ENGINE PERFORMANCE – Cadillac STS 2005 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

3.6L VIN 7

3.6L VIN 7, Engine Performance Wiring Diagram (1 of 4) for Cadillac STS 2005

List of elements for 3.6L VIN 7, Engine Performance Wiring Diagram (1 of 4) for Cadillac STS 2005:

• (17 cm from ecm)
• (52 cm from ho2s bank 1 sensor 2)
• (bottom of engine oil pan) engine oil level/temperature sensor
• (left side of engine) engine oil pressure sensor
• (rear of intake manifold) intake manifold runner control solenoid
• +5v
• +5v ref
• Baro sig
• Charging circuit
• Ckp hi
• Ckp sens lo
• Cmp exhaust 1
• Cmp exhaust 2
• Cmp intake 1
• Cmp intake 2
• Crankshaft position sensor (left side of engine)
• Ect sig
• Engine control module (ecm) (front of engine, on right valve cover)
• Evap purge
• Fuel injectors
• G103 (top right side of engine)
• G113 (right front cylinder head)
• Gen fdc sig
• Gen to sig
• Heated oxygen sensor bank 1 sensor 1 (on right exhaust pipe)
• Heated oxygen sensor bank 1 sensor 2 (downstream of right catalytic converter)
• Heated oxygen sensor bank 2 sensor 1 (on left exhaust pipe)
• Heated oxygen sensor bank 2 sensor 2 (downstream of left catalytic converter)
• Ho2s 1,1
• Ho2s 2,1
• Ho2s pmp 1,1
• Ho2s pmp 2,1
• Ic 1 sig
• Ic 2 ctrl
• Ic 3 ctrl
• Ic 4 sig
• Ic 5 ctrl
• Ic 6 ctrl
• Imrc sig
• Imrc sol ctrl
• Inj 1 ctrl
• Inj 2 ctrl
• Inj 3 ctrl
• Inj 4 ctrl
• Inj 5 ctrl
• Inj 6 ctrl
• Knock sensor (bank 1) (right side of engine)
• Knock sensor (bank 2) (left side of engine)
• Ks 1 sig
• Ks 2 sig
• Ks low ref
• Low ref
• Nca
• Oil lev sig
• Oil pres sig
• Oil tmp sig
• Red
• S104
• S121
• S136
• S137
• Shield
• Tac mtr ctrl
• Tan
• Tan a
• Tp2 sig
• Tps +5v ref
• Tps low ref
• Tps sig 1

3.6L VIN 7, Engine Performance Wiring Diagram (2 of 4) for Cadillac STS 2005

List of elements for 3.6L VIN 7, Engine Performance Wiring Diagram (2 of 4) for Cadillac STS 2005:

• (18 cm from ign coil 1)
• (25 cm from ign coil 2)
• (27 cn from evap canister purge solenoid valve)
• (right rear side of engine block)
• Canister vent fuse 10a
• Ecm/ tcm/ ipc fuse 15a
• Ecm/tcm fuse 10a
• Even coils fuse 15a
• Fuel pump motor relay
• Fuel pump mtr fuse 15a
• G104 (right front of engine compt)
• G109 (right front of engine block)
• G112
• G401 (to rear of right rear shock tower)
• Hfv6 ecm fuse 15a
• Hot at all times
• Hot in run or start
• Ign 1 relay
• Ignition coil 1 (rear of right cyl head)
• Ignition coil 2 (front of left cyl head)
• Ignition coil 3 (center of right cyl head)
• Ignition coil 4 (center of left cyl head)
• Ignition coil 5 (front of right cyl head)
• Ignition coil 6 (rear of left cyl head)
• Maf fuse 15a
• Main relay
• Nca
• Odd coils fuse 15a
• Pnk
• Post o2 fuse 10a
• Pre o2/ cam fuse 15a
• R12
• R13
• R15
• R40
• R43
• R44
• R45
• R46
• R47
• R48
• R49
• R50
• Right rear fuse block (under right side of rear seat)
• S101
• S112
• S119
• S125
• S126
• S128
• S129
• Spark plug
• Splice pack
• Tan
• Underhood fuse block (right front side of engine compt)

