.2l 5v ref A/c compressor clutch assembly A/c fuse 30 10a A/c low pressure switch (at right rear of underhood compt) A/c press sig A/c refrigerant pressure sensor (on bottom right side of engine) A/c relay 44 A12 Ambient light sens B11 B12 Body control module (bcm) (beneath left rear seat, on rear fuse block) Comp rly cntrl Cooling fan Cooling fan ctrl Data link connector (below dash, above accelerator pedal) E12 Ect sensor Engine coolant temperature (ect) sensor (on left front of engine, near generator) F12 Fan dn Fan fuse 20 10a Fan relay 45 Fan up Fan/temperature switch G103 (at right rear of engine compt) G107 (on lower left side of engine) G108 (on lower left side of engine) Hall sensor High spd maf Hot at all times Hot in run or start Ign e fuse 22 10a Inflatable restraint steering wheel module coil Low ref Low reference Lt sunload sens sig Nca Pnk Powertrain control module (4.2l: on left front of engine) (5.3l: on left front of engine compt) Radio ctrl sig Rt sunload sens sig Serial data Sound system Sounds system Sp205 Steering wheel control assembly (in steering wheel hub) Temp dn Temp up Underhood fuse block (on left side of engine compt) Volume/am/fm switch Wiper/ washer system Automatic A/C Wiring Diagram (3 of 3) for Isuzu Ascender 2003 List of elements for Automatic A/C Wiring Diagram (3 of 3) for Isuzu Ascender 2003: 49 (not used) (on lower right "d" pillar) g402 30a 5v reference A10 A11 A12 A13 A14 A15 A16 Auc hvac enable Aux act door ctlr Aux air temp dr ctlr Aux air temp dr pos Aux blwr mtr Aux mode door ctrl Aux mode dr pos sig Auxiliary air temperature actuator (on rear hvac module, behind right rear interior body panel) Auxiliary blower motor (behind interior right rear trim panel) Auxiliary blower motor control processor (in rear hvac module, behind right rear interior panel) Auxiliary blower motor fuse Auxiliary hvac control module (at rear of lower console) Auxiliary mode actuator (in lower console) B10 B11 B12 B13 B14 B15 B16 Battery Class 2 data Console mode actuator Console mode dr ctrl Ctrl mode dr pos sig Front auxiliary blower motor switch G201 (near right front of lower console) Ground Hot at all times Ill Interior lights system Low reference Off Rear Rear fuse block (below left rear seat) Red Rr hvac fuse 13 30a Sp201 Manual A/C Wiring Diagram (1 of 3) for Isuzu Ascender 2003 List of elements for Manual A/C Wiring Diagram (1 of 3) for Isuzu Ascender 2003: 56 (not used) (on bottom of blower assembly) blower motor resistor assembly 5v ref 87a A/c comp status A/c low press sw A10 A11 A12 Air temp door ctrl Air temp dr pos sig Air temperature actuator (left) (behind left center of dash) Air temperature actuator (right) (behind right center of dash) B10 B11 B12 Battery Blower fuse 35 40a Blower motor (below right side of dash) Blower motor relay Class 2 Coolant bypass ctrl Coolant bypass valve Def door pos sig Defrost actuator (behind upper left center of dash) Defrost door ctrl G102 (at left side of engine compartment) G103 (at right rear of engine compt) G201 (near right front of lower console) Ground High Hot at all times Hot in run Hvac control module (in dash center trim panel, beneath radio) Hvac fuse 44 30a Hvac i fuse 39 10a Hvac-b 10a Ign 3 Low Low ref Med1 Med2 Med3 Mode actuator (behind upper left center of dash) Mode door ctrl Mode door pos sig Off Off blwr mtr cntrl Rear fuse block (below left rear seat) Recirc door ctrl Recirculation actuator (above blower motor, on right side of dash carrier) Red Solid state Sp201 Tan Underhood fuse block (on left side of engine compt) Manual A/C Wiring Diagram (2 of 3) for Isuzu Ascender 2003 List of elements for Manual A/C Wiring Diagram (2 of 3) for Isuzu Ascender 2003: 35 (at right rear of engine compt) g103 +5v ref 4.2l 5.3l 5.3l 4.2l A/c compressor clutch assembly A/c compressor clutch relay A/c fuse 30 10a A/c low pressure switch (at right rear of underhood compt) A/c press sig A/c refrigerant pressure sensor (on bottom right side of engine) Comp rly cntrl Cooling fan Cooling fan ctrl Data link connector (below dash, above accelerator pedal) E12 Ect sensor Engine coolant temperature (ect) sensor (on left front of engine, near generator) F12 Fan fuse 20 10a Fan relay 45 G103 (at right rear of engine compt) G107 (on lower left side of engine) G108 (on lower left side of engine) Hall sensor High spd maf Hot at all times Hot in run or start Ign e fuse 22 10a Low ref Low reference Powertrain control module (4.2l: on left front of engine) (5.3l: on left front of engine compt) Serial data Sp205 Underhood fuse block (on left side of engine compt) Manual A/C Wiring Diagram (3 of 3) for Isuzu Ascender 2003 List of elements for Manual A/C Wiring Diagram (3 of 3) for Isuzu Ascender 2003: 49 (not used) (on lower right ``d" pillar) g402 30a 5v reference A10 A11 A12 A13 A14 A15 A16 Auc hvac enable Aux act door ctlr Aux air temp dr ctlr Aux air temp dr pos Aux blwr mtr Aux mode door ctrl Aux mode dr pos sig Auxiliary air temperature actuator (on rear hvac module, behind right rear interior body panel) Auxiliary blower motor (behind interior right rear trim panel) Auxiliary blower motor control processor (in rear hvac module, behind right rear interior panel) Auxiliary blower motor fuse Auxiliary hvac control module (at rear of lower console) Auxiliary mode actuator (in lower console) B10 B11 B12 B13 B14 B15 B16 Battery Class 2 data Console mode actuator Console mode dr ctrl Ctrl mode dr pos sig Front auxiliary blower motor switch G201 (near right front of lower console) Ground Hot at all times Ill Interior lights system Low reference Off Rear Rear fuse block (below left rear seat) Red Rr hvac fuse 13 30a Sp201
ANTI-LOCK BRAKES Anti-lock Brakes Wiring Diagram for Isuzu Ascender 2003 List of elements for Anti-lock Brakes Wiring Diagram for Isuzu Ascender 2003: 63 (below dash, above accelerator pedal) data link connector 4.2l 5.3l Abs fuse 33 60a Abs pump Anti-lock indicator Automatic a/c B10 Body control module (bcm) (beneath left rear seat, on rear fuse block) Brake fluid level switch (in brake master cylinder fluid reservoir) Brake fluid lvl sig Brake fuse 51 10a Brake indicator C11 Cruise control system Delivered torque sig Delivered torque signal Electronic brake control module (on inner left frame rail, adjacent to transmission) Front axle actuator (lower right front of engine, on oil pan) G107 (on lower left side of engine) G201 (near right front of lower console) G304 (outside of left frame rail, near electronic brake control module) Hot at all times Hot in run Hot in run or start Hvac 1 fuse 39 10a Ign e fuse 22 10a Ignition 3 Illum Instrument panel cluster Interior lights system Ipc/dic fuse 24 10a Left front wheel speed sensor (on left front wheelhousing) Lf whl spd sens ref Lf whl spd sens sig Manual a/c Nca Pnk Powertrain control module (pcm) (4.2l: on left front of engine) (5.3l: on left front of engine compt) Rear fuse block (below left rear seat) Red Requested torque sig Requested torque signal Rf whl spd sens ref Rf whl spd sens sig Right front wheel speed sensor (on right front wheelhousing) Serial data Sp201 Splice pack sp205 Stoplamp switch (on brake pedal support) Tan Tcc brake switch sig Trac active telltale Trac disable telltale Traction active indicator Traction control switch Traction disable sw Traction disable switch Traction off indicator Twisted wires Underhood fuse block (on left side of engine compt) Vehicle speed signal Vss
ANTI-THEFT Immobilizer Wiring Diagram for Isuzu Ascender 2003 List of elements for Immobilizer Wiring Diagram for Isuzu Ascender 2003: 30 (+) (-) (2wd: on right side of transmission) (4wd: on rear of transfer case) (on lower left side of dash, near engine hood release lever) Battery input Dash fuse box (on left of dash behind trim panel) Data link connector E-35 E23 (at right side of engine) Engine fuse 12 15a Ground Hot at all times Hot in on or start I-22 I-43 I-99 Ignition input Immobi- lizer ind lamp Immobilizer antenna coil Immobilizer control unit (in right side of steering column) Immobilizer fuse 23 10a Ind control Meter assembly Meter fuse 11 15a Nca Pcm output Powetrain control module (left side of engine compt) Starter relay (in fuse/ relay box) Vehicle speed sensor (vss) Vss input
BODY CONTROL MODULES
COMPUTER DATA LINES Computer Data Lines Wiring Diagram for Isuzu Ascender 2003 List of elements for Computer Data Lines Wiring Diagram for Isuzu Ascender 2003: 37 class 2 serial data (not used) 4.2l 5.3l A11 Audio amplifier (in rear compt, behind left side panel) Auto a/c manual a/c Auxiliary hvac control module (at rear of lower console) B11 Body control module (bcm) (beneath left rear seat, on rear fuse block) Cigar fuse 13 20a Class 2 serial data Data link connector (below dash, above accelerator pedal) Driver's door module (on lower part of driver's door switch panel) Driver's memory seat module (mounted on underside of driver's seat) Electronic brake control module (on inner left frame rail, adjacent to transmission) F14 Front passenger's door module (on lower part of passenger's door switch panel) G102 (at left side of engine compartment) G201 (near right front of lower console) Hot at all times Hvac control module (in dash center trim panel, beneath radio) Inflatable restraint sensing & diagnostic module (beneath lower console) Instrument panel cluster Liftgate module (inside liftgate) Passenger's memory seat module (mounted on underside of passenger's seat) Power distribution system Powertrain control module (pcm) (4.2l: on left front of engine) (5.3l: on left front of engine compt) Radio Splice pack sp201 Splice pack sp205 Splice pack sp306 Tan Transfer case shift control module (4wd) (behind left lower dash) Underhood fuse block (on left side of engine compt) Vehicle communication interface module (under right rear seat) W/ bose sound system
