ENGINE PERFORMANCE – Cadillac STS V 2009 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

3.6L VIN V

3.6L VIN V, Engine Performance Wiring Diagram (1 of 5) for Cadillac STS V 2009

List of elements for 3.6L VIN V, Engine Performance Wiring Diagram (1 of 5) for Cadillac STS V 2009:

• (1, 3 & 5: top right side of engine) fuel injectors
• (18 cm from ignition coil 1 connector)
• (2, 4 & 6: top left side of engine)
• (36 cm from ignition coil module 2 connector)
• (near right front of engine block) g109
• (rear of left cylinder head) high pressure fuel pump
• (right rear side of engine block, near starter) g112
• 5 volt ref 1
• 5 volt ref 2
• 5 volt ref 3
• After boil coolant sply volt
• Anti-lock brakes system
• 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 bank 1 sig
• Cmp sens intake bank 1 sig
• Cmp sens intake bank 2 sig
• 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
• 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
• 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
• Vacuum pump rly ctrl
• Vehicle spd sig

3.6L VIN V, Engine Performance Wiring Diagram (2 of 5) for Cadillac STS V 2009

List of elements for 3.6L VIN V, Engine Performance Wiring Diagram (2 of 5) for Cadillac STS V 2009:

• (bank 1 sens 1) ho2s lo sig
• (bank 1 sens 1) ho2s low ref
• (bank 2 sens 1)
• (bank 2 sens 1) ho2s ref volt
• (bank 2 sens 1) low ref
• (in engine harness, 27 cm from evap canister purge solenoid valve connector) j101
• (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
• (top left front of engine) camshaft position (cmp) actuator solenoid valve exhaust bank 2
• (top left front of engine) camshaft position (cmp) actuator solenoid valve intake bank 2
• (top right front of engine) camshaft position (cmp) actuator solenoid valve exhaust bank 1
• (top right front of engine) camshaft position (cmp) actuator solenoid valve intake bank 1
• Ect sens sig
• Engine control module (ecm) (front of engine, on right valve cover)
• Engine coolant temperature (ect) sensor (in center of left cylinder head)
• Engine oil pressure (eop) sensor (on left side of engine, attached to oil filter adapter housing)
• Fuel inj 1 ctrl
• Fuel inj 4 ctrl
• Ho2s hi sig
• Ho2s htr lo ctrl
• Ic 2 ctrl
• Ic 4 ctrl
• Ic 6 ctrl
• Ign 1 volt
• 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
• X1 (bank 1 sens 1) ho2s htr lo ctrl

3.6L VIN V, Engine Performance Wiring Diagram (3 of 5) for Cadillac STS V 2009

List of elements for 3.6L VIN V, Engine Performance Wiring Diagram (3 of 5) for Cadillac STS V 2009:

• (in engine compt, on fuel rail)
• (left front side of engine block) auxiliary coolant pump
• 5 volt ref
• A/c cmprsr cltch relay
• Brake vac pump fuse 15a
• Brk vac pump relay
• Camshaft position (cmp) sensor exhaust bank 1 (top right front of engine)
• Camshaft position (cmp) sensor exhaust bank 2 (top left front of engine)
• Camshaft position (cmp) sensor intake bank 1 (top front of engine)
• Camshaft position (cmp) sensor intake bank 2 (top front of engine)
• Ckp sig
• Cmp sig
• Crankshaft position sensor (lower right rear of engine)
• Ecm 1 fuse 15a
• Ecm/tcm batt fuse 10a
• Even coils fuse 15a
• Fan s/p relay
• Fuel cool fuse 10a
• Fuel cool relay
• Fuel rail pressure (frp) sensor
• G100 (on rear side of right cylinder head)
• Hi fan spd relay
• Hot at all times
• J124
• J160
• Lo fan spd relay
• Low ref
• Odd coils fuse 15a
• Pnk
• Post o2 snsr fuse 15a
• Pre o2 snsr fuse 15a
• Pwr/trn relay
• Sens 1 exhaust
• Sens 2 exhaust
• Sens rtn
• Tan
• Throttle body assembly (top front of engine)
• 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 V 2009

List of elements for 3.6L VIN V, Engine Performance Wiring Diagram (4 of 5) for Cadillac STS V 2009:

• (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 level sensor (top left of fuel tank)
• Tan

3.6L VIN V, Engine Performance Wiring Diagram (5 of 5) for Cadillac STS V 2009

List of elements for 3.6L VIN V, Engine Performance Wiring Diagram (5 of 5) for Cadillac STS V 2009:

• (in air intake duct) mass air flow (maf)/intake air temperature (iat) sensor
• (in engine harness, 52 cm from ho2s bank 1 sensor 2 connector)
• (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 rly ctrl
• A/c refrigerant pressure sensor
• Accelerator pedal position (app) sensor (attached to top of accelerator pedal)
• Air conditioning system
• App sens 1 sig
• 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 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 rly 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 V 2009

List of elements for 4.4L VIN D, Engine Performance Wiring Diagram (1 of 6) for Cadillac STS V 2009:

• (in fuel tank jumper harness, 28 cm from fuel tank pressure sensor connector) j406
• (in fuel tank) fuel pump & sender assembly
• (top left of fuel tank) secondary fuel level sensor
• 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 V 2009

List of elements for 4.4L VIN D, Engine Performance Wiring Diagram (2 of 6) for Cadillac STS V 2009:

• (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)
• Automatic transmission
• 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 valve (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
• Left rear fuse block (under left side of rear seat)
• Logic
• Malfunction indicator lamp
• Nca
• Pnk
• Tan

