ENGINE PERFORMANCE – Cadillac STS 2008 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

3.6L VIN V

3.6L VIN V, Engine Performance Wiring Diagram (1 of 5) for Cadillac STS 2008

List of elements for 3.6L VIN V, Engine Performance Wiring Diagram (1 of 5) for Cadillac STS 2008:

• (2, 4 & 6: top left side of engine) (1, 3 & 5: top right side of engine) fuel injectors
• (36 cm from ignition coil module 2 connector)
• (near right front of engine block) g109
• (right rear side of engine block, near starter) g112
• 5 volt ref 1
• 5 volt ref 2
• 5 volt ref 3
• Afterboil coolant pump sply volt
• Camshaft phaser exhaust sol 1
• Ckp sens 1 sig
• Cmp actr sol exhaust bank 2
• Cmp actr sol intake bank 1
• Cmp exhaust sens 1
• Cmp exhaust sens 2
• Cmp intake sens intake bank 1 sig
• Cmp intake sens intake bank 2 sig
• Cmp sens intake bank 1 sig
• Cooling fans system
• Engine control module (ecm) (front of engine, on right valve cover)
• Evap cnstr purge sol ctrl
• Frp sens sig
• Fuel inj 2 ctrl
• Fuel inj 3 ctrl
• Fuel inj 5 ctrl
• Fuel inj 6 ctrl
• Generator field duty cycle sig
• Generator turn on sig
• High pressure fuel pump
• Ho2s hi sig (bank 1 sens 1)
• Ho2s htr lo ctrl (bank 1 sens 1)
• Ho2s htr lo ctrl (bank 2 sens 1)
• Ho2s lo sig (bank 2 sens 1)
• Ic 1 ctrl
• Ic 3 ctrl
• Ic 5 ctrl
• Ignition coil 1 (on top front of left valve cover)
• Ignition coil 2 (on top front of right valve cover)
• Ignition coil 3 (on top center of left valve cover)
• Ignition coil 4 (on top center of right valve cover)
• Ignition coil 5 (on top rear of left valve cover)
• Ignition coil 6 (on top rear of right valve cover)
• J127 (18 cm from ignition coil 1 connector)
• J131
• Low ref
• Low ref hi press fuel pump actr sol ctrl
• Nca
• Plug spark
• Sound systems
• Spark plug
• Starting/charging system
• Tac mtr ctrl 1
• Tac mtr ctrl 2
• Tan
• Vehicle spd sig

3.6L VIN V, Engine Performance Wiring Diagram (2 of 5) for Cadillac STS 2008

List of elements for 3.6L VIN V, Engine Performance Wiring Diagram (2 of 5) for Cadillac STS 2008:

• (bank 1 sens 1) ho2s low ref
• (bank 2 sens 1) ho2s ref volt
• (on front of left cylinder head, lower center position) camshaft position (cmp) actuator solenoid exhaust bank 2
• (on front of left cylinder head, upper center position) camshaft position (cmp) actuator solenoid intake bank 2
• (on front of right cylinder head, lower center position) camshaft position (cmp) actuator solenoid exhaust bank 1
• (on front of right cylinder head, upper center position) camshaft position (cmp) actuator solenoid intake bank 1
• (on left exhaust pipe, before catalytic converter) heated oxygen sensor (ho2s) bank 2 sensor 1
• (on right exhaust pipe, before catalytic converter) heated oxygen sensor (ho2s) bank 1 sensor 1
• (on right side of engine, near valve cover) evaporative emissions (evap) canister purge solenoid valve
• Ect sens sig
• Engine control module (ecm) (front of engine, on right valve cover)
• Engine coolant temperature (ect) sensor (in bottom of engine oil pan)
• Engine oil pressure (eop) sensor (on left side of engine, attached to oil filter adapter housing)
• Fuel inj 1 ctrl
• Fuel inj 4 ctrl
• Ic 2 ctrl
• Ic 4 ctrl
• Ic 6 ctrl
• Ign 1 volt
• J101
• Knock sens 1 sig
• Knock sens 2 sig
• Knock sensor (ks) bank 1 (on right side of engine)
• Knock sensor (ks) bank 2 (on left side of engine)
• Low ref
• Nca
• Oil press sens sig
• Tan
• Tp sens 1 sig
• Tp sens 2 sig