COOLING FAN Cooling Fan Wiring Diagram for Isuzu Ascender 2003 List of elements for Cooling Fan Wiring Diagram for Isuzu Ascender 2003: 18 4.2l 5.3l Clutch cntrl Cooling fan Ect sensor Engine coolant temperature sensor (on left front of engine, near generator) Fan fuse 20 10a Fan relay Fan speed sig G103 (at right rear of engine compt) G108 (on lower left side of engine) Ground Hall sensor Hot in run or start Low ref Low reference Powertrain control module (4.2l: on left front of engine) (5.3l: on left front of engine compt) Underhood fuse block (on left side of engine compt)
CRUISE CONTROL
4.2L 4.2L, Cruise Control Wiring Diagram for Isuzu Ascender 2003 List of elements for 4.2L, Cruise Control Wiring Diagram for Isuzu Ascender 2003: 46 5 volt ref Accelerator pedal position sensor (on accelerator bracket) App sensor 1 App sensor 2 B10 B4 c1 C9 c2 Close Cruise release E3 c3 Electronic brake control module (on inner left frame rail, adjacent to transmission) Exterior lights system Hot at all times Hot in run Hot in run & start Hvac 1 fuse 39 10a Ign e fuse 22 10a Low ref On sw On/off sensor On/off switch Open Pnk Powertrain control module (pcm) (on left front of engine) Rear fuse block (below left rear seat) Res/accel sw Res/accel switch Set/coast sw Set/coast switch St/lp fuse 12 25a Stop lamp input Stoplamp switch (on brake pedal support) Tac motor ctrl 1 Tac motor ctrl 2 Tan Throttle body (throttle actuator control motor) Tp sensor 1 Tp sensor 2 Turn signal/ multifunction switch Twisted wires Underhood fuse block (on left side of engine compartment) Veh stop fuse 34 15a Vehicle speed sensor (vss) (2wd: on right rear of transmission) (4wd: on left rear of transfer case) Vehicle speed sig Vss hi Vss lo
5.3L 5.3L, Cruise Control Wiring Diagram for Isuzu Ascender 2003 List of elements for 5.3L, Cruise Control Wiring Diagram for Isuzu Ascender 2003: 51 5 volt ref Accelerator pedal position sensor (on accelerator bracket) App sensor 1 App sensor 2 B10 B4 c1 C9 c2 Close Cruise release E12 c1 E3 c3 Electronic brake control module (on inner left frame rail, adjacent to transmission) Etc fuse 23 15a Exterior lights system G108 (on lower left side of engine) Ground Hot at all times Hot in run and start Hot in run rear fuse block (below left rear seat) Hvac 1 fuse 39 10a Ign e fuse 22 10a Ign voltage Low ref On sw On/off sensor On/off switch Open Pnk Powertrain control module (pcm) (on left front of engine compartment) Res/accel sw Res/accel switch Set/coast sw Set/coast switch St/lp fuse 12 25a Stop lamp input Stoplamp switch (on brake pedal support) Tac motor ctrl Tan Throttle actuator control module (on left rear of engine compartment) Throttle body (throttle actuator control motor) Tp sensor 1 Tp sensor 2 Turn signal/ multifunction switch Twisted wires Uart serial data Underhood fuse block (on left side of engine compartment) Veh stop fuse 34 15a Vehicle speed sensor (vss) (2wd: on right rear of transmission) (4wd: on left rear of transfer case) Vehicle speed sig Vss hi Vss lo
DEFOGGERS Defoggers Wiring Diagram for Isuzu Ascender 2003 List of elements for Defoggers Wiring Diagram for Isuzu Ascender 2003: 22 A1 c2 B11 Bat Computer data lines system Driver outside rearview mirror Driver's door module (on lower part of driver's door switch panel) Front passenger's door module (on lower part of passenger's door switch panel) G401 (on lower left "d" pillar) Gnd Hot at all times Htr Hvac control module (in dash center trim panel, beneath radio) Lgm 2 fuse 3 30a Liftgate module (inside liftgate) Mirror heater Passenger outside rearview mirror R def Rear fuse block (below left rear seat) Rear window defogger grid Serial data Sply volt Tan
ENGINE PERFORMANCE
4.2L 4.2L, Engine Performance Wiring Diagram (1 of 5) for Isuzu Ascender 2003 List of elements for 4.2L, Engine Performance Wiring Diagram (1 of 5) for Isuzu Ascender 2003: 58 4wd low sig 5 volt ref A/c compr rel A/c press sens Accelerator pedal position sensor (above accelerator pedal) Air conditioning system Anti lock brakes system App sens 1 sig App sens 2 sig B10 Battery Body control module (bcm) (beneath left rear seat) Cc on sw input Cls 2 data Cool fan clutch Cooling fan sp Cooling fans system Crank voltage Cruise control system Data link connector (on bottom left side of dash) Eng spd sig out F14 Fuel tank press Fuel tank pressure sensor (top left rear of fuel tank) Hot at all times Hot in acacia, run or start Hot in run & start Iat sens sig Ign 0 fuse 47 10a Ign 0 input Ign 1 volt Ign e fuse 22 10a Instrument cluster system Instrument panel cluster Intake air temperature sensor (in air intake duct, top right of engine) Lo ref Low ref Malfunction indicator lamp Mil ctrl Pcb b fuse 10 20a Pnk Pnp sw input Powertrain control module (upper left side of engine) Prim fuel lvl Rear fuse block Res/acc sw Set/cruise sw Sp205 Starting/ charging system Stop lamp volt Strt enable rel Tan Tcc rel sw sig Tcc/brake switch (above brake pedal, on bracket) Transmission controls (transfer case circuit) Underhood fuse block Vss Vss signal out 4.2L, Engine Performance Wiring Diagram (2 of 5) for Isuzu Ascender 2003 List of elements for 4.2L, Engine Performance Wiring Diagram (2 of 5) for Isuzu Ascender 2003: 19 A11 Ecm b fuse 10 20a Eng 1 fuse 26 10a Engine oil pressure switch (right side of eng block) Evaporative emission canister purge solenoid (left side of engine block) Evaporative emission canister vent solenoid (at rear of fuel tank) F/pmp relay Fuel pump/ & sender assembly (in fuel tank) G107 (lower left side of engine) G108 (lower left side of engine) G305 (on outside of left frame rail, near fuel tank) Hot at all times Hot in run & start Park/neutral position switch (lower left side of transmission) Pnk Pnk a Under- hood fuse block Under- hood junction block Vehicle speed sensor (left rear of transfer case) 4.2L, Engine Performance Wiring Diagram (3 of 5) for Isuzu Ascender 2003 List of elements for 4.2L, Engine Performance Wiring Diagram (3 of 5) for Isuzu Ascender 2003: 61 (left rear of engine block) crankshaft position sensor 1-2 shift sol ctrl 2-3 shift sol ctrl 3-2 shift sol 5v ref Anti lock brakes system Cam pos sol hi Camshaft actuator solenoid assembly (right front of cylinder head) Ckp sens sig Deliv torque sig Ect sens sig Engine coolant temperature sensor (left front of engine block) Evap can prg ctl Evap can vent Fuel inj 1 Fuel inj 2 Fuel inj 3 Fuel inj 4 Fuel inj 5 Fuel inj 6 G108 (lower left side of engine) Gfd cyc sig Ground powertrain control module (upper left side of engine) H02 hi sig b1 s2 H02s hi sig b1 s1 H02s lo sig b1 s2 Heated oxygen sensor 1 (on exhaust manifold, right side of engine) Heated oxygen sensor 2 (downstream of catalytic converter) Ho2s htr lo b1 s1 Ho2s htr lo b1 s2 Ho2s lo sig b1 s1 Hot at all times Hot in run & start Ic 1 ctrl Ic 2 ctrl Ic 3 ctrl Ic 4 ctrl Ic 5 ctrl Ic 6 ctrl Injectors Low ref Manifold absolute pressure sensor (upper left side of engine) Map sens sig Nca O2 fuse 29 Oil pres sw sig Pc sol high ctrl Pc sol low ctrl Pcm 1 fuse 28 15a Pnk Powertrain control module (upper left side of engine) Prim fuel pmp rel Req torque sig Starting/ charging system Tan Tcc pwm sol Tcc sol vlv ctrl Trns rg sw sig a Under- hood fuse block Vss high sig Vss low signal 4.2L, Engine Performance Wiring Diagram (4 of 5) for Isuzu Ascender 2003 List of elements for 4.2L, Engine Performance Wiring Diagram (4 of 5) for Isuzu Ascender 2003: 32 Automatic Automatic transmission C10 Ctrl D10 D2 sw D3 sw D4 sw E10 F10 G109 (on lower side of engine) Gnd Ign Ignition coils Lo sw Nca Pnk Pnk a Pressure control Red Rev sw Solenoid 1-2 shift red Solenoid 2-3 shift red Solenoid 3-2 shift red Solenoid tcc pmw red Solenoid tcc red Solenoid valve Spark plug Tan Temperature sensor Transmission fluid Under- hood fuse block 4.2L, Engine Performance Wiring Diagram (5 of 5) for Isuzu Ascender 2003 List of elements for 4.2L, Engine Performance Wiring Diagram (5 of 5) for Isuzu Ascender 2003: 35 (not used) 12v ref 5v ref Camshaft position sensor (right front of cylinder head) Cooling fans system Cpm sens sig Damping l/d sig Etc fuse 23 10a Gen turn on sig Hot in run & start Ign 1 voltage Knock sensor 1 (front) (lower left front of engine block) Knock sensor 2 (rear) (lower left rear of engine block) Ks 1 sig Ks 2 sig Low oil press sw Low ref Pnk Powertrain control module (upper left side of engine) Red Starting/ charging system Tac motor Tac mtr ctrl 1 Tac mtr ctrl 2 Tfp sw sig a Tfp sw sig b Tfp sw sig c Tft sens sig Throttle body (throttle position sensor) (on throttle body) Tp sens 1 sig Tp sens 2 sig Trs sig b Trs sig c Trs sig p Under- hood fuse block
