AIR CONDITIONING – Buick LaCrosse CX 2006 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

3.6L VIN 7

3.6L VIN 7, Automatic A/C Wiring Diagram (1 of 2) for Buick LaCrosse CX 2006

List of elements for 3.6L VIN 7, Automatic A/C Wiring Diagram (1 of 2) for Buick LaCrosse CX 2006:

• (in back of right headlamp on frame) g100
• (in engine wiring harness, approximately 20 cm from g115) (w/ sulev) s114
• (mounted to bank no 1 cylinder head above exhaust manifold) g115
• (on front of a/c compressor) a/c compressor clutch
• A/c clu diode
• A/c clutch fuse 13 10a
• A/c comp relay
• A/c compressor clutch solenoid
• A/c compressor temperature switch
• A/c request ind
• A/c request switch
• A10
• A11
• A12
• A18
• A19
• Air temp a
• Air temp b
• Auto
• B10
• B11
• B12
• Battery
• Blower motor sw
• C18
• C19
• Class 2 serial
• Computer data lines system interior lights system
• Defogger
• E10
• Fan 1 fuse 29 30a
• Fan 1 relay
• Fan 2 fuse 32 30a
• Fan 2 relay
• Fan 3 relay
• G202 (left side of dash, at base of steering column)
• Ground
• High
• Hot at all times
• Hot in run or start
• Hvac control module (center of dash)
• Ign 1 volt
• Illum
• Ind
• K14
• K15
• K18
• K19
• L14
• Left air temperature actuator (left side of hvac module)
• Logic
• Low
• Low ref
• Lower left air temperature sensor
• Lower right air temperature sensor
• M14
• M15
• M18
• M19
• Mode actuator (on lower right side of dash)
• Mode door
• Nca
• Off
• Pnk
• Rear defogger switch
• Recirculation a
• Recirculation actuator (in right footwell)
• Recirculation b
• Right air temperature actuator (right side of hvac module)
• S211 (in dash harness, at center of dash)
• Sensor sig
• Speed ctrl
• Tan
• Underhood fuse block (mounted to right strut tower)

3.6L VIN 7, Automatic A/C Wiring Diagram (2 of 2) for Buick LaCrosse CX 2006

List of elements for 3.6L VIN 7, Automatic A/C Wiring Diagram (2 of 2) for Buick LaCrosse CX 2006:

• (in dash harness, at center of dash) s211
• (in off-engine wiring harness, approximately 32 cm from underhood fuse block towards transmission control module)
• 5v reference 2
• A/c comp clutch
• A/c press signal
• A/c refrigerant pressure sensor (on left side of engine compt, on accumulator)
• Batt main 4 fuse 30 30a
• Battery
• Blower motor (behind right side of dash, in hvac module)
• Blower motor control processor (on lower right side of dash)
• Class 2 serial
• Computer data lines system
• D11
• Display fuse 18 10a
• Ect sens sig
• Engine control module (ecm) (top of engine)
• Engine controls system
• Engine coolant temperature (ect) sensor (left side of engine block, above exhaust manifold)
• G200 (center of dash cross beam, behind radio)
• G202 (left side of dash, at base of steering column)
• Gnd
• Hot at all times
• Hot in run or start
• Hvac fuse 10a
• I/p fuse block (behind left side of dash)
• Ign 1 volt
• Inside air temperature sensor (left side of dash)
• Left cooling fan motor (on left side of radiator)
• Low ref
• Pnk
• Red
• Relay ctrl
• Right cooling fan motor (on right b
• S118
• S119 (in on-engine wiring harness, approximately 34.5 cm from engine control module)
• S213 (in dash harness, at center of dash)
• Speed ctrl
• Sunload sensor assembly (top center of dash)
• Tan
• Underhood fuse block (mounted to right strut tower)
• Upper left air temperature sensor (center of dash, in left ventilation duct)
• Upper right air temperature sensor (center of dash, in right ventilation duct)

3.6L VIN 7, Compressor Wiring Diagram for Buick LaCrosse CX 2006

List of elements for 3.6L VIN 7, Compressor Wiring Diagram for Buick LaCrosse CX 2006:

• (in engine wiring harness, approximately 20 cm from g115) (w/ sulev) s114
• (in off-engine wiring harness, approximately 32 cm from underhood fuse block towards transmission control module)
• (mounted to bank no. 1 cylinder head above exhaust manifold) g115
• (on front of a/c compressor) a/c compressor clutch
• 5v reference 2
• A/c clu diode
• A/c clutch fuse 13 10a
• A/c comp clutch
• A/c comp relay
• A/c compressor clutch solenoid
• A/c compressor temperature switch
• A/c press signal
• A/c refrigerant pressure sensor (on left side of engine compt, on accumulator)
• A/c request ind
• A/c request switch
• Battery
• Class 2 serial
• Computer data lines system
• Display fuse 18 10a
• Engine control module (ecm) (top of engine)
• Engine controls system
• G202 (left side of dash, at base of steering column)
• Ground
• Hot at all times
• Hot in run or start
• Hvac control module (center of dash)
• Hvac fuse 10a
• I/p fuse block (behind left side of dash)
• Ign 1 volt
• Logic
• Low ref
• Nca
• Pnk
• S118
• S211 (in dash harness, at center of dash)
• Underhood fuse block (mounted to right strut tower)

3.8L VIN 2

3.8L VIN 2, Automatic A/C Wiring Diagram (1 of 2) for Buick LaCrosse CX 2006

List of elements for 3.8L VIN 2, Automatic A/C Wiring Diagram (1 of 2) for Buick LaCrosse CX 2006:

• (in back of right headlamp on frame) g100
• (in engine wiring harness, approximately 20 cm from g115) (w/ sulev) s114
• (on front of a/c compressor) a/c compressor clutch
• (on transmission stud, to right of starter) g115
• A/c clu diode
• A/c clutch fuse 13 10a
• A/c comp relay
• A/c request ind
• A/c request switch
• A10
• A11
• A12
• A18
• A19
• Air temp a
• Air temp b
• Auto
• B10
• B11
• B12
• Battery
• Blower motor sw
• C18
• C19
• Class 2 serial
• Computer data lines system
• Defogger
• E10
• Fan 1 fuse 29 30a
• Fan 1 relay
• Fan 2 fuse 32 30a
• Fan 2 relay
• Fan 3 relay
• G202 (left side of dash, at base of steering column)
• Ground
• High
• Hot at all times
• Hot in run or start
• Hvac control module (center of dash)
• Ign 1 volt
• Illum
• Ind
• Interior lights system
• K14
• K15
• K18
• K19
• L14
• Left air temperature actuator (left side of hvac module)
• Logic
• Low
• Low ref
• Lower left air temperature sensor
• Lower right air temperature sensor
• M14
• M15
• M18
• M19
• Mode actuator (on lower right side of dash)
• Mode door
• Off
• Pnk
• Rear defogger switch
• Recirculation a
• Recirculation actuator (in right footwell)
• Recirculation b
• Right air temperature actuator (right side of hvac module)
• S211 (in dash harness, at center of dash)
• Sensor sig
• Speed ctrl
• Tan
• Underhood fuse block (mounted to right strut tower)

3.8L VIN 2, Automatic A/C Wiring Diagram (2 of 2) for Buick LaCrosse CX 2006

List of elements for 3.8L VIN 2, Automatic A/C Wiring Diagram (2 of 2) for Buick LaCrosse CX 2006:

• (in dash harness, at center of dash) s211
• 5v reference 1
• A/c comp clutch
• A/c press signal
• A/c refrigerant pressure sensor (on left side of engine compt, on accumulator)
• Batt main 4 fuse 30 30a
• Battery
• Blower motor (behind right side of dash, in hvac module)
• Blower motor control processor (on lower right side of dash)
• Class 2 serial
• Computer data lines system
• D11
• Display fuse 18 10a
• Ect sens sig
• Engine coolant temperature (ect) sensor (on top right of intake manifold)
• G200 (center of dash cross beam, behind radio)
• G202 (left side of dash, at base of steering column)
• Gnd
• Hot at all times
• Hot in run or start
• Hvac fuse 10a
• I/p fuse block (behind left side of dash)
• Ign 1 volt
• Inside air temperature sensor (left side of dash)
• Left cooling fan motor (on left side of radiator)
• Low ref
• Pnk
• Powertrain control module (pcm)
• Red
• Relay ctrl
• Right cooling fan motor (on right b
• S213 (in dash harness, at center of dash)
• Speed ctrl
• Sunload sensor assembly (top center of dash)
• Tan
• Underhood fuse block (mounted to right strut tower)
• Upper left air temperature sensor (center of dash, in left ventilation duct)
• Upper right air temperature sensor (center of dash, in right ventilation duct)