3.6L VIN 7, Engine Performance Wiring Diagram (3 of 4) for Cadillac STS 2005

List of elements for 3.6L VIN 7, Engine Performance Wiring Diagram (3 of 4) for Cadillac STS 2005:

• (21 cm from throttle body) s120
• (32 cm from throttle body) s124
• (front of left cyl head) camshaft position actuator solenoid (exhaust bank 2)
• (front of left cyl head) camshaft position actuator solenoid (intake bank 2)
• (front of left cyl head) camshaft position sensor (exhaust bank 2)
• (front of left cyl head) camshaft position sensor (intake bank 2)
• (front of right cyl head) camshaft position actuator solenoid (exhaust bank 1)
• (front of right cyl head) camshaft position actuator solenoid (intake bank 1)
• (front of right cyl head) camshaft position sensor (exhaust bank 1)
• (front of right cyl head) camshaft position sensor (intake bank 1)
• +5v
• A/c refrigerant pressure sensor (near left front strut tower)
• Barometric pressure sensor (left rear corner of upper intake manifold)
• Engine coolant temperature sensor (center of left cyl head)
• Evap canister purge solenoid valve (right side of engine)
• Low ref
• Mass air flow (maf) & intake air temperature (iat) sensor (in air intake duct)
• Pnk
• Signal
• Tan
• Throttle position sensor (on throttle body)

3.6L VIN 7, Engine Performance Wiring Diagram (4 of 4) for Cadillac STS 2005

List of elements for 3.6L VIN 7, Engine Performance Wiring Diagram (4 of 4) for Cadillac STS 2005:

• (19 cm from ho2s bank 1 sensor 1)
• (28 cm from fuel tank press sensor)
• (28 cm from maf sensor)
• (36 cm from brake press sensor)
• (front center of right cyl head)
• (in fuel tank meter assembly) fuel tank pressure sensor
• (left side of rear compartment) rear object sensor control module
• +5v ref
• +5v ref a
• +5v ref c
• A/c ref pres
• A/c system
• Accelerator pedal
• App sens 2 sig
• App sens sig 1
• Battery +
• Clu rly ctrl
• Cooling fans system
• Data wake-up
• Engine control module (ecm) (front of engine, on right valve cover)
• Evap canister vent solenoid valve (above rear differential)
• Evap vent sol
• Exterior lights system
• Fan rly ctrl
• Fuel lev sens
• Fuel lev sig
• Fuel level sensor
• Fuel pump & sensor assembly
• G113
• G401 (rear of right rear shock tower)
• Gmlan bus
• Ho2s 1,2
• Ho2s 2,2
• Iat sig
• Ign 1 volt
• Inside rearview mirror
• Instrument panel cluster (ipc)
• Instrument panel module (ipm)
• Lan bus +
• Lan bus -
• Logic
• Low ref
• Maf sig
• Main rly ctrl
• Malfunction indicator lamp
• Mil ctrl
• P/n sig
• Pnk
• Position sensor (top of accel pedal)
• Radio
• Rly coil ctrl
• Rly coil supp
• Rly ctrl
• S106
• S107
• S108
• S109
• S113
• S406
• Secondary fuel level sensor
• Ser data bus
• Starting circuit
• Tan
• Tank pres sig
• Transmission control module (right front of engine compt)
• Transmission manual shift shaft switch assembly (in transmission)
• Vss sig
• Wake-up

4.6L VIN A

4.6L VIN A, Engine Performance Wiring Diagram (1 of 5) for Cadillac STS 2005

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (1 of 5) for Cadillac STS 2005:

• (19 cm from ho2s bank 1 sensor 1) s113
• (39 cm from brake press sensor)
• (left side of rear compt) rear object sensor control module
• 12v ref
• A/c comp cltch rly
• A/c press low ref
• A/c press sens sig
• A/c refrigerant pressure sensor (near left front strut tower)
• A/c system
• Accelerator pedal position (app) sensor (attached to top of accelerator pedal)
• App 5v ref
• App low ref
• Apps 1 sig
• Apps 2 sig
• Battery + vlt
• Computer data lines system
• Cooling fans system
• Data wake-up
• Ecm/ tcm fuse 10a
• Engine control module (ecm) (below left headlamp)
• Evap vent sol ctnl
• Evaporative emissions (evap) canister vent solenoid (above rear differential)
• Exterior lights system
• Fan rly ctrl
• Fuel pmp rly cntl
• G104 (right front of engine compt)
• Hi spd ser data +
• Hi spd ser data -
• Hot at all times
• Hot in run or start
• Iat sen sig
• Iat sig
• Ign
• Ign 1 vlt
• Inside rearview mirror
• Instrument panel cluster (ipc)
• Instrument panel module (ipm)
• Lo spd cool fan rly
• Logic
• Low ref
• Maf 12v ref
• Maf low ref
• Maf sen sig
• Main relay
• Main rly ctrl
• Mass air flow (maf) sensor (in air intake duct)
• Mil cntl
• Mil ind
• Pnk
• Radio
• S105
• Sens sig
• Starting system
• Stoplamp sw sig
• Strtr enable rly cntl
• Tan
• Tcm/ ipc/ ecm fuse 15a
• To even coils fuse (diagram 4 of 5)
• Transmission control module (tcm)
• Underhood fuse block (right front of engine compt)
• V8 ecm fuse 10a
• Vehicle speed sig

4.6L VIN A, Engine Performance Wiring Diagram (2 of 5) for Cadillac STS 2005

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (2 of 5) for Cadillac STS 2005:

• (34 cm from c102) s104
• (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
• Engine coolant temperature (ect) sensor (rear of right cylinder head
• Engine oil pressure (eop) sensor (left side of engine)
• Evaporative emission (evap) canister purge valve (rear of engine)
• From b underhood fuse block (diagram 4 of 5)
• Heated oxygen sensor (ho2s) bank 1 sensor 2 (downstream of right catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 2 (downstream of left catalytic converter)
• Manifold absolute pressure (map) sensor (front center of engine)
• Nca
• Post o2 fuse 15a
• Pre o2/ cam fuse 15a
• S101 (15 cm from fuel inj 5)
• Tan
• Underhood fuse block (right front of engine compt)

4.6L VIN A, Engine Performance Wiring Diagram (3 of 5) for Cadillac STS 2005

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (3 of 5) for Cadillac STS 2005:

• (in bottom of oil pan) engine oil level switch
• (in fuel tank meter assembly)
• (top right of fuel tank) fuel pump & sender assembly
• C3 engine control module (below left headlamp)
• Canister vent fuse 10a
• Ctrl actuator sig
• Eop 5v ref
• Eoplow ref
• Ftp 5v ref
• Ftp low ref
• Ftp sens sig
• Fuel lev sen sig
• Fuel level sensor
• Fuel pump
• Fuel pump motor relay
• Fuel pump mtr fuse 15a
• Fuel tank pressure (ftp) sensor
• G100 (rear of right cyl head)
• G401 (to rear of right rear shock tower)
• Ho2s hi 1,2
• Ho2s hi 2,2
• Ho2s high 1,1
• Ho2s high 2,1
• Ho2s htr 1,1
• Ho2s htr 1,2
• Ho2s htr 2,1
• Ho2s htr 2,2
• Ho2s input pmp 1,1
• Ho2s input pmp 2,1
• Ho2s lo 1,1
• Ho2s lo 1,2
• Ho2s lo 2,1
• Ho2s lo 2,2
• Ho2s output pmp 1,1
• Ho2s output pmp 2,1
• Hot at all times
• Oil lev sw sig
• Oil pressure sen sig
• R12
• R13
• R15
• R40
• Right rear fuse block (under right side of rear seat)
• S406 (28 cm from fuel tank press sensor)
• Secondary fuel sender assembly
• Splice pack
• Tan
• Transmissions system