5.3L 5.3L, Engine Performance Wiring Diagram (1 of 5) for Isuzu Ascender 2003 List of elements for 5.3L, Engine Performance Wiring Diagram (1 of 5) for Isuzu Ascender 2003: 62 (at right rear of engine) crankshaft position (ckp) sensor +5v 12 volt ref 3-2 ss ctrl A/c system Anti-lock brakes system Batt volt C12 Ckp sig Cls 2 data Cmp sig Computer data lines system Cool fan ctch Cooling fans Cooling fans system D12 Ect sig G108 (lower left side of engine) Gnd Ho2s hi sig Ho2s lo Hot at all times Hot in accy, run & start Hot in run & start Ign 0 fuse 47 10a Ign 0 volt Ign 1 volt Inj 1 ctrl Inj 2 ctrl Inj 3 ctrl Inj 4 ctrl Inj 5 ctrl Inj 6 ctrl Inj 7 ctrl Inj 8 ctrl Inj a fuse 55 15a Inj b fuse 56 15a Injectors Ks 1 signal Ks 2 signal Low ref Low ref (a/t) O2a fuse 53 15a O2b fuse 54 15a Pcm b fuse 20a Pnk Pnk a Powertrain control module (near lower left front of engine) Prnd a sig Prnd b sig Prnd p sig Range b Range c Rear fuse block Red Req torq sig Rly ctrl Serial data Starting/ charging system Tan Tcc/brk sig Under- hood fuse block 5.3L, Engine Performance Wiring Diagram (2 of 5) for Isuzu Ascender 2003 List of elements for 5.3L, Engine Performance Wiring Diagram (2 of 5) for Isuzu Ascender 2003: 23 A11 Engine coolant temperature sensor (left front of engine block, near generator) F/pmp relay Fuel pump & sender assembly (inside fuel tank) G107 (on lower left side of engine) G108 (on lower left side of engine) G305 (on outside of left frame rail, near fuel tank) Heated oxygen sensor (bank 1 sensor 1) (left exh pipe, ahead of converter) Heated oxygen sensor (bank 1 sensor 2) (left exh pipe, behind converter) Heated oxygen sensor (bank 2 sensor 1) (right exh pipe, ahead of converter) Heated oxygen sensor (bank 2 sensor 2) (right exh pipe, behind converter) Hot at all times Knock sensor 1 (left) (below intake manifold on top of engine) Knock sensor 2 (right) (below intake manifold on top of engine) Nca Park/neutral position switch (on lower left side of transmission) Pcm b fuse 10 20a Pnk Pnk d Red Tan Tan a Under- hood fuse block 5.3L, Engine Performance Wiring Diagram (3 of 5) for Isuzu Ascender 2003 List of elements for 5.3L, Engine Performance Wiring Diagram (3 of 5) for Isuzu Ascender 2003: 25 1-2 sol 2-3 sol 3-2 sol A red A/t fluid pressure manual valve position switch Automatic transaxle Camshaft position sensor (top rear of engine block, near transmission) Engine oil pressure (eop) sensor Evaporative emission (evap) canister purge solenoid (left side of engine block) Evaporative emission canister vent solenoid (at rear or fuel tank) Fuel tank pressure sensor (top left rear of fuel tank) Manifold absolute pressure sensor (top of engine) N pnk P red Pc sol valve Pnk Pnk a Red Red/ Rev Tan Tcc pwm sol Tcc sol Tft sensor Vehicle speed sensor (left rear of transfer case) 5.3L, Engine Performance Wiring Diagram (4 of 5) for Isuzu Ascender 2003 List of elements for 5.3L, Engine Performance Wiring Diagram (4 of 5) for Isuzu Ascender 2003: 42 (above accelerator pedal) accelerator pedal position sensor App sens 1 App sens 2 B10 B4 c1 Canister fuse 10a Cruise control Cruise control system Cruise on Data E12 Etc fuse 23 15a Exterior lights system G108 (on lower left side of engine) Ground Hot at all times Hot in run or start Iat Ign 1 volt Intake air temperature (iat) (in air intake duct) Low ref Maf Mass airflow (maf) sensor/ Pnk R/a input Rear fuse block Red Ref low S/c input St/lp fuse 12 15a Stop- lamp switch (top of brake pedal bracket) Stp lp in Tac cntrl Tac ctrl Tan Throttle actuator control module (attached to throttle body) Throttle body Tp sens 1 Tp sens 2 Under- hood fuse block Underhood fuse block Veh stop fuse 34 15a 5.3L, Engine Performance Wiring Diagram (5 of 5) for Isuzu Ascender 2003 List of elements for 5.3L, Engine Performance Wiring Diagram (5 of 5) for Isuzu Ascender 2003: 70 (lwr left side of eng) g109 (lwr left side of engine) g109 1-2 ss ctrl 2-3 ss ctrl 4wd low sig A/c system A12 Air conditioning system Anti-lock brakes system Clu rly ctrl Cool fan spd Cooling fans system Crank fuse 10a Crank volt Css sig Ctrl Cycle sig Delivered torq Eng 1 fuse 26 10a Engine speed Engine speed signal Evap canp ctrl Evap vent ctrl Fuel lev sig Fuel press sig G108 (lower left side of engine) Gen on sig Gnd Ho2s htr low Ho2s low ctrl Hot in run & start Hot in start Iat sig Ign Ign ctrl Ign e fuse 22 10a Ign feed Ignition coils Instrument cluster system Instrument panel cluster Low ref Maf sig Malfunction indicator lamp Map sig Mil ctrl Nca Nca nca Pc sol hi ctrl Pc sol lo ctrl Pcm 1 fuse 28 10a Pmp rly ctrl Pnk Pnk d Powertrain control module (near lower left front of engine) Press sens sig Prnd c sig Red Red c Ref lo Spark plug Starting/charging system Tan Tcc pwm ctrl Tcc sol ctrl Tft sens sig Transmissions system Underhood fuse block Vss high sig Vss low sig Vss out
EXTERIOR LIGHTS Back-up Lamps Wiring Diagram for Isuzu Ascender 2003 List of elements for Back-up Lamps Wiring Diagram for Isuzu Ascender 2003: 34 4.2l 5.3l A9 c1 B12 B13 B13 c4 Back up fuse 27 15a Back up lamp voltage c3 Battery Body control module (bcm) (beneath left rear seat, on rear fuse block) C3 b4 Computer data lines system G108 (on lower left side of engine) G305 (on outside of left frame rail, near fuel tank) Hot at all times Hot in run or start Left back-up lamp Nca Park/neutral position switch (on left side of transmission) Pnk Pnk c Powertrain control module (pcm) (4.2l: on left front of engine) (5.3l: on left front of engine compartment) Rear fuse block (below left rear seat) Right back-up lamp Ser data Serial data Tbc 5 fuse 32 10a Tr sw a Tr sw b Tr sw c Tr sw p Trailer connector Trlr b/u fuse 4 10a Underhood fuse block (on left side of engine compt) Exterior Lamps Wiring Diagram (1 of 2) for Isuzu Ascender 2003 List of elements for Exterior Lamps Wiring Diagram (1 of 2) for Isuzu Ascender 2003: 54 (ipc) (on left front of engine) powertrain control module (pcm) 4.2l 5.3l A10 A14 Auto Back-up lamps circuit Body control module (bcm) (beneath left rear seat on rear fuse block) D10 Drl defeat Elek brk fuse 19 30a F park fuse 37 10a G102 (at left side of engine compartment) G103 (at right rear of engine compartment) G107 (on lower left side of engine) G201 (near right front of G201 (near right front of lower console) G403 (on left side of rear frame crossmember) Hazard switch Head Headlamp switch Hot at all times Ign e fuse 22 10a Instrument panel cluster Left Left front marker lamp Left front park/ turn signal lamp Left turn Lower console) Nca Park Park lamp relay 30 Pnk Prk lmp on Prk lmp rly Rear fuse block (below left rear seat) Red Right Right front marker lamp Right front park/ turn signal lamp Right turn Sp201 Tan Throttle actuator control module (on left rear of engine compt) To tr park fuse 42 (diagram 2 0f 2) Trailer connector Trailer fuse 32 30a Trl l trn fuse 51 10a Trl r trn fuse 50 10a Turn signal/ multi- function switch Turn switch Underhood fuse block (on left side of engine compartment) Underhood fuse block (on left side of engine compt) Exterior Lamps Wiring Diagram (2 of 2) for Isuzu Ascender 2003 List of elements for Exterior Lamps Wiring Diagram (2 of 2) for Isuzu Ascender 2003: 45 Battery C2 f2 Center high mount stop lamp (chmsl) Driver outside rearview mirror Driver's door module (on lower part of driver's door switch panel) Flash fuse 52 25a From a f park fuse 37 (diagram 1 0f 2) Front passenger's door module (on lower part of passenger's door switch panel) G201 (near right front of lower console) G401 (on lower left "d" pillar) G402 (on lower right "d" pillar) Ground Hazard sw Hot at all times Left license lamp Left tail lamp assembly Left turn fuse 38 10a Lr lamp volt Lr park fuse 14 10a Lt trn sig voltage Lt turn sig Mirror lt turn sig Mirror rt turn sig Park Passenger outside rearview mirror Rear fuse block (below left rear seat) Right license lamp Right tail lamp assembly Rr lamp volt Rr park fuse 17 10a Rt trn sig voltage Rt turn fuse 43 10a Rt turn sig Sp201 St/lp fuse 12 25a Stop Stoplamp sw Stoplamp switch (on brake pedal support) Tan Tr park fuse 42 10a Turn Turn signal/hazard flasher module (behind left side of dash) Underhood fuse block (on left side of engine compartment) Veh chmsl fuse 16 10a Veh stop fuse 34 15a
GROUND DISTRIBUTION Ground Distribution Wiring Diagram (1 of 4) for Isuzu Ascender 2003 List of elements for Ground Distribution Wiring Diagram (1 of 4) for Isuzu Ascender 2003: 65 (5.3l) (not used) (on lower left side of engine) 4.2l A/c low pressure switch A12 A18 Battery Braided wire C10 Coolant bypass valve Cooling fan D10 Data link connector (dlc) E10 F10 Front passenger door module (fpdm) Front wiper motor G101 (at left side of engine compartment) G102 (at left side of engine compartment) G103 (at right rear of engine compartment) G104 (at left rear of hood) G105 (at left side of engine compartment) G106 (on left front wheelwell) G109 G109 (4.2l) (on lower left side of engine) G110 (on lower left side of engine) G303 (on lower right "b" pillar) Hazard lamp switch Headlamp dimmer switch Horn assembly Hvac control module Ignition coil 1 Ignition coil 2 Ignition coil 3 Ignition coil 4 Ignition coil 5 Ignition coil 6 Ignition coil 7 Ignition coil 8 Ignition key alarm switch Inflatable restraint sensing and diagnostic module (sdm) Instrument panel cluster (ipc) Nca Onstar microphone ground shield 2 Passenger seat adjuster switch Radio Radio ground shield Rear window washer fluid pump Right front foglamp Right front park/turn signal lamp Right headlamp Right rear miniwedge (door jamb switch) Right rear window switch Tan Transfer case shift control module Turn signal multifunction switch Underhood fuse block (on left side of engine compartment) Underhood fuse block (on left side of engine compt) Vehicle communication interface module (vcim) W/ 4wd W/ premium sound bose system Windshield washer fluid level