ENGINE PERFORMANCE – Buick Lucerne CXL 2006 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

3.8L VIN 2

3.8L VIN 2, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXL 2006

List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXL 2006:

• (1 in) from branch for c139)
• (in engine harness, approximately 3 cm
• (left side of oil pan)
• (lower left rear of engine)
• (on left side of engine, near starter)
• (on top front of engine)
• (on top right rear of engine)
• (pins 62-72 not used)
• 5 volt ref 1
• 5 volt ref 2
• Camshaft sig
• Ect sensor sig
• Egr pos sig
• Egr sol high
• Egr sol low
• Engine coolant temperature sensor (left rear of engine)
• Engine oil level switch
• Engine oil pressure switch (near oil
• Evap purge sol
• Evaporative emission (evap) canister purge solenoid valve (on top right rear of engine)
• Exhaust gas recirculation valve
• Filter)
• Fuel inj 1
• Fuel inj 2
• Fuel inj 3
• Fuel inj 4
• Fuel inj 5
• Fuel inj 6
• Fuel injectors (1,3,5: top left side of engine) (2,4,6: top right side of engine)
• G112
• G112 (lower left rear of engine)
• Gen field
• Gen on sig
• Ground
• Heated oxygen sensor (ho2s) 1 (on right exhaust manifold)
• Ho2s heater 1
• Ho2s sig high
• Ho2s sig low
• Ic timing ctrl
• Ic timing sig
• Knock sensor 1
• Knock sensor 2
• Knock sensor 2 (on right side of engine, below exhaust manifold)
• Low eng speed
• Low ref
• Manifold absolute pressure sensor
• Map sensor sig
• Med eng speed
• Nca
• Oil level sw
• Oil press sig
• Pnk
• Powertrain control module
• S109
• Starting/charging system
• Tan
• Tan/pnk
• Uart data

3.8L VIN 2, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXL 2006

List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXL 2006:

• (at left front of engine, under ignition coils)
• (lower left rear of engine)
• (on left front of engine, next to crankshaft balancer) crankshaft position sensor
• (on right front of engine)
• 5 volt ref
• Aap sensor 1
• Accelerator pedal position switch (under left side of dash)
• App sensor 2
• Body control module (right of glove box)
• Camshaft position sensor
• Fuel inj/coil fuse 24 15a
• Fuel inj/coil fuse 25 15a
• G112
• G115 (lower left rear of engine)
• Ground
• Hot in run or start
• Ign 1 volt
• Ignition control module (icm)
• Low ref
• Pnk
• Primary uart
• S145
• S164
• Sec uart
• Spark plugs
• Stop lamp
• Stop lamp switch signal
• Strut tower)
• Tan
• Throttle actuator control module (on throttle body assembly)
• Trans ign 3 fuse 6 10a
• Underhood fuse block (on right front of engine compt, forward of
• Underhood fuse block (on right front of engine compt, forward of strut tower)
• Vehicle spd

3.8L VIN 2, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXL 2006

List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXL 2006:

• (lower left rear of engine)
• 1-2 shift solenoid
• 2-3 shift solenoid
• A red
• A/t fluid temp sensor
• At iss sig
• Automatic transaxle
• B tan
• Boost sol
• G112
• Ho2s heater 2
• Ho2s sig high
• Ho2s sig low
• Iat sensor sig
• Input shaft speed sensor
• Low ref
• Maf sensor sig
• Pc sol
• Pnk
• Powertrain control module (front left side of engine compt, inside air cleaner cleaner housing)
• Pressure control solenoid
• Red
• Shift sol
• System interlock shift
• Tan
• Tan/pnk
• Tcc release switch
• Tcc sol
• Tcc sw sig
• Tft sensor sig
• Torque converter clutch solenoid
• Tr sig a
• Tr sig b
• Tr sig c
• Tr sig p
• Trans- mission internal mode switch
• Vehicle speed sensor (in transmission)
• Vss sig

3.8L VIN 2, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXL 2006

List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXL 2006:

• (under left rear seat)
• (under vehicle after catalytic converter on exhaust)
• Compartment, in air intake tube)
• Crnk relay
• Ecm/crnk fuse 23 15a
• Fuel pp fuse 11 20a
• Fuel pp relay 7
• G112 (lower left rear of engine)
• G301
• Heated oxygen sensor (ho2s) 2
• Hot at all times
• Hot in run & start
• Iat
• Intake temperature sensor (left side of engine
• Maf
• Mass air flow/air
• Nca
• Oxy pst fuse 21 10a
• P/train relay 4
• Pwr trn fuse 22 15a
• Rear fuse block (below left side
• S101
• Side of rear seat)
• Strut tower)
• Tan
• Tan d
• Tan/pnk
• Underhood fuse block (on right front of engine compt, forward of