3.8L VIN 2, Compressor Wiring Diagram for Buick LaCrosse CX 2006

List of elements for 3.8L VIN 2, Compressor Wiring Diagram for Buick LaCrosse CX 2006:

• (dash harness, at center of dash) s211
• (engine harness, 20cm from g115)
• (on front of a/c compressor) a/c compressor clutch
• (w/ sulev) s114
• 5v reference
• A/c clu diode
• A/c clutch fuse 13 10a
• A/c comp clutch
• A/c comp relay
• A/c press signal
• A/c refrigerant pressure sensor (on left side of engine compt, on accumulator)
• A/c request ind
• A/c request switch
• Automatic a/c
• Battery
• Class 2 serial
• Computer data lines system
• Display fuse 18 10a
• G115 (on transaxle stud, to right of starter)
• G202 (left side of dash, at base of steering column)
• Ground
• Hot at all times
• Hot in run or start
• Hvac control module (center of dash)
• Hvac fuse 10a
• I/p fuse block (behind right side of dash)
• Ignition 1
• Logic
• Low ref
• Manual a/c
• Pnk
• Powertrain control module (pcm) (left front side of engine compt, in air cleaner assembly)
• Underhood fuse block (mounted to right strut tower)

3.8L VIN 2, Manual A/C Wiring Diagram for Buick LaCrosse CX 2006

List of elements for 3.8L VIN 2, Manual A/C Wiring Diagram for Buick LaCrosse CX 2006:

• (in dash harness, at center of dash) s211
• (in engine wiring harness, approxi- mately 20 cm from g115)
• (on front of a/c compressor) a/c compressor clutch
• (w/ sulev) s114
• 5v reference 1
• A/c clu diode
• A/c clutch fuse 13 10a
• A/c comp clutch
• A/c comp relay
• A/c press signal
• A/c refrigerant pressure sensor (on left side of engine compt, on accumulator)
• A/c request ind
• A/c request switch
• A10
• A11
• A12
• A18
• A19
• Air temp a
• Air temp b
• Air temperature actuator
• B10
• B11
• B12
• Batt main 4 fuse 30 30a
• Battery
• Blower motor (behind right side of dash, in hvac module)
• Blower motor control processor (on lower right side of dash)
• Blower motor sw
• C18
• C19
• Class 2 serial
• Computer data lines system
• Defogger
• Display fuse 18 10a
• E10
• Ect sens sig
• Engine coolant temperature (ect) sensor (on top right of intake manifold)
• Fan 1 fuse 29 30a
• Fan 1 relay
• Fan 2 fuse 32 30a
• Fan 2 relay
• Fan 3 relay
• G100 (in back of right headlamp on frame)
• G115 (on transmission stud, to right of starter)
• G200 (center of dash cross beam, behind radio)
• G202 (left side of dash, at base of steering column)
• Gnd
• Ground
• High
• High spd cooling
• Hot at all times
• Hot in run or start
• Hvac control module (center of dash)
• Hvac fuse 10a
• I/p fuse block (behind left side of dash)
• Ignition 1
• Illum
• Ind
• Interior lights system
• K14
• K15
• K18
• K19
• L14
• Left cooling fan motor (on left side of radiator)
• Logic
• Low
• Low ref
• Low spd cooling
• M14
• M15
• M18
• M19
• Mode actuator (on lower right side of dash)
• Mode door
• Mode switch
• Off
• Pnk
• Powertrain control module (pcm)
• Rear defogger switch
• Recirculation
• Recirculation a
• Recirculation actuator (in right footwell)
• Recirculation b
• Recirculation switch
• Red
• Right cooling fan motor (on right side of radiator)
• S213 (in dash harness, at center of dash)
• Speed ctrl
• Tan
• Temperature control sw
• Underhood fuse block (mounted to right strut tower)