switch Windshield washer fluid pump Windshield wiper/ washer switch Ground Distribution Wiring Diagram (2 of 4) for Isuzu Ascender 2003 List of elements for Ground Distribution Wiring Diagram (2 of 4) for Isuzu Ascender 2003: 41 A11 Automatic a/c B11 Body control module (bcm) Cargo lamp Driver door module (ddm) Driver seat adjuster switch Electronic brake control module (ebcm) Fuel pump & sender assembly G302 (on lower G304 (outside of left frame rail, near electronic brake control module) G305 (on outside of left frame rail, near fuel tank) G306 (on body panel, left of rear door) Garage door opener Inside air temperature sensor assembly Inside rearview mirror Left "b" pillar) Left back-up lamp Left center courtesy reading lamp Left front courtesy reading lamp Left front vanity mirror lamp Left quarter glass switch Left rear courtesy reading lamp Left rear miniwedge (door jamb switch) Left rear window switch Lock relay 18 Nca Onstar ground shield 1 Outside moisture sensor Rap relay 22 Rear fuse block (below left rear seat) Right back-up lamp Right center courtesy reading lamp Right front courtesy reading lamp Right front vanity mirror lamp Right quarter glass switch Right rear courtesy reading lamp Sun roof module Sun roof switch Unlock relay 24 Voice recorder Ground Distribution Wiring Diagram (3 of 4) for Isuzu Ascender 2003 List of elements for Ground Distribution Wiring Diagram (3 of 4) for Isuzu Ascender 2003: 34 (automatic a/c) (manual a/c) (not used) Automatic a/c Automatic transmission shift lock actuator Auxiliary hvac control module B16 Blower motor control module Blower motor resistor assembly Cigar lighter Console auxiliary power outlet Data link connector (dlc) Fan/ temp switch Front auxiliary power outlet Fuel/ trip switch G201 (near right front of lower console) Headlamp switch Hvac control module Ignition lock cylinder control actuator Inflatable restraint steering wheel module coil Instrument panel cluster (ipc) Manual a/c Nca Radio Rear window wiper/ washer switch Recirulation actuator Select/ personal- ization switch Splice pack sp201 Steering wheel control assembly Traction control switch (2wd) Transfer case shift control Transfer case shift control module Turn signal hazard flasher module Volume am/fm switch Ground Distribution Wiring Diagram (4 of 4) for Isuzu Ascender 2003 List of elements for Ground Distribution Wiring Diagram (4 of 4) for Isuzu Ascender 2003: 39 (5.3l) (5.3l) powertrain control module (pcm) 4.2l 5.3l A/c compressor clutch assembly Audio amplifier Auxiliary hvac control module Brake fluid level switch Center high mounted stoplamp (chmsl) E6 c1 F/pump relay 41 Fan relay 45 Front axle actuator G107 (on lower left side of engine) G108 (on lower left side of engine) G401 (on lower left "d" pillar) G402 (on lower right "d" pillar) G403 (on left side of rear frame crossmember) Hdm relay 46 Ignition 1 relay 58 Left front foglamp Left front park/turn signal lamp Left headlamp Left license lamp Left taillamp assembly Liftgate module (lgm) Mass airflow (maf) sensor/ intake air temperature (iat) sensor Nca Park/ neutral position (pnp) switch Powertrain control module (pcm) Rear auxiliary power outlet Rear window defogger grid Rear window wiper motor Right license lamp Right taillamp assembly Throttle actuator control (tac) module Trailer connector Underhood fuse block (on left side of engine compartment) W/ premium sound bose system
HEADLIGHTS Headlights Wiring Diagram for Isuzu Ascender 2003 List of elements for Headlights Wiring Diagram for Isuzu Ascender 2003: 72 5.3l A c2 A12 Ambient light sensor (in center of upper dash trim panel) Ambient light/ sunload sensor assembly (in center of upper dash trim panel) Auto Automatic a/c B10 B14 B14 c4 B3 c2 Body control module (bcm) (beneath left rear seat, on rear fuse block) C12 c2 C2 c2 C4 f2 Coils fuse 14 10a Drl defeat Drl defeat ctrl Drl defeat ind E11 E14 E6 c1 F10 Flash to pass Fog lamp ind Fog lamp sw Fog lamp switch Fog lp fuse 11 10a Foglamp relay 39 G102 (at left side of engine compt) G103 (at right rear of engine compt) G107 (on lower left side of engine) G108 (on lower left side of engine) G201 (near right front of lower console) Hdlmp on sig Head Head- lamp on ind Headlamp driver module relay 46 Headlamp hi-relay 43 Headlamp switch High beam Hot at all times Ind ctrl Interior lights system Led dim sig Left front foglamp Left headlamp Left high beam headlamp Left low beam headlamp Low beam Low ref Lt high hdlp fuse 5 10a Lt low hdlp fuse 6 10a Manual a/c Nca Park Pnk Rear fuse block (below left rear seat) Right front foglamp Right headlamp Right high beam headlamp Right low beam headlamp Rly ctrl Rt hi hdlp fuse 2 10a Rt low hdlp fuse 3 10a Sense sig Splice pack sp201 Sw on sig Tan Turn signal/ multifunction switch Underhood fuse block (on left side of engine compt) Wiper/ washer system
HORN Horn Wiring Diagram for Isuzu Ascender 2003 List of elements for Horn Wiring Diagram for Isuzu Ascender 2003: 14 A note horn Body control module (bcm) (beneath left rear seat, on rear fuse block) E12 F note horn F4 c4 G103 (at right rear of engine compt) Horn assembly Horn fuse 21 15a Horn relay Horn relay control Hot at all times Switch Turn signal/ multifunction switch horn Underhood fuse block (on left side of engine compt)
INSTRUMENT CLUSTER
INTERIOR LIGHTS Courtesy Lamps Wiring Diagram (1 of 2) for Isuzu Ascender 2003 List of elements for Courtesy Lamps Wiring Diagram (1 of 2) for Isuzu Ascender 2003: 56 (not used) A11 A12 B11 B17 B18 Batt + Body control module (bcm) (beneath left rear seat, on rear fuse block) C1 f12 C2 b10 C3 f6 C4 b3 Courtesy lamp switch Data Door ajar Door ajar input Driver miniwedge (door jamb switch) Driver's door module (on lower part of driver's door switch panel) F10 F11 F8 c2 Front passenger miniwedge (door jamb switch) Front passenger's door module (on lower part of passenger's door switch panel) G201 (near right front of lower console) G302 (on lower left "b" pillar) G303 (on lower right "b" pillar) Gnd Ground Headlamp switch Hot at all times Interior lamp defeat switch Lamp ctrl Lamp on Lamp supp Left rear miniwedge (door jamb switch) Lift gate ajar input Lift glass ajar input Liftgate miniwedge (door jamb switch) Liftgate module (inside liftgate) Liftglass ajar switch (inside top of liftgate) Lmp defeat Low ref Lr dr sig Memory systems Nca Rear fuse block (below left rear seat) Right rear miniwedge (door jamb switch) Rr dr sig Serial data class 2 Sp201 Sp205 Sp306 Tan Tbc 3 fuse 4 10a Tbc 4 fuse 40 10a W/ memory seats Courtesy Lamps Wiring Diagram (2 of 2) for Isuzu Ascender 2003 List of elements for Courtesy Lamps Wiring Diagram (2 of 2) for Isuzu Ascender 2003: 13 Cargo lamp Courtesy G302 (on lower left "b" pillar) Left center courtesy/ reading lamp Left front courtesy/ reading lamp Left front vanity mirror lamp Left rear courtesy/ reading lamp Nca Reading Right center courtesy/ reading lamp Right front courtesy/ reading lamp Right front vanity mirror lamp Right rear courtesy/ reading lamp Instrument Illumination Wiring Diagram (1 of 2) for Isuzu Ascender 2003 List of elements for Instrument Illumination Wiring Diagram (1 of 2) for Isuzu Ascender 2003: 43 (automatic a/c) (automatic a/c) (manual a/c) (manual a/c) A15 Auxiliary hvac control module (at rear of lower console) B c1 B1 a1 B1 b16 B9 c1 C1 c C2 e3 C4 b13 Fan/ temp switch Front auxiliary blower motor switch Fuel/ trip switch G201 (near right front of lower console) G302 (on lower left "b" pillar) G303 (on lower right "b" pillar) Garage door opener Headlamp switch Hot at all times Hvac control module (in dash center trim panel, beneath radio) Inflatable restraint steering wheel module coil (in center hub of steering wheel) Instrument panel cluster (ipc) Left quarter glass switch Left rear window switch Nca Radio Rear fuse block (below left rear seat) Rear window wiper/ washer switch Right quarter glass switch Right rear window switch Select/ personal- ization switch Sp201 Steering wheel control assembly (in steering wheel hub) Steering wheel controls fuse Sunroof switch Tbc 2 fuse 7 10a Tbc 5 fuse 32 10a Traction control switch Transfer case shift control switch Voice recorder Volume am/fm switch Instrument Illumination Wiring Diagram (2 of 2) for Isuzu Ascender 2003 List of elements for Instrument Illumination Wiring Diagram (2 of 2) for Isuzu Ascender 2003: 50 2wd 4 hi 4 lo 5v ref A10 Afwd Auto B1 pulse width modulated B10 B13 B14 Batt + Body control module (bcm) (beneath left rear seat, on rear fuse block) C c2 D1 c2 Data Driver's door module (on lower part of driver's door switch panel) Drl defeat E11 Electronic brake control module (on inner left frame rail, adjacent to transmission) Fog rly ctrl Front fog lamp indicator G201 (near right front of lower console) Hdlp on Head Headlamp on indicator Headlamp switch Illum L c1 Lamp control Led dim Low ref Mem pwr Memory systems Memory/ heated seat switch Nca Park Park lamp on Pnk Rear fuse block (below left rear seat) Sp201 Sp205 Sp306 Traction active Traction control switch Traction disabled Transfer case shift control module (4wd) (behind left lower dash) Transfer case shift control switch Underhood fuse block (on left side of engine compt) W/ memory seats