3.8L VIN 2, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXL 2006

List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXL 2006:

• (below rear of vehicle, on evap canister)
• (front left side of engine compartment, inside air cleaner housing)
• (in body harness)
• (in steering column harness, between c203 ignition switch switch connector) s201
• (right front wall of luggage compartment)
• 5 volt ref 1
• A/c clutch relay
• A/c press sig
• A/c refrigerant pressure sensor (near a/c compressor, on hose assembly)
• Acc
• Air conditioning system
• B c309
• Battery
• Body control module (right of glove box)
• C309
• Cnstr vent fuse 5 10a
• Computer data lines system
• Cooling fans system
• Ecm ign 3 fuse 5 10a
• Ecm/tcm fuse 28 15a
• Evap vent sol
• Evaporative emissions (evap) canister vent solenoid valve
• Fuel level sig
• Fuel pump & sender assembly
• Fuel pump relay
• Fuel tank
• Fuel tank press
• Fuel tank pressure sensor
• G112 (lower left rear of engine)
• G300 (under driver's seat)
• G403
• High fan
• Hot at all times
• Hot in run & start
• Ignition 1
• Ignition switch
• Instrument panel cluster
• Logic
• Low fan
• Low ref
• Malfunction indicator lamp (mil)
• Mil control
• Off
• Pcm relay ctrl
• Pnk
• Powertrain control module
• Rear fuse block (below left side
• Relay 6
• Run
• Run/ crank
• S203
• S316
• Side of rear seat)
• Start
• Starter enable
• Starting/charging system
• Stop lamp sw
• Strut tower)
• Tan
• Underhood fuse block (on right front of engine compt, forward of
• Vehicle speed sig
• Wakeup data

4.6L VIN Y

4.6L VIN Y, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXL 2006

List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXL 2006:

• (left rear of engine compartment) transmission control module (tcm)
• (lower left rear of engine)
• (not used) c
• (right of glove box)
• (under center
• 5v ref 1
• 5v ref 2
• A/c com clutch rly
• Acc wake up serial data
• Accelerator pedal position (app) sensor (top of accelerator
• Accessory wake up
• Air conditioning system
• App sensor 1 sig
• App sensor 2 sig
• Battery pos volt
• Body control module (bcm)
• Cooling fans system
• Ecm ign 3 fuse 10a
• Ecm/crnk fuse 15a
• Engine control module (ecm) (left side of engine compartment)
• Engine oil level switch (left side of oil pan)
• Engine oil pressure (eop) switch (near oil filter)
• Evap canister vent
• Exterior lights system
• Fan relay ctrl
• Fuel pump rly ctrl
• Fuel tank pressure (ftp) sensor
• G112
• Hot at all times
• Hot in run or start
• Ign
• Ignition 1 voltage
• Instrument panel cluster (ipc)
• Logic
• Low reference
• Malfunction indicator lamp (mil)
• Mil control
• Of vehicle, on top of fuel tank)
• Oss hi sig
• Oss low sig
• Oxy pst fuse 10a
• Pedal assembly)
• Pnk
• Power distribution system
• Pressure sns sig
• Primary fuel level
• Pwr/train relay
• Rly ctrl
• Run/crnk relay
• S104 (approximately 13 cm (5 in) from breakout to c138)
• S105
• Starter rly coil
• Starting/ charging system
• Stop lamp sw sig
• Tan
• To fuse pwr trn fuse 15a (diagram 4 of 5)
• Underhood fuse block (on right front of engine compartment, forward of strut tower)
• Vehicle speed sensor (vss) (in transmission)

4.6L VIN Y, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXL 2006

List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXL 2006:

• (below rear of vehicle, on evap canister) evaporative emissions (evap) canister vent solenoid valve
• (near a/c compressor, on hose assembly)
• (top of fuel tank) fuel pump & sender assembly
• (under left rear seat)
• 5v ref 1
• 5v ref 2
• A/c refrigerant pressure sensor
• Air pump relay ctrl
• Cnstr vent fuse 10a
• Cooling fans system
• Ctrl bank 2 sns 1
• Ecm/tcm fuse 15a
• Engine control module (ecm) (left side of engine compartment)
• Evap canister purge
• Field duty cycle sig
• Fuel pump fuse 20a
• Fuel/ pump relay
• G301
• G403 (right front wall of luggage compartment)
• Hot at all times
• Low reference
• Low speed cooling
• Oil level sw sig
• Park/neutral
• Pnk
• Rear fuse block (below left side of rear seat)
• Ref bank 2 sns 1
• Reverse lockout sol
• S100
• S316 (in body harness, approximately 5 cm (2 in) from breakout for electronic suspension control module)
• Serial data bus -
• Starting/ charging system
• Tan
• Transmission system
• Turn on signal
• Volt bank 2 sns 1