3.6L VIN V, Engine Performance Wiring Diagram (3 of 5) for Cadillac STS 2008

List of elements for 3.6L VIN V, Engine Performance Wiring Diagram (3 of 5) for Cadillac STS 2008:

• (in engine poa harness, 32 cm from throttle body assembly connector) j124
• 5 volt ref
• Camshaft position (cmp) sensor exhaust bank 1 (on front of right cylinder head, on right side)
• Camshaft position (cmp) sensor exhaust bank 2 (on front of left cylinder head, on left side)
• Camshaft position (cmp) sensor intake bank 1 (on front of right cylinder head, on left side)
• Camshaft position (cmp) sensor intake bank 2 (on front of left cylinder head, on right side)
• Ckp sig
• Cmp sig
• Crankshaft position (ckp) sensor (on left side of engine)
• Ecm 1 fuse 15a
• Ecm/tcm batt fuse 10a
• Even coils fuse 15a
• Fuel rail pressure (fpr) sensor
• Hot at all times
• J160
• Low ref
• Odd coils fuse 15a
• Post o2 snsr fuse 15a
• Pre o2 snsr fuse 15a
• Pwr/trn relay
• Sens 1 exhaust
• Sens 2 exhaust
• Sens rtn
• Tan
• Throttle body
• Tps1
• Tps2
• Underhood fuse block (right front side of engine compt)

3.6L VIN V, Engine Performance Wiring Diagram (4 of 5) for Cadillac STS 2008

List of elements for 3.6L VIN V, Engine Performance Wiring Diagram (4 of 5) for Cadillac STS 2008:

• (in fuel tank jumper harness, 28 cm from fuel tank pressure sensor connector)
• Cnstr vent fuse 10a
• Evaporative emission (evap) canister vent solenoid valve (under rear of vehicle, above rear differential)
• Fuel pump
• Fuel pump & sender assembly (in fuel tank)
• Fuel pump fuse 20a
• Fuel pump relay
• Fuel tank pressure (ftp) sensor (attached to evap canister vent solenoid, at rear of fuel tank)
• G401 (in rear compt, to rear of right rear shock tower)
• Hot at all times
• J/c
• J406
• Left fuel tank sensor
• R11
• R12
• R13
• R15
• Right rear fuse block (under right side of rear seat)
• Secondary fuel sender assembly (in top left side of fuel tank)
• Tan

3.6L VIN V, Engine Performance Wiring Diagram (5 of 5) for Cadillac STS 2008

List of elements for 3.6L VIN V, Engine Performance Wiring Diagram (5 of 5) for Cadillac STS 2008:

• (in air intake duct, near throttle body) mass air flow (maf)/intake air temperature (iat) sensor
• (on left exhaust pipe, after catalytic converter) heated oxygen sensor (ho2s) bank 2 sensor 2
• (on rear side of right cylinder head) g100
• (on right exhaust pipe, after catalytic converter) heated oxygen sensor (ho2s) bank 1 sensor 2
• 5 volt ref 1
• 5 volt ref 2
• 5 volt ref 3
• A/c compressor clutch rly ctrl hi spd cooling fan spd ctrl
• A/c refrigerant pressure sensor
• Accelerator pedal position (app) sensor (attached to top of accelerator pedal)
• Air conditioning system
• App sens 1 sig 1
• App sens 2 sig
• Batt positive volt
• Computer data lines system
• Cooling fans system
• Ecm/tcm ign fuse 15a
• Ecm/tcm serial data wake up hi spd gmlan serial data bus (+)
• Engine control module (ecm) (front of engine, on right valve cover)
• Evap canister vent sol ctrl ho2s htr lo ctrl (bank 2 sens 2) mil ctrl
• Exterior lights system
• Fuel gauge sens sig
• Fuel lvl sens sig
• Fuel pump rly ctrl
• Fuel tank press sens sig
• G100 (on rear side of right cylinder head)
• Gmlan serial data bus (-)
• Gnd
• Ho2s hi sig (bank 1 sens 2) a/c refrig press sens sig
• Ho2s hi sig (bank 2 sens 2)
• Ho2s htr lo sig (bank 2 sens 2)
• Hot w/ run crnk relay energized
• Iat sens sig
• Ign
• Ign 1 volt
• Ign 1 volt ho2s htr lo ctrl (bank 1 sens 2)
• Ign lk cyl ctrl actr sig
• Instrument panel cluster (ipc)
• J104
• J109
• Lo spd cooling fan spd ctrl
• Lo spd gmlan serial data
• Logic
• Low ref
• Low ref ho2s htr lo sig (bank 1 sens 2)
• Maf sens sig
• Main rly ctrl
• Malfunction ind
• Nca
• Pnk
• Run/ crank ign 1 volt
• Sens sig
• Starter rly coil ctrl
• Starting/charging system
• Stop lamp sw sig
• Tan
• Tan c
• Transmissions system
• Underhood fuse block (right front side of engine compt)