MEMORY SYSTEMS Driver"s Memory Seat Wiring Diagram for Isuzu Ascender 2003 List of elements for Driver"s Memory Seat Wiring Diagram for Isuzu Ascender 2003: 82 5v ref A10 A11 A12 B10 B11 B12 Bat (+) Batt (+) C2 c1 Class 2 serial data Computer data lines system D tan Driver lumbar adjuster switch Driver seat adjuster switch Driver seat front position sensor Driver seat front vertical motor Driver seat horizontal motor Driver seat horizontal position sensor Driver seat lumbar horizontal motor Driver seat lumbar position sensor (forward/ rearward) Driver seat lumbar position sensor (up/ down) Driver seat lumbar vertical motor Driver seat rear position sensor Driver seat rear vertical motor Driver seat recline motor Driver seat recline position sensor Driver's memory seat module (mounted on underside of driver's seat) Frt dwn Frt up Frt vert dn sw sig Frt vert mtr dn ctrl Frt vert mtr pos sen Frt vert mtr up ctrl Frt vert up sw sig Fwd G302 (on lower left "b" pillar) G302 (on lower left ``b" pillar) Gnd Heated seat pwr Heated seat therm sig Horiz fwd sw sig Horiz mtr fwd ctrl Horiz mtr pos sen sig Horiz mtr rwd ctrl Horiz rwd sw sig Hot at all times Lgm/dsm fuse 6 10a Low ref Lum dn sw sig Lum fwd sw sig Lum horiz pos sen sig Lum motor dn crl Lum mtr fwd ctrl Lum mtr rwd ctrl Lum mtr up ctrl Lum rwd sw sig Lum sw pwr Lum up sw sig Out Passenger memory seat circuit Pnk Rear fuse block (below left rear seat) Rear vert dn sw sig Rear vert up sw sig Rec fwd Rec rwd Recline fwd sw sig Recline mtr fwd ctrl Recline mtr pos sen sig Recline mtr rwd ctrl Recline rwd sw sig Red Rr dwn Rr up Rr vert mtr dn ctrl Rr vert mtr up ctrl Rwd Seats circuit breaker 8 30a Seats system Tan Vert mtr pos sen sig Memory Mirrors Wiring Diagram for Isuzu Ascender 2003 List of elements for Memory Mirrors Wiring Diagram for Isuzu Ascender 2003: 53 (on lower right ``b" pillar) g303 5v ref Bat (+) Batt C10 Class 2 serial data Computer data lines system D10 Ddm fuse 10 10a Ddm fuse 12 10a Door switch panel) Down Down sig Driver Driver memory seat switch Driver outside rearview mirror Driver sig Driver's door module (on lower part of driver's Exit Front passenger's door module (on lower part of passenger's door switch panel) G302 (on lower left ``b" pillar) Gnd Horiz Horiz pos sig Horizontal Hot at all times Ign voltage Illum ctrl Left Left sig Low ref Lt doors circuit breaker 2 25a Mem Memory 1 sw Memory 2 sw Mir common Mir down ctrl Mir right ctrl Outside rearview mirror switch Pass Passenger outside rearview mirror Passenger sig Pnk Rear fuse block (below left rear seat) Red Right Right sig Rt doors circuit breaker 1 25a Tan Up sig Vert Vert pos sig Vertical Passenger"s Memory Seat Wiring Diagram for Isuzu Ascender 2003 List of elements for Passenger"s Memory Seat Wiring Diagram for Isuzu Ascender 2003: 73 5v ref A10 A11 A12 B10 B11 B12 Bat (+) Batt (+) C2 d1 Class 2 serial data Computer data lines system D tan Driver memory seat circuit Front passenger seat adjuster switch Frt dwn Frt up Frt vert dn sw sig Frt vert mtr dn ctrl Frt vert mtr up ctrl Frt vert up sw sig Fwd G303 (on lower right "b" pillar) Gnd Heated seat pwr Heated seat therm sig Horiz fwd sw sig Horiz mtr fwd ctrl Horiz mtr rwd ctrl Horiz rwd sw sig Hot at all times Lgm/dsm fuse 6 10a Low ref Lum dn sw sig Lum fwd sw sig Lum horiz pos sen sig Lum motor dn crl Lum mtr fwd ctrl Lum mtr rwd ctrl Lum mtr up ctrl Lum rwd sw sig Lum sw pwr Lum up sw sig Out Passenger lumbar adjuster switch Passenger seat front vertical motor Passenger seat horizontal motor Passenger seat lumbar horizontal motor Passenger seat lumbar position sensor (forward/ rearward) Passenger seat lumbar position sensor (up/ down) Passenger seat lumbar vertical motor Passenger seat rear vertical motor Passenger seat recline motor Passenger's memory seat module (mounted on underside of passenger's seat) Pnk Rear fuse block (below left rear seat) Rear vert dn sw sig Rear vert up sw sig Rec fwd Rec rwd Recline fwd sw sig Recline mtr fwd ctrl Recline mtr rwd ctrl Recline rwd sw sig Red Rr dwn Rr up Rr vert mtr dn ctrl Rr vert mtr up ctrl Rwd Seats circuit breaker 8 30a Seats system Tan
POWER DISTRIBUTION Power Distribution Wiring Diagram (1 of 6) for Isuzu Ascender 2003 List of elements for Power Distribution Wiring Diagram (1 of 6) for Isuzu Ascender 2003: 74 (4.2l) (5.3l) (not used) (on left side of engine compartment) underhood fuse block 1-2 shift solenoid (1-2 ss) valve 2-3 shift solenoid (2-3 ss) valve 3-2 shift solenoid (3-2 ss) valve 4wd fuse 48 15a A/c fuse 30 10a A/c relay 44 A11 A18 Abs fuse 33 60a Acc Atc fuse 8 25a Automatic transmission Automatic transmission shift lock actuator B11 Battery Body control module (bcm) C175 Crank fuse 17 10a D9 c1 Defrost actuator Electronic brake control module Elek brk fuse 19 30a F11 Fog lp fuse 11 10a Fog lp relay 39 Front axle actuator Fusible link (8 ga-red) Generator Horn fuse 21 15a Horn relay 40 Hvac 1 fuse 39 10a Hvac control module Hvac control module (manual a/c) Hvac fuse 44 30a I/p batt fuse 48 125 a Ign a fuse 34 40a Ign o fuse 47 10a Ignition switch Left air temperature actuator Lock Mode actuator Nca Pnk Powertrain control module (pcm) Rear fuse block (below left rear seat) Recirculation actuator Red Right air temperature actuator Run Start Starter Starter relay Starter solenoid Tbc ig fuse 50 3a To blower fuse 35 (diagram 2 of 6) To brake fuse 51 (diagram 2 of 6) To rear fuse block lgm/dsm fuse 6 (diagram 4 of 6) Torque converter clutch (tcc) solenoid valve Torque converter clutch pulse width modulation (tcc pwm) solenoid valve Traction control switch (2wd, automatic a/c) Trailer connector Trailer fuse 32 30a Transfer case encoder Transfer case shift control module Transfer case shift control switch Turn/signal multifunction switch Underhood fuse block (on left side of engine compt) Underhood fuse block (on left side of engine compt) c1 W/s wash fuse 9 15a W/s wash relay 42 Power Distribution Wiring Diagram (2 of 6) for Isuzu Ascender 2003 List of elements for Power Distribution Wiring Diagram (2 of 6) for Isuzu Ascender 2003: 63 (not used) (on left side of engine compartment) underhood fuse block 4.2l 5.3l A20 Acc Automatic a/c Aux pwr 1 fuse 46 20a Aux pwr 2 fuse 15 20a B15 Blower fuse 35 40a Blower motor control module Blower motor resistor assembly Body control module (bcm) Brake fuse 51 10a C11 Center high mounted stoplamp (chmsl) Cigar fuse 13 20a Cigar lighter Console auxiliary power outlet Data link connector (dlc) E10 Ecas fuse 1 30a Electronic brake control module (ebcm) Flash fuse 52 25a From b elek brk fuse 19 (diagram 1 of 6) From hvac i c fuse 39 (diagram 1 of 6) From rear l fuse block (diagram 4 of 6) Front auxiliary power outlet Front wiper motor Frt wpr fuse 33 25a G201 (near right front of lower console) G401 (on lower left "d" pillar) Ign b fuse 36 40a Ignition switch Instrument panel cluster (ipc) Ipc/dic fuse 24 10a Left tail/ stop lamp Lock Manual a/c Nca Outside moisture sensor Pnk Powertrain control module (pcm) Rain fuse 29 10a Rear auxiliary power outlet Rear fuse block (below left rear seat) Red Right tail/ stop lamp Run Splice pack sp201 St/lp fuse 12 25a Start Stoplamp switch Tbc acc fuse 31 3a Tbc run fuse 52 3a Throttle actuator control (tac) module To underhood fuse block (diagram 3 of 6) To wash fuse 7 (diagram 3 of 6) Turn/ signal hazard flasher module Underhood fuse block (on left side of engine compt) Veh chmsl fuse 16 10a Veh stop fuse 34 15a Power Distribution Wiring Diagram (3 of 6) for Isuzu Ascender 2003 List of elements for Power Distribution Wiring Diagram (3 of 6) for Isuzu Ascender 2003: 68 (4.2l) (4.2l) (5.3l) (5.3l) 4.2l 5.3l A/t shift lever B2 c1 Back-up fuse 27 15a Body control module (bcm) Btsi fuse 25 10a C12 Canister ride fuse 15 10a Coils fuse 14 10a E10 E12 E6 c2 Eng 1 fuse 26 10a Etc fuse 23 10a Evaporative emission (evap) canister purge solenoid Evaporative emission (evap) canister vent solenoid Evaporative emission (evap) canister vent solenoid (4.2l) F/pmp relay 41 Fan fuse 20 10a Fan relay 45 From d flash fuse 52 (diagram 2 of 6) From ignition switch (diagram 2 of 6) From pcm i fuse 28 f (diagram 3 of 6) Fuel injector 1 Fuel injector 2 Fuel injector 3 Fuel injector 4 Fuel injector 5 Fuel injector 6 Hdlp-hi relay 43 Hdm relay 46 Headlights system Heated oxygen sensor (ho2s) sensor 1 Heated oxygen sensor (ho2s) sensor 2 Ign e fuse 22 (diagram 4 of 6) Ignition coil 1 Ignition coil 2 Ignition coil 3 Ignition coil 4 Ignition coil 5 Ignition coil 6 Inflatable restraint sensing & diagnostic module (sdm) Lt hi hdlp fuse 5 10a Lt low hdlp fuse 6 10a Mass airflow (maf) sensor/ intake air temperature (iat) (5.3l) Nca O2 fuse 29 10a Park/neutral position (pnp) switch Pcm 1 fuse 28 15a 10a Pcm b fuse 10 20a Pnk Powertrain control module (pcm) Rear wash relay 38 Rt hi hdlp fuse 2 10a Rt low hdlp fuse 3 10a Sir fuse 18 10a Stoplamp switch Tbc 1 fuse 31 10a To ignition relay 58 (diagram 6 of 6) To o2 fuse 29 (diagram 3 of 6) Trailer connector Trlr b/u fuse 4 10a Underhood fuse block (on left side of engine compt) Wash fuse 7 20a Power Distribution Wiring Diagram (4 of 6) for Isuzu Ascender 2003 List of elements for Power Distribution Wiring Diagram (4 of 6) for Isuzu Ascender 2003: 56 (not used) A/c relay 44 A16 (automatic a/c) (manual a/c) A19 Amp fuse 11 20a Audio amplifier Auxiliary hvac control module B13 Body control module (bcm) C10 D10 D12 Ddm fuse 10 10a Driver door module (ddm) Driver memory seat module E12 E2 c3 From backup fuse 27 g (diagram 3 of 6) From hvac b fuse 36 h (diagram 4 of 6) From underhood fuse block, battery fuse 48 (diagram 1 of 6) Front passenger door module (fpdm) Garage door opener Hvac b fuse 36 10a Hvac