4.6L VIN Y, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXL 2006

List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXL 2006:

• (in engine harness, approximately
• (lower left front corner of engine compartment) secondary air injection (air) pump
• (lower left rear of engine)
• (on top right rear of engine) evaporative emissions (evap) canister purge solenoid valve
• (top rear of engine, on center of rear camshaft cover)
• 10 cm (4 in
• A/c com clutch
• Air pump fuse 50a
• Air pump relay
• Air/ sol relay
• Air/sol fuse 15a
• Computer data lines system
• Ect sensor sig
• Engine control module (ecm) (left side of engine compartment)
• Engine coolant temperature (ect) sensor (right rear of engine)
• G115
• Heated oxygen sensor (ho2s) bank 2 sensor 1 (in left exhaust manifold)
• Hot at all times
• Hot in run or start
• Manifold absolute pressure (map) sensor (on top rear of engine)
• Map sensor sig
• Nca
• Oil pre sw signal
• Pnk
• Pre sns sig
• Red
• S106
• Secondary air injection (air) check valve
• Serial data bus +
• Tan
• Underhood fuse block (on right front of engine compartment, forward of strut tower)

4.6L VIN Y, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXL 2006

List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXL 2006:

• (below exhaust gas recirculation
• (egr) valve)
• (in engine harness
• (in engine harness, approximately 7 cm (4 in) from branch for c139 toward breakout for c318) s102
• (in engine harness, approximately 3 cm (1 in) from branch for c139) s109
• (in even bank ignition coil harness, between c139 & ignition coil/module 8) s135
• (in even bank ignition coil harness, pnk
• (in odd bank ignition coil harness, between c140 & ignition tan
• (in odd bank ignition coil harness, between c140 & ignition coil/module 7) s142
• (on right front of engine compartment, forward of strut tower)
• (on top right rear of engine) exhaust gas recirculation (egr) valve
• (top left side of engine)
• (top right side of engine)
• Approximately 6 cm (2 in) from branch for engine coolant temperature (ect) sensor)
• Between c139 & ignition coil/module 8) s131
• Coil/module 7) s146
• Ctrl
• From ecm/crnk fuse 15a (diagram 1 of 5)
• Fuel injector (top left side of engine)
• Fuel injector (top right side of engine)
• G100
• Gnd
• Ign
• Ignition coil/module 1
• Ignition coil/module 2
• Ignition coil/module 3
• Ignition coil/module 4
• Ignition coil/module 5
• Ignition coil/module 6
• Ignition coil/module 7
• Ignition coil/module 8
• Inj/coil fuse 15a
• Low
• Nca
• Plug spark
• Pnk
• Pnk/tan
• Pwr trn fuse 15a
• Red
• Red b
• S110
• S133
• S144
• Tan
• Tan c
• Underhood fuse block

4.6L VIN Y, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXL 2006

List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXL 2006:

• (left side of engine compartment, in air intake tube)
• (under center of vehicle, after catalytic converter)
• 5v ref 1
• 5v ref 2
• Camshaft position (cmp) sensor (on right front of engine)
• Ckp sensor sig
• Cmp sensor sig
• Crankshaft position (ckp) sensor (top center of engine)
• Egr sol high ctrl
• Egr sol low ctrl
• Egr valve pos sig
• Engine control module (ecm) (left side of engine compartment)
• Fuel injector 1
• Fuel injector 2
• Fuel injector 3
• Fuel injector 4
• Fuel injector 5
• Fuel injector 6
• Fuel injector 7
• Fuel injector 8
• G112 (lower left rear of engine)
• Heated oxygen sensor (ho2s) 2
• Heated oxygen sensor (ho2s) bank 1 sensor 1 (on right exhaust manifold)
• Heater low ctrl
• Ho2s 2 high sig
• Ho2s 2 low sig
• Iat sensor sig
• Ic 1 control
• Ic 2 ctrl
• Ic 3 control
• Ic 4 control
• Ic 5 ctrl
• Ic 6 ctrl
• Ic 7 ctrl
• Ic 8 control
• Ignition 1 voltage
• Knock sensor 1 (top right side of engine)
• Knock sensor 2 (top left side of engine)
• Knock sns 1 signal
• Knock sns 2 sig
• Knock sns low ref
• Low ref
• Low reference
• Maf sensor sig
• Mass air flow (maf)/ intake air temperature (iat) sensor
• Nca
• Pnk
• Pnk/red
• Pnk/tan
• Ref bank 1 sen 1
• S105
• Signal ground
• Tac motor ctrl 1
• Tac motor ctrl 2
• Tan
• Tan/pnk
• Throttle body assembly
• Tp sensor 1 sig
• Tp sensor 2 sig
• Volt bank 1 sns 1