4.4L VIN D, Engine Performance Wiring Diagram (3 of 6) for Cadillac STS V 2009

List of elements for 4.4L VIN D, Engine Performance Wiring Diagram (3 of 6) for Cadillac STS V 2009:

• (in front center of engine,at number 2 injector) supercharger bypass valve solenoid
• (in left side of rear compt, under rear shelf) rear object sensor control module
• 5 volt ref 1
• A/c cmprsr cltch relay
• 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
• Fan s/p relay
• Fuel pump relay ctrl
• Fuel tank press sens sig
• Hi fan spd relay
• 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)
• J104
• Lo fan spd relay
• 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 V 2009

List of elements for 4.4L VIN D, Engine Performance Wiring Diagram (4 of 6) for Cadillac STS V 2009:

• (in ignition coil harness) j137
• (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
• (in ignition coil harness, 36 cm from ignition module 2 connector) j131
• (on rear side of right cylinder head) g107
• (on top right side of engine) supercharger air inlet pressure 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 coils (1, 3, 5 & 7: top left side of engine) (2, 4, 6 & 8: top right side of engine)
• J127
• J133
• 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 V 2009

List of elements for 4.4L VIN D, Engine Performance Wiring Diagram (5 of 6) for Cadillac STS V 2009:

• 5 volt ref
• Camshaft position (cmp) actuator solenoid valve exhaust bank 1 (top right front of engine)
• Camshaft position (cmp) actuator solenoid valve intake bank 1 (top right front of engine)
• Camshaft position (cmp) actuator solenoid valve intake bank 2 (top left front of engine)
• Camshaft position (cmp) sensor exhaust bank 1 (top right front of engine)
• Camshaft position (cmp) sensor exhaust bank 2 (top left front of engine)
• Camshaft position (cmp) sensor intake bank 1 (top right front of engine)
• Camshaft position (cmp) sensor intake bank 2 (top left front of engine)
• Ckp sens sig
• Cmp sig
• Crankshaft position (ckp) sensor (top center of engine)
• Low ref
• Pnk
• Tan

4.4L VIN D, Engine Performance Wiring Diagram (6 of 6) for Cadillac STS V 2009

List of elements for 4.4L VIN D, Engine Performance Wiring Diagram (6 of 6) for Cadillac STS V 2009:

• 5 volt ref 1
• 5 volt ref 2
• Camshaft position (cmp) actuator solenoid valve exhaust bank 2 (left front of engine)
• 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
• J109
• J152
• Knock sensor (ks) 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 (in air intake duct)
• Nca
• Oil press sens sig
• Oil temp sens low ref
• Oil temp sens sig
• Pnk
• Sol intake bank 1 ctrl
• Sol intake bank 2 ctrl
• Tac mtr ctrl 1
• Tac mtr ctrl 2
• Tan
• Tan d
• Tan e
• Throttle body assembly (top front of engine)
• 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 V 2009

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (1 of 6) for Cadillac STS V 2009:

• (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 V 2009

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (2 of 6) for Cadillac STS V 2009:

• (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
• (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
• (top left of fuel tank) secondary fuel level sensor
• Accelerator pedal position (app) sensor (attached to top of accelerator pedal)
• Camshaft position (cmp) actuator solenoid valve exhaust bank 1 (right front of engine)
• Camshaft position (cmp) actuator solenoid valve exhaust bank 2 (left front of engine)
• Camshaft position (cmp) actuator solenoid vlave intake bank 1 (top right front of engine)
• Camshaft position (cmp) actuator solenoid vlave intake bank 2 (top left front of engine)
• J101 (in engine harness, 15 cm from fuel injector 5 connector)
• 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 V 2009

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (3 of 6) for Cadillac STS V 2009:

• (in fuel tank) fuel pump & sender assembly
• (in rear compt, to rear of right rear shock tower)
• 5 volt ref 1
• A/c cmprsr cltch relay
• 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
• Fan s/p relay
• Ftp sensor sig
• Fuel level sensor sig
• Fuel pump relay ctrl
• G401
• Hi fan spd relay
• High speed relay ctrl
• Hot at all times
• Hot w/ run crnk relay energized
• J104
• J109
• Left fuel tank sensor
• Lo fan spd relay
• 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 V 2009

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (4 of 6) for Cadillac STS V 2009:

• (in engine poa harness, 18 cm from ignition coil 1 connector)
• (in ignition coil harness) j137
• (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
• (in ignition coil harness, 36 cm from ignition coil module 2 connector) j131
• (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 (2, 4, 6 & 8: top right side of engine) (1, 3, 5 & 7: top left side of engine)
• Inside rearview mirror
• J127
• J133
• 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 V 2009

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (5 of 6) for Cadillac STS V 2009:

• 5 volt ref
• A pnk
• B tan
• Camshaft position (cmp) sensor exhaust bank 1 (top right front of engine)
• Camshaft position (cmp) sensor exhaust bank 2 (top left front of engine)
• Camshaft position (cmp) sensor intake bank 1 (top right front of engine)
• Camshaft position (cmp) sensor intake bank 2 (top left front of engine)
• 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 V 2009

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (6 of 6) for Cadillac STS V 2009:

• 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 (top center of engine)
• 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)
• Nca
• Oil press sens sig
• Pnk
• Tac motor ctrl 1
• Tac motor ctrl 2
• Tan
• Tan d
• Tan e
• Throttle body assembly (top front of engine)
• Tp sensor 1 sig
• Tp sensor 2 sig
• Volt ref