control module Ign e fuse 22 10a Inside rearview mirror Instrument panel cluster (ipc) Left rear window switch Lgm/dsm fuse 6 10a Liftgate module (lgm) Lt doors circuit breaker 2 25a Nca Oh batt/onstar fuse 27 10a Park/ neutral position (pnp) switch Passenger memory seat module Pdm fuse 12 10a Pnk Radio Radio fuse 41 15a Rear fuse block (below left rear seat) Red Right rear window switch Rt doors circuit breaker 1 25a Stoplamp switch Tbc 5 fuse 32 10a Tbc ign 1 fuse 16 10a To aux pwr 1 fuse 46 (diagram 2 of 6) To ign 1 relay 58 (diagram 6 of 6) (5.3l) To o2 b fuse 54 (diagram 6 of 6) (5.3l) To rear foglamp relay 45 (diagram 5 of 6) To tbc 5 fuse 32 (diagram 4 of 6) Traction control switch (2wd, (manual a/c) Turn signal/ multi- function switch Underhood fuse block (on left side of engine compt) Vehicle communication interface module (vcim) Voice recorder Power Distribution Wiring Diagram (5 of 6) for Isuzu Ascender 2003 List of elements for Power Distribution Wiring Diagram (5 of 6) for Isuzu Ascender 2003: 46 (diagram 4 of 6) (not used) A12 Auxiliary blower motor Auxiliary blower motor control processor B17 Blower motor auxiliary fuse 30a Body control module (bcm) Driver lumbar adjuster switch Driver memory seat module Driver seat adjuster switch E10 From amp fuse 11 i From amp fuse 11 j (diagram 4 of 6) From tbc 4 k fuse 40 (diagram 5 of 6) G302 (on lower left "b" pillar) Left quarter glass switch Lgm 2 fuse 3 30a Liftgate module (lgm) Lock relay Locks fuse 10a Memory seats Nca Park lp relay 30 Passenger lumbar adjuster switch Passenger memory seat module Passenger seat adjuster switch Power seats Rap relay Rear fuse block (below left rear seat) Rear window wiper motor Right quarter glass switch Rr fog fuse 5 10a (not used) Rr fog lp relay 45 (not used) Rr hvac fuse 13 30a Rr wiper circuit breaker 9 15a Seats circuit breaker 30a Sun roof module Sunroof fuse 28 20a Tbc 2 fuse 7 10a Tbc 3 fuse 4 10a Tbc 4 fuse 40 10a To rr wiper circuit breaker 9 (diagram 5 of 6) To vent wdo fuse (diagram 5 of 6) Unlock relay Vent wdo fuse 20a Power Distribution Wiring Diagram (6 of 6) for Isuzu Ascender 2003 List of elements for Power Distribution Wiring Diagram (6 of 6) for Isuzu Ascender 2003: 39 (5.3l) (diagram 4 of 6) C12 D12 E12 Etc fuse 23 15a From ign e fuse 22 (diagram 4 of 6) From pcm b fuse 10 (diagram 3 of 6) From tbc ign 1 fuse 16 o Fuel injector 1 Fuel injector 2 Fuel injector 3 Fuel injector 4 Fuel injector 5 Fuel injector 6 Fuel injector 7 Fuel injector 8 G107 (on lower left side of engine) Heated oxygen sensor (h02s) bank 1 sensor 1 Heated oxygen sensor (h02s) bank 1 sensor 2 Heated oxygen sensor (h02s) bank 2 sensor 1 Heated oxygen sensor (h02s) bank 2 sensor 2 Ign 1 relay 58 (5.3l) Ignition coil 1 Ignition coil 2 Ignition coil 3 Ignition coil 4 Ignition coil 5 Ignition coil 6 Ignition coil 7 Ignition coil 8 Inj a fuse 55 15a Inj b fuse 56 15a Nca O2 a fuse 53 15a O2 b fuse 54 15a Pnk Throttle actuator control (tac) module Underhood fuse block (on left side of engine compt)
POWER DOOR LOCKS Power Door Locks Wiring Diagram for Isuzu Ascender 2003 List of elements for Power Door Locks Wiring Diagram for Isuzu Ascender 2003: 56 A12 A13 B10 Batt Battery Body control module (bcm) (beneath left rear seat, on rear fuse block) C10 C2 b6 C4 a13 C4 a5 D10 Ddm fuse 10a Door ajar Driver door lock actuator Driver door lock switch Driver door miniwedge switch (door jamb switch) Driver's door module (on lower part of driver's door switch panel) F10 Front passenger door lock actuator Front passenger door miniwedge switch Front passenger's door module (on lower part of passenger's door switch panel) G302 (on lower left "b" pillar) G303 (on lower right "b" pillar) Ground Hot at all times Left rear door lock actuator Left rear door miniwedge switch (door jamb switch) Lgm/dsm fuse 6 10a Liftgate door lock actuator Liftgate module (inside liftgate) Lock Lock ctrl Lock relay Lock relay 18 Locks fuse 21 10a Low ref Lr door ajar Lt doors circuit breaker 25a Memory systems Nca Passenger door lock switch Pdm fuse 10a Power Rear fuse block (below left rear seat) Right rear door lock actuator Riht rear door miniwedge switch (door jamb switch) Rr door ajar Rt doors circuit breaker 25a Serial data Sp205 Sp306 Tan Unlock Unlock ctrl Unlock relay Unlock relay 24
POWER MIRRORS Automatic Day/Night Mirror Wiring Diagram for Isuzu Ascender 2003 List of elements for Automatic Day/Night Mirror Wiring Diagram for Isuzu Ascender 2003: 25 (manual a/c) ambient air temperature sensor Air temp sensor B12 B6 c2 Back up lamp voltage output Back up voltage Body control module (bcm) (beneath left rear seat, on rear fuse block) Computer data lines system E10 E12 G302 (on lower left ``b" pillar) Ground Hot in on or start Ign 1 Ign e fuse 22 10a Inside rearview mirror Low ref Manual a/c Nca On/off Photo sensor Pnk Rear fuse block (below left rear seat) Serial data Underhood fuse block (on left side of engine compartment) Power Mirrors Wiring Diagram for Isuzu Ascender 2003 List of elements for Power Mirrors Wiring Diagram for Isuzu Ascender 2003: 44 5v ref Battery C10 Class 2 serial data Computer data lines system D10 Dcm fuse 10 10a Defogger Defogger system Down Down sig Driver Driver outside rearview mirror Driver sig Driver's door module (on lower part of driver's door switch panel) Front passenger door module (on lower part of passenger's door switch panel) G302 (on lower left "b" pillar) G303 (on lower right "b" pillar) Ground Horiz pos sig Horizontal Hot at all times Ign voltage Left Left sig Low ref Lt doors circuit breaker 2 25a Mir common Mir down ctrl Mir right ctrl Outside rearview mirror switch Pass Passenger sig Pdm fuse 12 10a Pnk Rear fuse block (below left rear seat) Red Right Right sig Rt doors circuit breaker 1 25a Tan Up sig Vert pos sig Vertical
POWER SEATS 8-Way Adjustable Power Seat Wiring Diagram for Isuzu Ascender 2003 List of elements for 8-Way Adjustable Power Seat Wiring Diagram for Isuzu Ascender 2003: 19 Driver seat adjuster switch Driver seat front vertical motor Driver seat horizontal motor Driver seat rear vertical motor Driver seat recline motor Front passenger seat adjuster switch Fwd G302 (on lower G303 (on lower right "b" pillar) Hot at all times Left "b" pillar) Passenger seat front vertical motor Passenger seat horizontal motor Passenger seat rear vertical motor Passenger seat recline motor Rear fuse block (below left rear seat) Rwd Seats circuit breaker 8 30a Tan Driver"s Heated Seat Wiring Diagram for Isuzu Ascender 2003 List of elements for Driver"s Heated Seat Wiring Diagram for Isuzu Ascender 2003: 41 (on lower left "b" pillar) g302 A12 B12 Back only ind Back only indicator Back only select Bat (+) Batt Batt (+) Batt + voltage C2 a6 C2 c1 C2 c10 Class 2 serial data Computer data lines system Ddm fuse 10a Driver back heated seat element Driver cushion heated seat element Driver heated seat switch Driver heated seat thermistor Driver's door module (on lower part of driver's door switch panel) Driver's memory seat module (mounted on underside of driver's seat) G302 (on lower left "b" pillar) Gnd Ground Heat mode select Heated seat pwr Heated seat therm sig Hi heat ind Hi heat indicator Hot at all times Lgm/dsm fuse 6 10a Low heat ind Low heat indicator Low ref Lt doors circuit breaker 2 25a Med heat ind Med heat indicator Rear fuse block (below left rear seat) Seats circuit breaker 8 30a Serial data Lumbar Wiring Diagram for Isuzu Ascender 2003 List of elements for Lumbar Wiring Diagram for Isuzu Ascender 2003: 16 Driver lumbar adjuster switch Driver seat lumbar horizonal motor Driver seat lumbar vertical motor G302 (on lower G303 (on lower Hot at all times Left "b" pillar) Out Passenger lumbar adjuster switch Passenger seat lumbar horizonal motor Passenger seat lumbar vertical motor Pnk Rear fuse block (below left rear seat) Right "b" pillar) Seats circuit breaker 8 30a Tan Passenger Heated Seat Wiring Diagram for Isuzu Ascender 2003 List of elements for Passenger Heated Seat Wiring Diagram for Isuzu Ascender 2003: 40 A12 B12 Back only ind Back only indicator Back only select Bat (+) Batt Batt (+) Batt + voltage C2 a3 C2 d1 Computer data lines system D10 Front passenger's door module (on lower part of passenger's door switch panel) G303 (on lower right "b" pillar) Gnd Ground Heat mode select Heated seat element ctrl Heated seat pwr Heated seat therm sig Hi heat ind Hi heat indicator Hot at all times Lgm/dsm fuse 6 10a Low heat ind Low heat indicator Low ref Med heat ind Med heat indicator Passenger back heated seat element Passenger cushion heated seat element Passenger heated seat thermistor Passenger's memory seat module (mounted on underside of passenger's seat) Pdm fuse 10a Rear fuse block (below left rear seat) Rt doors circuit breaker 1 25a Seats circuit breaker 8 30a Serial data Tan
POWER TOP/SUNROOF Power Top/Sunroof Wiring Diagram for Isuzu Ascender 2003 List of elements for Power Top/Sunroof Wiring Diagram for Isuzu Ascender 2003: 23 A battery A12 A12 hot with rap energized c3 B close Body control module (bcm) (beneath left rear seat, on rear fuse block) C open Close D gnd G302 (on lower left ``b" pillar) G306 (on body panel, left of rear door) Hot at all times Illum Interior lights system Low Nca Open Rap relay 22 Rear fuse block (below left rear seat) Sun roof module (above headliner, at rear of sun roof) Sun roof motor (above headliner, at rear of sunroof) Sun roof switch Sunroof fuse 28 20a Vent wdo fuse 20 20a
