ENGINE PERFORMANCE – Isuzu Ascender S 2005 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.2L

4.2L, Engine Performance Wiring Diagram (1 of 5) for Isuzu Ascender S 2005

List of elements for 4.2L, Engine Performance Wiring Diagram (1 of 5) for Isuzu Ascender S 2005:

• start enable rly
• (on lower left side of engine) g107
• 4wd low sig
• 5 volt ref
• A/c compr rel
• A/c press sens
• Accelerator pedal position (app) sensor (w/ eap: under left side of i/p) (w/o eap: on accelerator bracket)
• Air conditioning system
• Air fuse 56 60a
• Air pump relay
• Air sol fuse 54 15a
• Air sol relay
• Anti lock brakes system
• App sens 1 sig
• App sens 2 sig
• B10
• Battery
• Body control module (bcm) (beneath left rear seat, on rear fuse block)
• Cc on sw input
• Cls 2 data
• Cool fan clutch
• Cooling fan sp
• Cooling fans system
• Crank req sig
• Crank voltage
• Cruise control system
• Cruise control system transmissions system
• D11
• Data link connector (below dash, above accelerator pedal)
• E11
• Eng spd sig out
• Etc/tcc brk sig
• F14
• Fuel lvl sens sig
• Fuel tank press
• Fuel tank pressure sensor (at top left rear of fuel tank)
• G305 (on outside of left frame rail, near fuel tank)
• Hot at all times
• Hot in acc, run or start
• Hot in run or 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 (iat) sensor (in air intake duct,
• Lo ref
• Low ref
• Malfunction indicator lamp
• Mil ctrl
• On top right of engine)
• Pcm b fuse 10 20a
• Pnk
• Powertrain control module (pcm) (on left front of engine)
• Rear fuse block (below left rear seat)
• Red
• Res/acc sw
• Secondary air injection (air) pump (on left frame rail, near ebcm)
• Secondary air injection (air) pump relay (on left frame rail, near ebcm)
• Secondary air injection (air) solenoid
• Set/cruise sw
• Sp205 (below left side of i/p)
• Starting/ charging system
• Stop lamp volt
• Stoplamp switch (w/o eap: on brake pedal support) (w/ eap: top of brake pedal bracket)
• Tan
• Underhood fuse block (on left side of engine compartment)
• Vss
• Vss signal out

4.2L, Engine Performance Wiring Diagram (2 of 5) for Isuzu Ascender S 2005

List of elements for 4.2L, Engine Performance Wiring Diagram (2 of 5) for Isuzu Ascender S 2005:

• A11
• Eng 1 fuse 26 10a
• Engine oil pressure switch (on bottom right side of engine)
• Evaporative emission (evap) canister purge solenoid (left side of engine)
• Evaporative emission canister vent solenoid (rear of fuel tank)
• F/pmp relay
• Fuel pump & sender assembly
• G107 (on lower left side of engine)
• 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
• Park/neutral position switch (on left side of transmission)
• Pcm b fuse 10 20a
• Pnk
• Pnk a
• Under- hood fuse block (on left side of engine compt)
• Vehicle speed sensor (2wd: on right rear of transmission) (4wd: on left rear of transfer case)

4.2L, Engine Performance Wiring Diagram (3 of 5) for Isuzu Ascender S 2005

List of elements for 4.2L, Engine Performance Wiring Diagram (3 of 5) for Isuzu Ascender S 2005:

• (on right front of cylinder head) crankshaft position (cmp) 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 (on right front of cylinder head)
• Ckp sens sig
• Deliv torque sig
• Ect sens sig
• Engine coolant temperature (ect) sensor (left front of engine, near generator)
• 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
• Fuel pump rly ctrl
• G108 (on lower left side of engine)
• Gfd cyc sig
• Ground powertrain control module (pcm) (on left front of engine)
• H02 hi sig b1 s2
• H02s hi sig b1 s1
• H02s lo sig b1 s2
• Heated oxygen sensor 1 (right side of engine, on exhaust manifold)
• Heated oxygen sensor 2 (in exhaust pipe, adjacent to transmission)
• Ho2s htr lo b1 s1
• Ho2s htr lo b1 s2
• Ho2s lo sig b1 s1
• Hot at all times
• Hot in run or 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 (map) sensor (on upper left side of engine)
• Map sens sig
• Nca
• O2 fuse 29 10a
• Oil pres sw sig
• Pc sol high ctrl
• Pc sol low ctrl
• Pcm 1 fuse 28 15a
• Pnk
• Powertrain control module (pcm) (on left front of engine)
• Req torque sig
• Starting/ charging system
• Tan
• Tcc pwm sol
• Tcc sol vlv ctrl
• Trans range sw a
• Underhood fuse block (on left side of engine compartment)
• Vss high sig
• Vss low signal