4.4L VIN D

4.4L VIN D, Engine Performance Wiring Diagram (1 of 6) for Cadillac STS 2008

List of elements for 4.4L VIN D, Engine Performance Wiring Diagram (1 of 6) for Cadillac STS 2008:

• (in fuel tank jumper harness, 28 cm from fuel tank pressure sensor connector) j406
• (in fuel tank) fuel pump & sender assembly
• (in top left side of fuel tank) secondary fuel sender assembly
• 5 volt ref
• 5 volt ref 1
• A/c refrigerant press sig
• A/c refrigerant pressure sensor (near left front strut tower, on a/c refrigerant line)
• Baro sens low ref
• Baro sensor sig
• Barometric pressure (baro) sensor (top right side engine)
• Cnstr vent fuse 10a
• Computer data lines system
• Coolant pump rly ctrl
• Cooling fans system
• Ect sensor sig
• Engine control module (ecm) (on left front frame rail, below left headlamp assembly)
• Engine coolant temperature (ect) sensor (rear of right cylinder head)
• Evap cnstr purge sol ctrl
• Fuel pump
• Fuel pump fuse 20a
• Fuel pump relay
• G100 (on rear side of right cylinder head)
• G401 (in rear compt, to rear of right rear shock tower)
• Generator field duty cycle sig
• Generator turn on sig
• Ground
• Hi spd gmlan bus +
• Hi spd gmlan serial data bus -
• Ho2s hi sig (bank 2 sens 1)
• Ho2s hi sig (bank 2 sens 2)
• Ho2s lo sig (bank 2 sens 1)
• Ho2s lo sig (bank 2 sens 2)
• Hot at all times
• Htr lo ctrl (bank 2 sens 1)
• Iat 2 low ref
• Iat 2 sig
• Intake air temperature (iat) sensor 2 (top right front of engine, under intake air tube)
• J/c
• J152
• Left fuel tank sensor
• Lo spd cooling fan rly ctrl ho2s htr lo ctrl (bank 2 sens 2)
• Low ref
• Manifold absolute pressure (map) sensor (top right side of engine, near baro sensor)
• Map sensor sig
• Oil level sw sig
• Park/neutral sig
• Pnk
• R11
• R12
• R13
• R15
• Right rear fuse block (under right side of rear seat)
• Starting/ charging system
• Starting/charging system
• Tan
• Transmissions system
• Vacuum bypass vlv ctrl

4.4L VIN D, Engine Performance Wiring Diagram (2 of 6) for Cadillac STS 2008

List of elements for 4.4L VIN D, Engine Performance Wiring Diagram (2 of 6) for Cadillac STS 2008:

• (at bottom of radiator, between fans) charge air cooler (cac) coolant pump
• (attached to evap canister vent solenoid, at rear of fuel tank) fuel tank pressure (ftp) sensor
• (in engine harness, 19 cm from ho2s bank 1 sensor 1 connector) j113
• (on left exhaust pipe, before catalytic converter) heated oxygen sensor (ho2s) bank 2 sensor 1
• (on right exhaust pipe, before catalytic converter) heated oxygen sensor (ho2s) bank 1 sensor 1
• Accelerator pedal position (app) sensor (attached to top of accelerator pedal)
• Computer data lines system
• Data
• Evaporative emissions (evap) canister purge solenoid valve (on rear of engine, near throttle body)
• Evaporative emissions (evap) canister vent solenoid (under rear of vehicle, above rear differential)
• G100 (on rear side of right cylinder head)
• Heated oxygen sensor (ho2s) bank 1 sensor 2 (on right exhaust pipe, after catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 2 (on left exhaust pipe, after catalytic converter)
• Hot at all times
• Ign
• Inclr pump fuse 10a
• Inclr pump relay
• Instrument panel cluster (ipc)
• Instrument panel module (ipm) (right side of dash, behind glove box)
• J101
• J104
• Left rear fuse block (under left side of rear seat)
• Logic
• Malfunction indicator lamp
• Nca
• Pnk
• Tan
• Transmission control module (tcm) (right front corner of engine compt, on underhood fuse block)

4.4L VIN D, Engine Performance Wiring Diagram (3 of 6) for Cadillac STS 2008

List of elements for 4.4L VIN D, Engine Performance Wiring Diagram (3 of 6) for Cadillac STS 2008:

• (in left side of rear compt, under rear shelf) rear object sensor control module
• (left front of engine, at injector 2) vacuum bypass valve solenoid
• 5 volt ref 1
• A/c compressor
• Air conditioning system
• App sensor 1 sig
• App sensor 2 sig
• Battery positive volt
• Clutch rly ctrl
• Cooling fans system
• Data wake up ecm/tcm serial
• Ecm 1 fuse 15a
• Ecm/tcm batt fuse 10a
• Ecm/tcm ign fuse 15a
• Engine control module (ecm) (on left front frame rail, below left headlamp assembly)
• Evap canister vent sol ctrl
• Exterior lights system
• Fuel pump relay ctrl
• Fuel tank press sens sig
• Hi spd cooling fan rly ctrl
• Hot at all times
• Hot w/ run crnk relay energized
• Inlet air press sens sig
• Inside rearview mirror (isrvm)
• Low ref
• Mil ctrl
• Pnk
• Post o2 snsr fuse 15a
• Powertrain rly ctrl
• Pre o2 snsr fuse 15a
• Pwr/trn relay
• Radio
• Run/crank ign 1 volt
• Secondary fuel lvl sens sig
• Starter rly coil ctrl
• Starting/ charging system
• Stop lamp sw sig
• Tan
• To even coils fuse (diagram 4 of 6)
• Transmissions system
• Underhood fuse block (right front side of engine compt)
• Vehicle speed sig
• W/ infotainment system 012, 014 & 015
• W/ intelligent high beam control

4.4L VIN D, Engine Performance Wiring Diagram (4 of 6) for Cadillac STS 2008

List of elements for 4.4L VIN D, Engine Performance Wiring Diagram (4 of 6) for Cadillac STS 2008:

• (in ignition coil harness, 30 cm from ignition coil module 1 connector)
• (in ignition coil harness, 30 cm from ignition coil module 7 connector) j146
• (in ignition coil harness, 31 cm from ignition coil module 8 connector) j135
• (on rear side of right cylinder head) g107
• (on top right side of engine) super charger inlet air pressure (sciap) sensor
• Even coils fuse 15a
• From a pwr/trn relay (diagram 3 of 6)
• Fuel injectors (1, 3, 5 & 7: top right side of engine) (2, 4, 6 & 8: top left side of engine)
• G107 (on rear side of right cylinder head)
• Ignition coil/module
• J127
• J131
• J133
• J137
• J142
• J144
• Nca
• Odd coils fuse 15a
• Pnk
• Pnk a
• Pnk b
• Spark plug
• Tan
• Tan c
• Underhood fuse block (right front side of engine compt)

4.4L VIN D, Engine Performance Wiring Diagram (5 of 6) for Cadillac STS 2008

List of elements for 4.4L VIN D, Engine Performance Wiring Diagram (5 of 6) for Cadillac STS 2008:

• 5 volt ref
• Camshaft position (cmp) actuator solenoid exhaust bank 1 (on front of right cylinder head, lower center position)
• Camshaft position (cmp) actuator solenoid intake bank 1 (on front of right cylinder head, upper center position)
• Camshaft position (cmp) actuator solenoid intake bank 2 (on front of left cylinder head, upper center position)
• Camshaft position (cmp) sensor exhaust bank 1 (on front of right cylinder head, on right side)
• Camshaft position (cmp) sensor exhaust bank 2 (on front of left cylinder head, on left side)
• Camshaft position (cmp) sensor intake bank 1 (on front of right cylinder head, on left side)
• Camshaft position (cmp) sensor intake bank 2 (on front of left cylinder head, on right side)
• Ckp sens sig
• Cmp sig
• Crankshaft position (ckp) sensor (center of engine block, under intake manifold)
• Low ref
• Pnk
• Tan

4.4L VIN D, Engine Performance Wiring Diagram (6 of 6) for Cadillac STS 2008

List of elements for 4.4L VIN D, Engine Performance Wiring Diagram (6 of 6) for Cadillac STS 2008:

• 5 volt ref 1
• 5 volt ref 2
• Camshaft position (cmp) actuator solenoid exhaust bank 2 (on front of left cylinder head, lower center position)
• Ckp sensor sig
• Engine control module (ecm) (on left front frame rail, below left headlamp assembly)
• Engine oil level/ temperature sensor (bottom center of engine oil pan)
• Engine oil pressure (eop) sensor (on left side of engine)
• Exhaust bank 1 ctrl
• Exhaust bank 1 sig
• Exhaust bank 2 ctrl
• Exhaust bank 2 sig
• 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
• G100 (on rear side of right cylinder head)
• Gnd
• Ground
• Hi sig (bank 1 sens 1)
• Hi sig (bank 1 sens 2)
• Ho2s htr low ctrl
• Iat sensor sig
• Ic 1 ctrl
• Ic 2 ctrl
• Ic 3 ctrl
• Ic 4 ctrl
• Ic 5 ctrl
• Ic 6 ctrl
• Ic 7 ctrl
• Ic 8 ctrl
• Ign 1 volt
• Intake bank 1 sig
• Intake bank 2 sig
• J151
• J152
• Knock sensor (ks) bank 1 (on right side of engine, under intake manifold)
• Knock sensor (ks) bank 2 (on left side of engine, under intake manifold)
• Ks 1 sig
• Ks 2 sig
• Lo sig (bank 1 sens 1)
• Lo sig (bank 1 sens 2)
• Low ref
• Low ref inlet air press sens rtn
• Maf sensor sig
• Maf sig
• Mass air flow (maf)/ intake air temperature (iat) sensor (left side of engine compt, in air intake tube)
• Nca
• Oil press sens sig
• Oil temp sens low ref
• Pnk
• Sol intake bank 1 ctrl
• Sol intake bank 2 ctrl
• Tac mtr ctrl 1
• Tac mtr ctrl 2
• Tan
• Tan d
• Tan e
• Tcc release sw sig
• Throttle body
• Tp sensor 1 sig
• Tp sensor 2 sig

4.6L VIN A

4.6L VIN A, Engine Performance Wiring Diagram (1 of 6) for Cadillac STS 2008

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (1 of 6) for Cadillac STS 2008:

• (on left front frame rail, below left headlamp assembly) engine control module (ecm)
• 5 volt ref 1
• A/c refrigerant press sens sig
• A/c refrigerant pressure sensor (near left front strut tower, on a/c refrigerant line)
• Cnstr vent fuse 10a
• Computer data lines system
• Cooling fans system
• Ect sensor sig
• Engine coolant temperature (ect) sensor (in rear side of right cylinder head)
• Evap canister purge sol ctrl
• Evaporative emissions (evap) canister purge solenoid valve (on rear of engine, near throttle body)
• Evaporative emissions (evap) canister vent solenoid (under rear of vehicle, above rear differential)
• Fuel pump fuse 20a
• Fuel pump relay
• G100 (on rear side of right cylinder head)
• G401 (in rear compt, to rear of right rear shock tower)
• Generator field duty cycle sig
• Generator turn on sig
• Ground
• Hi spd gmlan serial data bus +
• Hi spd gmlan serial data bus -
• Ho2s hi sig (bank 2 sens 1)
• Ho2s hi sig (bank 2 sens 2)
• Ho2s htr lo ctrl (bank 2 sens 1)
• Ho2s lo sig (bank 2 sens 1)
• Ho2s lo sig (bank 2 sens 2)
• Hot at all times
• Ign
• Instrument panel cluster (ipc)
• J/c
• J152
• Lo spd cooling fan relay ctrl ho2s htr lo ctrl (bank 2 sens 2)
• Lo spd gmlan serial data
• Logic
• Low ref
• Malfunction ind
• Manifold absolute pressure (map) sensor (front center of engine, in back of throttle body)
• Map sensor sig
• Park/neutral sig
• R11
• R12
• R13
• R15
• Right rear fuse block (under right side of rear seat)
• Starting/ charging system
• Starting/charging system
• Tan
• Transmissions system

4.6L VIN A, Engine Performance Wiring Diagram (2 of 6) for Cadillac STS 2008

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (2 of 6) for Cadillac STS 2008:

• (attached to evap canister vent solenoid, at rear of fuel tank) fuel tank pressure (ftp) sensor
• (in fuel tank jumper harness, 28 cm from fuel tank pressure sensor connector) j406
• (in top left side of fuel tank) secondary fuel sender assembly
• (on left exhaust pipe, after catalytic converter) heated oxygen sensor (ho2s) bank 2 sensor 2
• (on left exhaust pipe, before catalytic converter) heated oxygen sensor (ho2s) bank 2 sensor 1
• (on right exhaust pipe, after catalytic converter) heated oxygen sensor (ho2s) bank 1 sensor 2
• (on right exhaust pipe, before catalytic converter) heated oxygen sensor (ho2s) bank 1 sensor 1
• Accelerator pedal position (app) sensor (attached to top of accelerator pedal)
• Camshaft position (cmp) actuator solenoid exhaust bank 1 (on front of right cylinder head, lower center position)
• Camshaft position (cmp) actuator solenoid exhaust bank 2 (on front of left cylinder head, lower center position)
• Camshaft position (cmp) actuator solenoid intake bank 1 (on front of right cylinder head, upper center position)
• Camshaft position (cmp) actuator solenoid intake bank 2 (on front of left cylinder head, upper center position)
• J101 (in engine harness, 15 cm from fuel injector 5 connector)
• J104 (in engine harness, 34 cm from x102)
• Knock sensor (ks) bank 2 (on left side of engine, under intake manifold)
• Nca
• Tan

4.6L VIN A, Engine Performance Wiring Diagram (3 of 6) for Cadillac STS 2008

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (3 of 6) for Cadillac STS 2008:

• (in fuel tank) fuel pump & sender assembly
• (in rear compt, to rear of right rear shock tower)
• 5 volt ref 1
• A/c compressor ctrl
• Air conditioning system
• App sensor 1 sig
• App sensor 2 sig
• Battery positive volt
• Computer data lines system
• Cooling fans system
• Ecm 1 fuse 15a
• Ecm/tcm batt fuse 10a
• Ecm/tcm ign fuse 15a
• Ecm/tcm serial data
• Engine control module (ecm) (on left front frame rail, below left headlamp assembly)
• Evap canister ctrl
• Exterior lights system
• Ftp sensor sig
• Fuel level sensor sig
• Fuel pump relay ctrl
• G401
• High speed relay ctrl
• Hot at all times
• Hot w/ run crnk relay energized
• J109
• Left fuel tank sensor
• Low ref
• Mil ctrl
• Pnk
• Post o2 snsr fuse 15a
• Powertrain relay ctrl
• Pre o2 snsr fuse 15a
• Pwr/trn relay
• Run/crank ign 1 volt
• Secondary sensor sig
• Starter rly coil ctrl
• Starting/charging system
• Stop lamp switch sig
• Tan
• To even coils fuse (diagram 4 of 6)
• Transmissions system
• Underhood fuse block (right front side of engine compt)
• Vehicle speed sig