POWER WINDOWS Power Windows Wiring Diagram for Isuzu Ascender 2003 List of elements for Power Windows Wiring Diagram for Isuzu Ascender 2003: 57 (on lower left ``b" pillar) (on lower right ``b" pillar) A6 nca B5 nca B6 nca B7 nca B8 nca B9 nca Battery Body control module (bcm) (beneath left rear seat, on rear fuse block) Class 2 data Ddm fuse 10 10a Down Down input Down output Down signal output Driver window motor Driver's door module (on lower part of driver's door switch panel) Drivers window switch Front pass window switch Front passenger window motor Front passenger's door module (on lower part of passenger's door switch panel) G302 G303 Ground Hot at all times Illum Interior lights system Left rear window motor Left rear window switch Lockout indicator Lockout switch Lr down sig Lr lockout control Lr up sig Lt doors circuit breaker 2 25a Memory systems Motor down control Motor up control Rear fuse block (below left rear seat) Right rear window motor Right rear window switch Rr down sig Rr lockout control Rr up sig Rt doors circuit breaker 1 25a Splice pack sp205 Splice pack sp306 Switch power Switch pwr Tan Up input Up output Up signal output W/ memory seats Window dn Window up Rear Quarter Windows Wiring Diagram for Isuzu Ascender 2003 List of elements for Rear Quarter Windows Wiring Diagram for Isuzu Ascender 2003: 17 A12 Body control module (bcm) (beneath left rear seat, on rear fuse block) Close G302 (on lower left "b" pillar) G306 (on body panel, left of rear door) Hot at all times Illum Interior lights system Left quarter glass actuator Left quarter glass switch Nca Open Rap relay 22 Rear fuse block (below left rear seat) Right quarter glass actuator Right quarter glass switch Vent wdo fuse 20 20a
RADIO Base Radio Wiring Diagram, with Rear Seat Audio for Isuzu Ascender 2003 List of elements for Base Radio Wiring Diagram, with Rear Seat Audio for Isuzu Ascender 2003: 62 (near right front of lower console) g201 A10 A11 A12 Air conditioning system Am/fm Auxiliary rear seat audio/hvac control module B10 B11 B12 B6 b6 Body control module (bcm) (beneath left rear seat, on rear fuse block) G102 (at left side of engine compartment) Ground Hot at all times Hvac b fuse 36 10a Illum Inflatable restraint steering wheel module coil (in center hub of steering wheel) Interior lights system Left front door speaker Left front door tweeter speaker Left rear door speaker Lf out + Lf out - Lr low level audio sig + Lr low level audio sig - Lr out + Lr out - Lr speaker out + Lr speaker out - Mode Nca Pnk Power distribution system Radio Radio antenna Radio control signal Radio fuse 41 15a Rear fuse block (below left rear seat) Rf out + Rf out - Right front door speaker Right front door tweeter speaker Right rear door speaker Rr low level audio sig + Rr low level audio sig - Rr out + Rr out - Rr speaker out + Rr speaker out - Serial data Sp201 Splice pack sp205 Steering wheel control assembly (in steering wheel hub) Tan Twisted wires Volume down Volume up Volume/ am/fm switch W/ auto a/c W/ manual a/c Wiper/ washer system Base Radio Wiring Diagram, without Rear Seat Audio for Isuzu Ascender 2003 List of elements for Base Radio Wiring Diagram, without Rear Seat Audio for Isuzu Ascender 2003: 46 A10 A11 A12 Air conditioning system Am/fm B10 B11 B12 Body control module (bcm) (beneath left rear seat, on rear fuse block) G102 (at left side of engine compartment) Ground Hot at all times Illum Inflatable restraint steering wheel module coil (in center hub of steering wheel) Interior lights system Left front door speaker Left front door tweeter speaker Left rear door speaker Lf out + Lf out - Lr out + Lr out - Mode Nca Pnk Radio Radio antenna Radio control signal Radio fuse 41 15a Rear fuse block (below left rear seat) Rf out + Rf out - Right front door speaker Right front door tweeter speaker Right rear door speaker Rr out + Rr out - Serial data Splice pack sp205 Steering wheel control assembly (in steering wheel hub) Tan Twisted wires Volume down Volume up Volume/ am/fm switch Wiper/ washer system Premium Sound Radio Wiring Diagram (1 of 2) for Isuzu Ascender 2003 List of elements for Premium Sound Radio Wiring Diagram (1 of 2) for Isuzu Ascender 2003: 55 (near right front of lower console) g201 A10 A11 A12 A16 Air conditioning system Am/fm Auxiliary rear seat audio/hvac control module B10 B11 B12 B16 Bare Body control module (bcm) (beneath left rear seat, on rear fuse block) G102 (at left side of engine compartment) Ground Hot at all times Hvac b fuse 36 10a Illum Inflatable restraint steering wheel module coil (in center hub of steering wheel) Interior lights system Lf out + Lf out - Lr low level audio sig + Lr low level audio sig - Lr out + Lr out - Mode Nca Pnk Power distribution system Radio Radio antenna Radio control signal Radio fuse 41 15a Rear fuse block (below left rear seat) Rf out + Rf out - Rr low level audio sig + Rr low level audio sig - Rr out + Rr out - Serial data Sp201 Splice pack sp205 Splice pack sp306 Steering wheel control assembly (in steering wheel hub) Tan Twisted wires Volume down Volume up Volume/ am/fm switch W/ auto a/c W/ manual a/c Wiper/ washer system Premium Sound Radio Wiring Diagram (2 of 2) for Isuzu Ascender 2003 List of elements for Premium Sound Radio Wiring Diagram (2 of 2) for Isuzu Ascender 2003: 41 A a A10 A11 A12 Amp class 2 serial data Amp fuse 11 20a Audio amplifier (in rear compartment, behind left side panel) B10 B11 B12 Bare Drain wire G401 (on lower left "d" pillar) Ground Hot at all times Left front door speaker Left front i/p speaker Left rear door speaker Lf low lev aud sig + Lf low lev aud sig - Lf mid spkr out + Lf mid spkr out - Lf spkr out + Lf spkr out - Lr spkr out + Lr spkr out - Microphone Rear fuse block (below left rear seat) Rf low lev aud sig + Rf low lev aud sig - Rf mid spkr out + Rf mid spkr out - Rf spkr out + Rf spkr out - Right front door speaker Right front i/p speaker Right rear door speaker Rr spkr out + Rr spkr out - Tan Twisted wires Voice Recorder Wiring Diagram for Isuzu Ascender 2003 List of elements for Voice Recorder Wiring Diagram for Isuzu Ascender 2003: 12 C3 e1 Delete G302 (on lower left ``b" pillar) Ground Hot at all times Illum Interior lights system Oh batt/ on star fuse 27 10a Play Rear fuse block (below left rear seat) Rec Voice recorder (in upper console)
SHIFT INTERLOCK Ignition Lock Solenoid Wiring Diagram for Isuzu Ascender 2003 List of elements for Ignition Lock Solenoid Wiring Diagram for Isuzu Ascender 2003: 9 Automatic transmission shift lock actuator (in lower console) G201 (near right front of lower console) Hot in acc, run & start Ign 0 fuse 47 10a Ignition lock cylinder control actuator Ignition lock cylinder control switch Pnk Rear fuse block (below left rear seat) Sp201 Shift Interlock Wiring Diagram for Isuzu Ascender 2003 List of elements for Shift Interlock Wiring Diagram for Isuzu Ascender 2003: 15 (4.2l) (5.3l) A/t shift lock control solenoid Automatic transmission shift lock actuator (in lower console) Back-up fuse 27 15a Btsi fuse 25 10a E10 G201 (near right front of lower console) Hot in run & start Park lock solenoid Park/ neutral position switch (on left side of transmission) Pnk Sp201 Stoplamp switch (on brake pedal support) Underhood fuse block (on left side of engine compt)
STARTING/CHARGING Charging Wiring Diagram for Isuzu Ascender 2003 List of elements for Charging Wiring Diagram for Isuzu Ascender 2003: 25 (4.2l: on left front of engine) (5.3l: on left front of engine compt) powertrain control module (pcm) (not used) 4.2l 5.3l Battery Battery voltage Charge indicator Class 2 Class 2 data Field duty cycle sig Fusible link (8 ga- red) G101 (at left side of engine compt) G106 (on left front wheelwell) G110 (on lower left side of engine) Generator Generator on signal Hot at all times Instrument panel cluster (ipc) Ipc/dic fuse 24 10a Power distribution system Red Splice pack sp205 Starter Starter solenoid Underhood fuse block (on left side of engine compt) Starting Wiring Diagram for Isuzu Ascender 2003 List of elements for Starting Wiring Diagram for Isuzu Ascender 2003: 33 4.2l 5.3l A10 Acc run Batt Battery Crank fuse 17 10a Crank sig req Crank volt F10 F11 Fusible link (8 ga- red) G101 (at left side of engine compt) G106 (on left front wheelwell) G110 (on lower left side of engine) Generator Hot in run or start Ign a fuse 34 40a Ign e fuse 22 10a Ignition switch Lock P/n Park/ neutral position (pnp) switch (on left side of transmission) Pnk Powertrain control module (pcm) (4.2l: on left front of engine) (5.3l: on left front of engine compt) Red Start Starter Starter motor Starter relay 47 Starter rly Starter solenoid Underhood fuse block (on left side of engine compt)
SUPPLEMENTAL RESTRAINTS Supplemental Restraints Wiring Diagram for Isuzu Ascender 2003 List of elements for Supplemental Restraints Wiring Diagram for Isuzu Ascender 2003: 49 (on lower left "b" pillar) g302 12v A10 A11 A12 A13 A14 A15 A16 A17 A18 Air bag B10 C1 a1 Case ground Class 2 serial data Data link connector (dlc) (partial) (below dash, above accelerator pedal) Discriminating signal Driver seat belt buckle switch (in seat belt buckle assembly) G102 (at left side of engine compartment) Ground High control Hot in run & start Ignition 1 voltage Inflatable restraint i/p module Inflatable restraint sensing & diagnostic module (sdm) (beneath lower console) Inflatable restraint steering wheel module Inflatable restraint steering wheel module coil Instrument panel cluster (ipc) Left electronic frontal sensor (efs) Left front inflatable restraint side impact module (in left front door) Left inflatable restraint side impact sensor (sis) (in left front door) Low control Low reference Nca Pnk Right electronic frontal sensor (efs) Right front inflatable restraint side impact module (in right front door) Right inflatable restraint side impact sensor (sis) (in right front door) Seat belt switch Sensor signal Sensor voltage Shorting clip Sir fuse 18 10a Splice pack sp205 (below left side of dash) Stage 1 Stage 2 Tan Underhood fuse block (on left side of engine compartment)
