ENGINE PERFORMANCE – Isuzu Ascender S 2008 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.2L

4.2L, Engine Performance Wiring Diagram (1 of 5) for Isuzu Ascender S 2008

List of elements for 4.2L, Engine Performance Wiring Diagram (1 of 5) for Isuzu Ascender S 2008:

• (at rear of fuel tank) evaporative emission (evap) canister vent solenoid
• (in chassis harness, 13 cm before breakout to fuel pump & sender assembly) j359
• 4wd lo sig
• 5v ref
• A/c clutch rly
• Accel sw sig
• Accelerator pedal position (app) sensor
• Air conditioning system
• Air injection ctrl
• Anti-lock brakes system
• App sens 1 sig
• App sens 2 sig
• Batt pos volt
• Change engine oil ind
• Chmsl ctrl
• Class 2 ser data
• Computer data lines system
• Crank volt
• Crankshaft position (ckp) sensor (on left rear of engine block, below starter)
• Cruise control system
• Cruise ctrl set
• Cruise on sw sig
• Ecm fuse 29 10a
• Ecm i fuse 28 15a
• Eng spd sig
• Engine control module (ecm) (near lower left front of engine)
• Evap sol ctrl
• Fuel lvl sens sig
• Fuel pmp rly ctrl
• Fuel tank pressure (ftp) sensor (at top left rear of fuel tank)
• Fuel tank sens
• Hot at all times
• Hot in acc, run or start
• Hot in run or start
• Ign
• Ign 0 fuse 47 10a
• Ign e fuse 22 10a
• Ign volt
• Instrument cluster system
• Instrument panel cluster (ipc)
• J239
• J320
• Knock sensor (ks) 1 (on lower left front of engine block)
• Knock sensor (ks) 2 (on lower left rear of engine block)
• Lo ref
• Logic
• Low engine oil pressure ind
• Malfunction ind lamp (mil)
• Mil ctrl
• Pnk
• Pwrtrain rly ctrl
• Rear fuse block (below left rear seat)
• Reduce engine power ind
• Starter rly ctrl
• Starting/ charging system
• Tan
• Tcc brake sw
• Tcm cnstr fuse 15 10a
• Transmissions system
• Underhood fuse block (above left front wheelwell)
• Vehicle spd sig

4.2L, Engine Performance Wiring Diagram (2 of 5) for Isuzu Ascender S 2008

List of elements for 4.2L, Engine Performance Wiring Diagram (2 of 5) for Isuzu Ascender S 2008:

• Air pump fuse 56 60a
• Air sol fuse 54 15a
• Air sol relay
• Camshaft actuator solenoid assembly (on right front of cylinder head)
• Camshaft position (cmp) sensor (on right front of engine block)
• D12
• E12
• Fuel injectors (top of engine)
• Fuel pump & sender assembly (top of fuel tank)
• Fuel pump relay
• G107 (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
• J111
• J306
• Nca
• Pcm b fuse 10 20a
• Pnk
• Red
• Red a
• Secondary air injection (air) pump (left front of chassis, near electronic brake control module)
• Secondary air injection (air) pump relay (left front of chassis)
• Underhood fuse block (above left front wheelwell)

4.2L, Engine Performance Wiring Diagram (3 of 5) for Isuzu Ascender S 2008

List of elements for 4.2L, Engine Performance Wiring Diagram (3 of 5) for Isuzu Ascender S 2008:

• 12v ref
• 5v ref
• Camshaft hi ctrl
• Ckp sens sig
• Cmp sens sig
• Engine control module (ecm) (near lower left front of engine)
• Fuel inj 1 ctrl
• Fuel inj 2 ctrl
• Fuel inj 3 ctrl
• Fuel inj 4 ctrl
• Fuel inj 5 ctrl
• Fuel inj 6 ctrl
• G108 (on lower left side of engine)
• Gnd
• Ho2s hi sig
• Ho2s htr lo ctrl
• Ho2s lo sig
• Iat sens sig
• Ic 1 ctrl
• Ic 2 ctrl
• Ic 3 ctrl
• Ic 4 ctrl
• Ic 5 ctrl
• Ic 6 ctrl
• Ign volt
• J101
• Ks 1 sig
• Ks 2 sig
• Lo oil pres sw sig
• Lo ref
• Maf sens sig
• Mass air flow (maf) sensor/intake air temperature (iat) sensor (in air intake duct)
• Pnk
• Red
• Starter rly ctrl
• Tac motor ctrl 1
• Tac motor ctrl 2
• Tan
• Tp sens 1 sig
• Tp sens 2 sig

4.2L, Engine Performance Wiring Diagram (4 of 5) for Isuzu Ascender S 2008

List of elements for 4.2L, Engine Performance Wiring Diagram (4 of 5) for Isuzu Ascender S 2008:

• (in engine harness, 22 cm before breakout to map sensor)
• (top of engine)
• A11
• C11
• Eng i fuse 26 15a
• Etc fuse 23 15a
• F10
• F11
• G109 (on lower left side of engine)
• Heated oxygen sensor (ho2s) 1 (on exhaust manifold, on right side of engine)
• Heated oxygen sensor (ho2s) 2 (downstream of catalytic converter on exhaust pipe)
• Hot at all times
• Ignition coil 1
• Ignition coil 2
• Ignition coil 3
• Ignition coil 4
• Ignition coil 5
• Ignition coil 6
• Inj a fuse 31 20a
• Inj b fuse 56 20a
• J102
• J128
• Nca
• O2 snsr a fuse 55 10a
• O2 snsr b fuse 54 10a
• Pnk
• Pnk a
• Pwr/ trn relay 57
• Spark plug
• Tan
• Underhood fuse block (above left front wheelwell)

4.2L, Engine Performance Wiring Diagram (5 of 5) for Isuzu Ascender S 2008

List of elements for 4.2L, Engine Performance Wiring Diagram (5 of 5) for Isuzu Ascender S 2008:

• (on upper left side of engine) manifold absolute pressure sensor
• 5v ref
• A/c press sens
• Air conditioning system
• Air injection ctrl
• Air pump rly ctrl
• Anti-lock brakes system
• Computer data lines system
• Delivered torq sig
• Ect sens sig
• Engine control module (ecm) (near lower left front of engine)
• Engine coolant temperature (ect) sensor (lower right rear of engine block)
• Engine oil pressure (eop) switch (at lower right of engine block)
• Evap canister ctrl
• Evaporative emission (evap) canister purge solenoid (lower left side of engine)
• Front sig hi
• G107 (on lower left side of engine)
• Gen field sig
• Gen regu ctrl
• Hi spd data bus +
• Hi spd data bus -
• J101
• Lo ref
• Map sens sig
• Nca
• Oil press sw sig
• Pnk
• Pnp sw sig
• Red
• Request torq sig
• Sec air inj sens
• Secondary air injection (air) pump relay (left front of chassis)
• Starting/charging system
• Tan
• Throttle body (front of intake duct)
• Transmissions system