4.2L, Engine Performance Wiring Diagram (4 of 5) for Isuzu Ascender S 2005

List of elements for 4.2L, Engine Performance Wiring Diagram (4 of 5) for Isuzu Ascender S 2005:

• Automatic
• Automatic transmission
• Automatic transmission fluid pressure manual valve position switch
• C10
• Ctrl
• D10
• D2 sw
• D3 sw
• D4 sw
• E10
• F10
• G109 (on lower side of engine)
• Gnd
• Ign
• Ignition coils (top of engine)
• 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
• Underhood fuse block (on left side of engine compartment)
• Valve

4.2L, Engine Performance Wiring Diagram (5 of 5) for Isuzu Ascender S 2005

List of elements for 4.2L, Engine Performance Wiring Diagram (5 of 5) for Isuzu Ascender S 2005:

• (not used)
• 12v ref
• 5v ref
• Air solenoid relay
• Camshaft position (cmp) sensor (on right front of cylinder head)
• Cmp sens sig
• Cooling fans system
• Damping l/d sig
• Gen turn on sig
• Hot in run or start
• Ign 1 voltage
• Knock sensor 1 (front) (on lower left front of engine block)
• Knock sensor 2 (rear) (on lower left rear of engine block)
• Ks 1 sig
• Ks 2 sig
• Low oil press sw
• Low ref
• Pnk
• Powertrain control module (pcm) (on left front of engine)
• Red
• Starting/charging system
• Tac fuse 23 10a
• 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)
• Tp sens 1 sig
• Tp sens 2 sig
• Trs sig b
• Trs sig c
• Trs sig p
• Underhood fuse block (on left side of engine compartment)

5.3L

5.3L, Engine Performance Wiring Diagram (1 of 5) for Isuzu Ascender S 2005

List of elements for 5.3L, Engine Performance Wiring Diagram (1 of 5) for Isuzu Ascender S 2005:

• (not used)
• 5 volt
• A/c ref pre sen
• A/c refrigerant pressure sensor (on bottom right side of engine)
• A12
• Anti-lock brakes system
• App sens 1
• App sens 2
• Battery
• Computer data lines system
• Cool fan clu ctrl
• Cool fan speed sig
• Cooling fans system
• Crank fuse 17 10a
• Crank volt
• Cruise control system
• Cruise on sw sig
• Ecm i fuse 10a
• Eng speed sig
• Engine control module (ecm) (on left front of engine compt)
• Engine speed
• Evap can
• Evaporative emission (evap) canister vent solenoid (rear of fuel tank)
• Exterior lights system
• Ftp sens
• Fuel lvl sens sig
• Fuel pump & sender assembly
• Fuel pump rly
• Fuel tank pressure (ftp) sensor (at top left rear of fuel tank)
• Fuel/ pmp relay
• G107 (lower left side of engine)
• G305 (on outside of left frame rail, near fuel tank)
• Hot at all times
• Hot in run or start
• Hot in start
• Ign 0 volt
• Ign 1 volt
• Ign e fuse 10a
• Instrument cluster system
• Instrument panel cluster
• Logic
• Low ref
• Malfunction indicator lamp
• Mil ctrl
• Pcm b fuse 10 20a
• Pnk
• Pnp sw
• Pwr diag
• Res/acc sw sig
• Serial data
• Serial data 2
• Set/coast sw sig
• St/lp fuse 12 25a
• Start relay
• Starting/charging system
• Stop lamp volts
• Stoplamp switch (w/o eap: on brake pedal support) (w/ eap: top of brake pedal bracket)
• Tan
• Tcc brake sw
• Tcm/ canister fuse 15 10a
• Underhood fuse block (on left side of engine compt)
• Vss

5.3L, Engine Performance Wiring Diagram (2 of 5) for Isuzu Ascender S 2005

List of elements for 5.3L, Engine Performance Wiring Diagram (2 of 5) for Isuzu Ascender S 2005:

• (on brake booster) brake booster vacuum sensor
• (w/ eap: under lfet side of i/p) (w/o eap: on accelerator bracket) accelerator pedal position (app) sensor
• 4wd lo sig
• 5 volt
• A/c comp rly
• Air conditioning system
• Anti-lock brakes system
• Brk booster
• Cooling fans system
• Cylinder shutoff solenoid 1
• Cylinder shutoff solenoid 2
• Cylinder shutoff solenoid 3
• Cylinder shutoff solenoid 4
• Del torque
• Engine control module (ecm) (on left front of engine compt)
• Front hi sig
• Ho2s hi sig
• Ho2s htr lo
• Ho2s htr sig
• Ho2s lo sig
• Hot in acc, run or start
• Iat sensor
• Ign 0 fuse 47 10a
• Low ref
• Maf sensor
• Pnk
• Rear fuse block (below left rear seat)
• Req torq
• Tan
• Transmissions system
• Valve lifter oil manifold (vlom) assembly
• Veh stop fuse 34 15a

5.3L, Engine Performance Wiring Diagram (3 of 5) for Isuzu Ascender S 2005

List of elements for 5.3L, Engine Performance Wiring Diagram (3 of 5) for Isuzu Ascender S 2005:

• (on left side of engine compt) underhood fuse block
• (on right rear of engine, near starter) crankshaft position (ckp) sensor
• (on top of of engine)
• (on top rear of engine, near transmission) camshaft position (cmp) sensor
• (on top rear of engine, near transmission) engine oil pressure (eop) sensor
• A11
• C11
• Ecm fuse 29 10a
• Eng i fuse 26 15a
• Evaporative emission (evap) canister purge solenoid
• F10
• F11 f11
• G108 (lower left side of engine)
• Heated oxygen sensor (ho2s) bank 1 sensor 1 (on left bank exhaust pipe, ahead of catalytic converter)
• Heated oxygen sensor (ho2s) bank 1 sensor 2 (on left bank exhaust pipe, behind catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 1 (on right bank of exhaust pipe, ahead of catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 2 (on right bank exhaust pipe, behind catalytic converter)
• Hot at all times
• Iat
• Inj a fuse 31 20a
• Inj b fuse 56 20a
• Maf
• Mass airflow (maf)/intake air temperature (iat) sensor (in air intake duct)
• Nca
• O2a fuse 55 10a
• O2b fuse 54 10a
• Pnk
• Pnk pnk
• Powertrain relay 60
• Red
• Tac fuse 23 15a
• Tan
• Underhood fuse block (on left side of engine compt)

5.3L, Engine Performance Wiring Diagram (4 of 5) for Isuzu Ascender S 2005

List of elements for 5.3L, Engine Performance Wiring Diagram (4 of 5) for Isuzu Ascender S 2005:

• Fuel injectors
• Left knock sensor (ks) 1 (left side of engine)
• Manifold absolute pressure (map) sensor (on top of engine)
• Pnk
• Red
• Tan
• Throttle body

5.3L, Engine Performance Wiring Diagram (5 of 5) for Isuzu Ascender S 2005

List of elements for 5.3L, Engine Performance Wiring Diagram (5 of 5) for Isuzu Ascender S 2005:

• (left side of engine)
• 12 volt ref
• 5 volt ref
• Ckp sensor
• Cmp sensor
• Ctrl
• Cyl shut sol 1
• Cyl shut sol 2
• Cyl shut sol 3
• Cyl shut sol 4
• Ect sens sig
• Engine control module (ecm) (on left front of engine compt)
• Engine coolant temperature (ect) sensor (left front of engine)
• Evap can sol
• Fuel inj 1 ctrl
• Fuel inj 2 ctrl
• Fuel inj 3 ctrl
• Fuel inj 4 ctrl
• Fuel inj 5 ctrl
• Fuel inj 6 ctrl
• Fuel inj 7 ctrl
• Fuel inj 8 ctrl
• G109
• Gen field
• Gnd
• Ho2s heater lo
• Ho2s hi
• Ho2s hi sig
• Ho2s htr lo
• Ho2s low
• Ho2s low sig
• Ign
• Ign ctrl 1
• Ign ctrl 2
• Ign ctrl 3
• Ign ctrl 4
• Ign ctrl 5
• Ign ctrl 6
• Ign ctrl 7
• Ign ctrl 8
• Ignition coils
• Ks 1 sens sig
• Ks 2 sensor sig
• Low ref
• Map sensor
• Nca
• Nca nca
• Oil press
• Pnk
• Red
• Ref lo
• Right knock sensor (ks) 2 (right side of engine)
• Spark plug
• Starting/ charging system
• Tac mtr ctrl 1
• Tac mtr ctrl 2
• Tan
• Tp sens 1 sig
• Tp sens 2 sig