TRANSMISSION Transfer Case Wiring Diagram for Isuzu Ascender 2003 List of elements for Transfer Case Wiring Diagram for Isuzu Ascender 2003: 73 (below dash, above accelerator pedal) data link connector (on lower left side of engine) +5v ref +8v ref 1.1k 2 hi 2 hi ind 2.2k 2wd 4 hi 4 hi ind 4 lo 4 lo ind 4.2l 4wd fuse 48 15a 4wd lo sig 5.1k 5.3l Afwd Afwd ind Atc fuse 8 25a Axle act Axle sw B11 Battery Brake C2 a11 Class 2 data E11 E5 c3 Encoder Encoder gnd Encoder p Front axle actuator (lower right front of engine, on oil pan) Front sig hi Front sig lo G102 (left side of engine compt) G107 G201 Ground Hot at all times Hot in run Hot in run or start Ing e fuse 22 10a Instrument panel cluster (ipc) Interior lights system Lock sol Logic Motor Motor ctrl a Motor ctrl b Neut Neutral Neutral ind Pnk Powertrain control module (4.2l: left front of engine) (5.3l: left front of engine compt) Propshaft speed sensor (left front) (left front of transfer case) Propshaft speed sensor (rear) (right rear of transfer case) Rear fuse block (below left rear seat) Rear sig hi Rear sig lo Red Service 4wd/ awd Sp201 (right front of lower console) Splice pack sp205 (behind left side of dash) Stoplamp switch, traction control switch, multi- function switch, rearview mirror Sw sig Tan Transfer case Transfer case shift control module (behind lower left side of dash) Transfer case shift control switch Under- hood fuse block (left side of engine compt) Underhood fuse block (left side of engine compt)
4.2L 4.2L, A/T Wiring Diagram for Isuzu Ascender 2003 List of elements for 4.2L, A/T Wiring Diagram for Isuzu Ascender 2003: 91 1-2 shift red solenoid valve 2-3 shift red solenoid valve 3-2 shift red solenoid valve 4wd circuit (w/ 2-spd transfer case) 4wd lo A2 c1 Accelerator pedal position sensor (on accelerator bracket) App 1 +5v App 1 lo App 1 sig App 2 +5v App 2 lo App 2 sig Automatic trans- mission fluid pressure manual valve position switch Automatic transmission Automatic transmission fluid temperature sensor Automatic transmission shift lock actuator Battery Body control module (bcm) (beneath left rear seat) C2 a7 Class 2 data D2 c1 D2 sw D3 sw D4 sw Data link connector (below dash, above accelerator pedal) Down (3-2) E3 c2 Ect ref Ect sig Engine coolant temperature sensor (left front of engine, near generator) Etc fuse 23 10a F14 G108 (lower left side of engine) Ground Hot at all times Hot in accy, run or start Hot in run or start Ign 0 fuse 47 10a Ignition Ignition 1 Ing e fuse 22 10a Instrument panel cluster (ipc) Lo sw Mil ind P r n d Park/neutral position switch (left side of transmission) Pcm 1 fuse 28 15a Pcm b fuse 10 20a Pcs sol (hi) Pcs sol (lo) Pnk Powertrain control module (left front of engine) Pressure control solenoid valve Prndl a in Prndl b in Prndl c in Prndl p in Rear fuse block (below left rear seat) Red Rev sw Service engine soon Solenoid Splice pack sp205 (behind left side of dash) Ss a (1-2) Ss b (2-3) Stop lamp switch, traction control switch, multi- function switch, rearview mirror Stoplamp in Tan Tcc Tcc pmw red Tcc pwm Tcc red Tfp sw a Tfp sw b Tfp sw c Tft ref Tft sig Throttle body (on throttle body) Tp 1 +5v Tp 1 lo Tp 1 sig Tp 2 +5v Tp 2 lo Tp 2 sig Trailer brake control unit Underhood fuse block (left side of engine compt) Veh stop fuse 34 15a Vehicle speed sensor (2wd: right rear of trans) (4wd: left rear of transfer case) Vss (hi) Vss (lo)
5.3L 5.3L, A/T Wiring Diagram for Isuzu Ascender 2003 List of elements for 5.3L, A/T Wiring Diagram for Isuzu Ascender 2003: 74 1-2 shift red solenoid valve 2-3 shift red solenoid valve 3-2 shift red solenoid valve 4wd circuit (w/ 2-spd transfer case) 4wd lo Automatic trans- mission fluid pressure manual valve position switch Automatic transmission Automatic transmission fluid temperature sensor Automatic transmission shift lock actuator Battery Body control module (bcm) (beneath left rear seat) C1 d2 C1 f5 C2 e3 Class 2 data D2 sw D3 sw D4 sw Data link connector (below dash, above accelerator pedal) Down (3-2) Ect ref Ect sig Engine coolant temperature sensor (left front of engine, near generator) F14 G108 (lower left side of engine) Ground Hot at all times Hot in accy, run or start Hot in run or start Ign 0 fuse 47 10a Ignition Ignition 1 Ing e fuse 22 10a Instrument panel cluster (ipc) Lo sw Mil ind P r n d Park/neutral position switch (left side of transmission) Pcm 1 fuse 28 10a Pcm b fuse 10 20a Pcs sol (hi) Pcs sol (lo) Pnk Powertrain control module (left front of engine compt) Pressure control solenoid valve Prndl a in Prndl b in Prndl c in Prndl p in Rear fuse block (below left rear seat) Red Rev sw Serial data Service engine soon Solenoid Splice pack sp205 (behind left side of dash) Ss a (1-2) Ss b (2-3) Stop lamp switch, traction control switch, multi- function switch, rearview mirror Tan Tcc Tcc pmw red Tcc pwm Tcc red Tfp sw a Tfp sw b Tfp sw c Tft ref Tft sig Throttle actuator control (tac) module Underhood fuse block (left side of engine compt) Vehicle speed sensor (2wd: right rear of trans) (4wd: left rear of transfer case) Vss (hi) Vss (lo)
WARNING SYSTEMS Warning Systems Wiring Diagram for Isuzu Ascender 2003 List of elements for Warning Systems Wiring Diagram for Isuzu Ascender 2003: 62 (4.2l) (5.3l) (below left rear seat) rear fuse block (on lower left "b" pillar) g302 4.2l 5.3l A12 A15 Auto B10 Battery + Belt sw input Body control module (bcm) (beneath left rear seat, on rear fuse block) Class 2 serial data Computer data lines system Door ajar Dr ajar input Driver miniwedge (door jamb switch) Driver's door module (on lower part of driver's door switch panel) Drl defeat E12 c2 E6 c2 F10 Front passenger miniwedge (door jamb switch) Front passenger's door module (on lower part of passenger's door switch panel) G102 (at left side of engine compt) G201 (near right front of lower console) G302 (on lower left "b" pillar) G303 (on lower right "b" pillar) Hdlmp on sig Head Headlamp switch Hot at all times Ignition key alarm switch (in steering column) Inflatable restraint sensing & diagnostic module (beneath lower console) Instrument panel cluster (ipc) Key in ign sw Left rear miniwedge (door jamb switch) Liftgate ajar sw Liftgate ajar switch Liftgate module (inside liftgate) Liftglass ajar sw Liftglass ajar switch (inside top of liftgate) Logic Low reference Lr dr ajar sig Nca Park Park lamp sw on input Powertrain control module (pcm) (4.2l: on left front of engine) (5.3l: on left front of engine compt) Radio Right rear miniwedge (door jamb switch) Rr dr ajar sig Seat belt buckle switch (in seat buckle assembly) Seat belt indicator Serial data Splice pack sp201 Sw low reference Tail gate ajar ind Tan Tbc 1 fuse 31 10a Underhood fuse block (on left side of engine compt)
WIPER/WASHER Front Wiper/Washer Wiring Diagram for Isuzu Ascender 2003 List of elements for Front Wiper/Washer Wiring Diagram for Isuzu Ascender 2003: 39 A12 Acc voltage Accessory voltage Body control module (bcm) (beneath left rear seat, on rear fuse block) D10 Front window wiper motor (under cowl cover) Frt wpr fuse 33 25a G102 (at left side of engine compt) G103 (at right rear of engine compt) G105 (at left side of engine compt) G302 (on lower left "b" pillar) Ground High Hot at all times Hot in acc or on Lo delays mist Lsd Mist Off Outside moisture sensor (attached to windshield, near inside rearview mirror) Outside moisture sensor signal 1 Pnk Pulse Rain fuse 29 10a Rear fuse block (below left rear seat) Red Sensor signal 1 Tan Turn signal/ multifunction switch Underhood fuse block (on left side of engine compt) W/s wash fuse 9 15a W/s wash relay 42 Wash Windshield washer fluid pump (in engine compt, attached to fluid reservoir) Windshield washer relay cntrl Windshield wiper switch high signal Windshield wiper switch signal 1 Windshield wiper switch signal 2 Windshield wiper/ washer switch Rear Wiper/Washer Wiring Diagram for Isuzu Ascender 2003 List of elements for Rear Wiper/Washer Wiring Diagram for Isuzu Ascender 2003: 32 5 volt reference Battery positive voltage Body control module (bcm) (beneath left rear seat, on rear fuse block) Class 2 ser data Cont Dly 1 Dly 2 G103 (at right rear of engine compt) G401 (on lower left "d" pillar) Hot at all times Illumination Interior lights system Liftgate module (inside liftgate) Off Rear fuse block (below left rear seat) Rear wash relay 38 Rear window motor speed signal Rear window mtr speed signal c2 Rear window washer fluid pump (in engine compt, attached to fluid reservoir) Rear window washer relay ctrl Rear window wiper motor (inside liftgate) Rear window wiper sw sig Rear window wiper/washer switch Rr wiper circuit breaker 9 15a Sound systems Sp205 Sp306 Underhood fuse block (on left side of engine compt) W/ steering wheel controls W/o steering wheel controls Wash Wash fuse 7 20a