4.6L VIN A, Engine Performance Wiring Diagram (4 of 5) for Cadillac STS 2005

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (4 of 5) for Cadillac STS 2005:

• (14 cm from fuel inj 7) s102
• (16 cm from fuel inj 8) s103
• (31 cm from ign coil module 8) s135
• (36 cm from ign coil module 2)
• (3o cm from ign coil module 1)
• (rear side of right cyl head) g107
• D d
• Even coils fuse 15a
• From main a relay (diagram 1 of 5)
• Fuel injector
• Ignition coil/ module
• Odd coils fuse 15a
• Pnk
• Pnk a
• Red
• Red b
• S131
• S133
• S142
• S144
• S146
• Tan
• To post o2 fuse (diagram 2 of 5)
• Underhood fuse block (right front of engine compt)

4.6L VIN A, Engine Performance Wiring Diagram (5 of 5) for Cadillac STS 2005

List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (5 of 5) for Cadillac STS 2005:

• (front of left cyl head) camshaft position sensor exhaust bank 2 low ref
• (front of left cyl head) camshaft position sensor intake bank 2
• (front of left cylinder head)
• (front of right cyl head) camshaft position sensor exhaust bank 1 low ref
• (front of right cyl head) camshaft position sensor intake bank 1 low ref
• (on throttle body) throttle position sensor
• (under intake manifold) crankshaft position sensor low ref
• 12v
• Camshaft position actuator solenoid exhaust bank 1 (front of right cyl head)
• Camshaft position actuator solenoid exhaust bank 2 (front of left cyl head)
• Camshaft position actuator solenoid intake bank 1 (front of right cyl head)
• Camshaft position actuator solenoid intake bank 2 (front of left cyl head)
• Charging circuit
• Ckp 12v ref
• Ckp low ref
• Ckp sen 1 sig
• Cmp act sol b1 exhst
• Cmp act sol b1 intk
• Cmp act sol b2 exhst
• Cmp act sol b2 intk
• Cmp b1 ex low ref
• Cmp b1 in 12v ref
• Cmp b1 in low ref
• Cmp b2 ex 12v ref
• Cmp b2 ex low ref
• Cmp b2 in 12v ref
• Cmp b2 in low ref
• Cmp bi ex 12v ref
• Cmp sen sig b1 exhst
• Cmp sen sig b1 intk
• Cmp sen sig b2 exhst
• Cmp sen sig b2 intk
• Ect low ref
• Ect sen sig
• Engine control module (ecm) (below left headlamp)
• Evap can prg sol cntl
• Fuel inj 1 cntl
• Fuel inj 2 cntl
• Fuel inj 3 cntl
• Fuel inj 4 cntl
• Fuel inj 5 cntl
• Fuel inj 6 cntl
• Fuel inj 7 cntl
• Fuel inj 8 cntl
• G100
• G100 (rear side of right cyl head)
• Gen field duty cyc sig
• Gen turn on sig
• Ground
• Ic 1 cntl
• Ic 2 cntl
• Ic 3 cntl
• Ic 4 cntl
• Ic 5 cntl
• Ic 6 cntl
• Ic 7 cntl
• Ic 8 cntl
• Knock sen 1 sig
• Knock sen 2 sig
• Knock sensor (ks) 1 (under intake manifold)
• Knock sensor (ks) 2 (under intake manifold)
• Ks1 low ref
• Ks2 low ref
• Low ref
• Map 5v ref
• Map low ref
• Map sen sig
• S112
• Sen sig
• Tac mtr cntl 1
• Tac mtr cntl 2
• Tan
• Tps 1 sig
• Tps 2 sig
• Tps 5v ref
• Tps low ref