ENGINE PERFORMANCE – Isuzu Ascender S 2004 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.2L

4.2L, Engine Performance Wiring Diagram (1 of 5) for Isuzu Ascender S 2004

List of elements for 4.2L, Engine Performance Wiring Diagram (1 of 5) for Isuzu Ascender S 2004:

• (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
• Crank voltage
• Cruise control system
• D11
• Data link connector (below dash, above accelerator pedal)
• E11
• Eng spd sig out
• F14
• 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 & 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, on 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 (pcm) (on left front of engine)
• Prim fuel lvl
• Rear fuse block (below left rear seat)
• Red
• Res/acc sw
• Secondary air injection (air) pump
• Secondary air injection (air) pump relay
• Secondary air injection (air) solenoid
• Set/cruise sw
• Sp205 (below left side of i/p)
• Starting/ charging system
• Stop lamp volt
• Stoplamp switch (on brake pedal support)
• Strt enable rel
• Tan
• Tcc rel sw sig
• Transmissions system
• 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 2004

List of elements for 4.2L, Engine Performance Wiring Diagram (2 of 5) for Isuzu Ascender S 2004:

• 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 & start
• Park/neutral position switch (on lower left side of transmission)
• Pcm b fuse 10 20a
• Pnk
• Pnk a
• Under- hood fuse block
• Under- hood fuse block (on left c1 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 2004

List of elements for 4.2L, Engine Performance Wiring Diagram (3 of 5) for Isuzu Ascender S 2004:

• (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
• 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 & 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
• 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)
• Prim fuel pmp rel
• Req torque sig
• Starting/ charging system
• Tan
• Tcc pwm sol
• Tcc sol vlv ctrl
• Trns rg sw sig 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 2004

List of elements for 4.2L, Engine Performance Wiring Diagram (4 of 5) for Isuzu Ascender S 2004:

• 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 2004

List of elements for 4.2L, Engine Performance Wiring Diagram (5 of 5) for Isuzu Ascender S 2004:

• (not used)
• 12v ref
• 5v ref
• Air conditioning system
• Air solenoid relay
• Camshaft position (cmp) sensor (on right front of cylinder head)
• Cmp 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) (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 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 2004

List of elements for 5.3L, Engine Performance Wiring Diagram (1 of 5) for Isuzu Ascender S 2004:

• (on right rear of engine) crankshaft position (ckp) sensor
• +5v
• 12 volt ref
• 3-2 ss ctrl
• Air conditioning system
• Anti-lock brakes system
• Batt volt
• C12
• Ckp sig
• Cls 2 data
• Cmp sig
• Computer data lines system
• Cool fan ctch
• 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 (top left side of engine)
• Ks 1 signal
• Ks 2 signal
• Low ref
• Low ref (a/t)
• O2b fuse 53 15a
• O2c fuse 54 15a
• Pcm b fuse 10 20a
• Pnk
• Pnk a
• Powertrain control module (pcm) (on left front of engine compartment)
• Prnd a sig
• Prnd b sig
• Prnd p sig
• Range b
• Range c
• Rear fuse block (below left rear seat)
• Red
• Req torq sig
• Rly ctrl
• Serial data
• Starting/ charging system
• Tan
• Tcc/brk sig
• Under- hood fuse block (on left c2 side of engine compt)

5.3L, Engine Performance Wiring Diagram (2 of 5) for Isuzu Ascender S 2004

List of elements for 5.3L, Engine Performance Wiring Diagram (2 of 5) for Isuzu Ascender S 2004:

• A11
• Engine coolant temperature (ect) sensor (left front of engine)
• F/pmp relay
• Fuel pump & sender assembly
• G107 (lower left side of engine)
• G108 (lower left side of engine)
• G305 (on outside of left frame rail, near fuel tank)
• Heated oxygen sensor (bank 1 sensor 1) (on left bank exhaust pipe, ahead of catalytic converter)
• Heated oxygen sensor (bank 1 sensor 2) (on left bank exhaust pipe, behind catalytic converter)
• Heated oxygen sensor (bank 2 sensor 1) (on right bank exhaust pipe, ahead of catalytic converter)
• Heated oxygen sensor (bank 2 sensor 2) (on right bank exhaust pipe, behind catalytic converter)
• Hot at all times
• Knock sensor 1 (left)
• Knock sensor 2 (right)
• Nca
• Park/neutral position switch (on left side of transmission)
• Pcm b fuse 10 20a
• Pnk
• Pnk d
• Red
• Tan
• Tan a
• Under- hood fuse block (on left side of engine compt)

5.3L, Engine Performance Wiring Diagram (3 of 5) for Isuzu Ascender S 2004

List of elements for 5.3L, Engine Performance Wiring Diagram (3 of 5) for Isuzu Ascender S 2004:

• 1-2 sol vlv
• 2-3 sol vlv
• 3-2 sol vlv
• A red
• A/t fluid pressure manual valve position switch
• Automatic transmission
• Camshaft position (cmp) sensor (on top rear of engine, near transmission)
• Engine oil pressure (eop) sensor
• Evaporative emission (evap) canister purge solenoid (on left side of engine block)
• Evaporative emission canister vent solenoid (rear of fuel tank)
• Fuel tank pressure sensor (at top left rear of fuel tank)
• Manifold absolute pressure (map) sensor (on top of engine)
• N pnk
• P red
• Pc sol valve
• Pnk
• Pnk a
• Red
• Rev
• Tan
• Tcc pwm sol lvl
• Tcc sol lvl
• Tft sensor
• Vehicle speed sensor (2wd: on right rear of transmission) (4wd: on left rear of transfer case)

5.3L, Engine Performance Wiring Diagram (4 of 5) for Isuzu Ascender S 2004

List of elements for 5.3L, Engine Performance Wiring Diagram (4 of 5) for Isuzu Ascender S 2004:

• (above accelerator pedal) accelerator pedal position sensor
• App sens 1
• App sens 2
• B10
• B4 c1
• Canister fuse 15 10a
• Cruise control system
• Cruise on
• Data
• E12
• Etc fuse 23 15a
• Exterior lights system
• G108 (lower left side of engine)
• Ground
• Hot at all times
• Hot in run & start
• Iat
• Ign 1 volt
• Intake air temperature (in intake air duct)
• Low ref
• Maf
• Mass airflow sensor/
• Pnk
• R/a input
• Rear fuse block (below left rear seat)
• Red
• Ref low
• S/c input
• St/lp fuse 12 25a
• Stop- lamp switch (w/ eap: top of brake pedal bracket) (w/o eap: on brake pedal support)
• Stp lp in
• Tac cntrl
• Tac ctrl
• Tan
• Throttle actuator control module (on left rear of engine compartment)
• Throttle body
• Tp sens 1
• Tp sens 2
• Under- hood fuse block (on left side of engine compartment)
• Underhood fuse block (on left side of engine compartment)
• Veh stop fuse 34 15a

5.3L, Engine Performance Wiring Diagram (5 of 5) for Isuzu Ascender S 2004

List of elements for 5.3L, Engine Performance Wiring Diagram (5 of 5) for Isuzu Ascender S 2004:

• (lwr left side of eng) g109
• (lwr left side of engine) g109
• 1-2 ss ctrl
• 2-3 ss ctrl
• 4wd low sig
• A12
• Air conditioning system
• Anti-lock brakes system
• Clu rly ctrl
• Cool fan spd
• 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 (top left side of engine)
• 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 (pcm) (on left front of engine compartment)
• 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 (on left side of engine compartment)
• Vss high sig
• Vss low sig
• Vss out