4.6L VIN A, Engine Performance Wiring Diagram (4 of 6) for Cadillac STS 2008

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (4 of 6) for Cadillac STS 2008:

• (in ignition coil harness, 30 cm from ignition coil module 1 connector)
• (in ignition coil harness, 30 cm from ignition coil module 7 connector) j146
• (in ignition coil harness, 31 cm from ignition coil module 8 connector) j135
• (on rear side of right cylinder head) g107
• B tan
• Even coils fuse 15a
• From a pwr/trn relay (diagram 3 of 6)
• Fuel injectors (1, 3, 5 & 7: top right side of engine) (2, 4, 6 & 8: top left side of engine)
• Ignition coil/module (2, 4, 6 & 8: top right side of engine) (1, 3, 5 & 7: top left side of engine)
• Inside rearview mirror
• J127
• J131
• J133
• J137
• J142
• Nca
• Odd coils fuse 15a
• Plug spark
• Pnk
• Pnk a
• Pnk b
• Radio
• Rear object sensor control module (in left side of rear compt, under rear shelf)
• Spark plug
• Tan
• Tan c
• Underhood fuse block (right front side of engine compt)
• W/ infotainment system 012, 014 & 015
• W/ intelligent high beam control

4.6L VIN A, Engine Performance Wiring Diagram (5 of 6) for Cadillac STS 2008

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (5 of 6) for Cadillac STS 2008:

• 5 volt ref
• A pnk
• B tan
• Camshaft position (cmp) sensor exhaust bank 1 (on front of right cylinder head, on right side)
• Camshaft position (cmp) sensor exhaust bank 2 (on front of left cylinder head, on left side)
• Camshaft position (cmp) sensor intake bank 1 (on front of right cylinder head, on left side)
• Camshaft position (cmp) sensor intake bank 2 (on front of left cylinder head, on right side)
• Cmp sig
• Engine oil pressure (eop) sensor (on left side of engine)
• Low ref
• Pnk
• Tan

4.6L VIN A, Engine Performance Wiring Diagram (6 of 6) for Cadillac STS 2008

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (6 of 6) for Cadillac STS 2008:

• 5 volt ref 1
• 5 volt ref 2
• Ckp sens sig
• Ckp sensor sig
• Cmp actr sol exhaust bank 1 ctrl
• Cmp actr sol exhaust bank 2 ctrl
• Cmp actr sol intake bank 1 ctrl
• Cmp actr sol intake bank 2 ctrl
• Cmp sens exhaust bank 1 sig
• Cmp sens exhaust bank 2 sig
• Cmp sens intake bank 1 sig
• Cmp sens intake bank 2 sig
• Crankshaft position (ckp) sensor (center of engine block, under intake manifold)
• Engine control module (ecm) (on left front frame rail, below left headlamp assembly)
• 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
• G100 (on rear side of right cylinder head)
• Gnd
• Ground
• Ho2s high sig (bank 1 sensor 1)
• Ho2s high sig (bank 1 sensor 2)
• Ho2s htr low ctrl (bank 1 sens 1)
• Ho2s htr low ctrl (bank 2 sens 1)
• Ho2s low sig (bank 1 sensor 1)
• Ho2s low sig (bank 1 sensor 2)
• Iat sensor sig
• Ic 1 ctrl
• Ic 2 ctrl
• Ic 3 ctrl
• Ic 4 ctrl
• Ic 5 ctrl
• Ic 6 ctrl
• Ic 7 ctrl
• Ic 8 ctrl
• Ign 1 volt
• J152
• Knock sensor (ks) bank 1 (on right side of engine, under intake manifold)
• Knock sensor 1 sig
• Knock sensor 2 sig
• Low ref
• Maf sens sig
• Maf sensor sig
• Mass air flow (maf)/intake air temperature (iat) sensor (in air intake duct, near throttle body)
• Nca
• Oil press sens sig
• Pnk
• Tac motor ctrl 1
• Tac motor ctrl 2
• Tan
• Tan d
• Tan e
• Throttle body
• Tp sensor 1 sig
• Tp sensor 2 sig
• Volt ref