AIR CONDITIONING – Cadillac CTS 2014 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Automatic A/C Wiring Diagram, Coupe (1 of 2) for Cadillac CTS 2014

List of elements for Automatic A/C Wiring Diagram, Coupe (1 of 2) for Cadillac CTS 2014:

• (hvac harness, near driver air temperature actuator)
• (hvac harness, near mode actuator)
• (left kick panel) g201
• (or pnk)
• (right front of engine compt) g102
• 5-volt ref 3
• Air quality sensor (under right side of engine compt cowl panel)
• Air recirculation door actuator (left side of hvac blower housing)
• Auto switch
• Batt pos volt
• Blower motor (right side of hvac module)
• Blower motor control module (lower left side of blower motor)
• Blower motor switch
• Blwr fuse 40a
• Blwr mtr spd ctrl
• Blwr mtr sply volt
• Body control module (bcm) (left end of dash)
• Computer
• Computer data lines system
• Data lines system
• Defogger switch
• Defogger system
• Display fuse 15a
• Dr ctrl circuit
• Dr pos sig
• Dr sig
• Evaporator temperature sensor (right side of evaporator case)
• G201 (left kick panel)
• Gnd
• Hot at all times
• Hot w/ ignition main relay energized
• Hvac control module (lower right end of dash)
• Ign
• Ign 3 volt
• Isrvm fuse 7.5a
• J201
• J202
• J211
• J225
• J230
• Left air temperature door actuator (left side of hvac module)
• Left air temperature switch
• Lo dr pos sig
• Lo ref
• Lo spd gmlan
• Logic
• Low ref
• Mode door actuator (right side of hvac module)
• Mode dr ctrl
• Mode switch
• Pnk
• Pos sig
• Power distribution system
• Radio/hvac control
• Rec dr ctrl
• Rec dr pos sig
• Recirculation switch
• Red
• Right air temp
• Right air temperature door actuator (right side of hvac module)
• Right air temperature switch
• Rly ctrl
• Sens sig
• Spd sig
• Temp dr ctrl
• Underhood fuse block (right front of engine compt)
• W/ dvd
• W/o dvd
• X204
• X208
• X225
• X270

Automatic A/C Wiring Diagram, Coupe (2 of 2) for Cadillac CTS 2014

List of elements for Automatic A/C Wiring Diagram, Coupe (2 of 2) for Cadillac CTS 2014:

• (3.6l & 3.0l) (6.2l)
• (6.2l) (3.0l & 3.6l)
• (or 2761)
• (rear of right cylinder bank) g132
• 3.0l & 3.6l
• 3.6l & 3.0l
• 5-volt ref 5-volt ref 1
• 6.2l
• 87a
• A/c cltch fuse 10a
• A/c compressor clutch (6.2l: lower right front of engine) (except 6.2l: lower left front of engine)
• A/c compressor clutch relay
• A/c compressor clutch rly ctrl
• A/c refrigerant press sens sig
• A/c refrigerant pressure sensor (on a/c refrigerant line)
• Ambient air temperature sensor (behind right center of front fascia)
• Ambient light/ sunload sensor (top center of dash)
• Charge air cooler (cac) coolant pump (bottom right rear of radiator)
• Charge air cooler (cac) coolant pump relay (6.2l) (right rear of engine compt)
• Charge air cooler coolant pump ctrl
• Computer data lines system
• Cooling fan high speed relay (3.6l & 3.0l) cooling fan speed control relay (6.2l)
• Cooling fan low speed relay (3.6l & 3.0l) cooling fan high speed relay (6.2l)
• Cooling fan medium speed relay (3.6l & 3.0l) left cooling fan high speed relay (6.2l)
• Cooling fan motor (behind radiator)
• Cooling fan resistor
• Ect sens sig
• Emis 2 fuse 15a
• Engine control module (ecm) (6.2l: right rear of engine compt) (3.0l & 3.6l: below left headlamp assembly)
• Engine coolant temperature (ect) sensor (6.2l: left front side of left cylinder bank) (3.0l: left side of engine block) (3.6l: left rear of engine block)
• Fan 1 fuse 30a 40a
• Fan 2 fuse 30a (3.6l & 3.0l) 40a (6.2l)
• G101 (on left radiator support)
• G104 (right front of engine compt)
• G132 (rear of right cylinder bank)
• Hi spd cooling fan rly ctrl
• Hi spd gmlan serial data bus -
• Hi spd gmlan serial data bus+
• Hot at all times
• Hot w/ engine controls ignition relay energized
• Inclr fuse 10a
• Inside air temperature sensor (left center of dash)
• Left cooling fan motor (behind left side of radiator)
• Lo ref
• Lo spd cooling fan rly ctrl
• Pnk
• Power distribution system
• Right cooling fan motor (behind right side of radiator)
• Splice pack jx201 (near accelerator pedal position sensor)
• Tan
• Underhood fuse block (right front of engine compt)
• X130
• X204

Automatic A/C Wiring Diagram, Sedan CTS-V (1 of 2) for Cadillac CTS 2014

List of elements for Automatic A/C Wiring Diagram, Sedan CTS-V (1 of 2) for Cadillac CTS 2014:

• (hvac harness, near driver air temperature actuator)
• (hvac harness, near mode actuator)
• (left kick panel) g201
• (or pnk)
• (right front of engine compt) g102
• 5-volt ref 3
• Air quality sensor (under right side of engine compt cowl panel)
• Air recirculation door actuator (left side of hvac blower housing)
• Auto switch
• Batt pos volt
• Blower motor (right side of hvac module)
• Blower motor control module (lower left side of blower motor)
• Blower motor switch
• Blwr fuse 40a
• Blwr mtr spd ctrl
• Blwr mtr sply volt
• Body control module (bcm) (left end of dash)
• Computer
• Computer data lines system
• Data lines system
• Defogger switch
• Defogger system
• Display fuse 15a
• Dr ctrl circuit
• Dr pos sig
• Dr sig
• Evaporator temperature sensor (right side of evaporator case)
• G201 (left kick panel)
• Gnd
• Hot at all times
• Hot w/ ignition main relay energized
• Hvac control module (lower right end of dash)
• Ign
• Ign 3 volt
• Isrvm fuse 7.5a
• J201
• J202
• J211
• J225
• J230
• Left air temperature door actuator (left side of hvac module)
• Left air temperature switch
• Lo dr pos sig
• Lo ref
• Lo spd gmlan
• Logic
• Low ref
• Mode door actuator (right side of hvac module)
• Mode dr ctrl
• Mode switch
• Pnk
• Pos sig
• Power distribution system
• Radio/hvac control
• Rec dr ctrl
• Rec dr pos sig
• Recirculation switch
• Red
• Right air temp
• Right air temperature door actuator (right side of hvac module)
• Right air temperature switch
• Rly ctrl
• Sens sig
• Spd sig
• Temp dr ctrl
• Underhood fuse block (right front of engine compt)
• W/ dvd
• W/o dvd
• X204
• X208
• X225
• X270

Automatic A/C Wiring Diagram, Sedan CTS-V (2 of 2) for Cadillac CTS 2014

List of elements for Automatic A/C Wiring Diagram, Sedan CTS-V (2 of 2) for Cadillac CTS 2014:

• (3.6l & 3.0l) (6.2l)
• (6.2l) (3.0l & 3.6l)
• (or 2761)
• (rear of right cylinder bank) g132
• 3.0l & 3.6l
• 3.6l & 3.0l
• 5-volt ref 5-volt ref 1
• 6.2l
• 87a
• A/c cltch fuse 10a
• A/c compressor clutch (6.2l: lower right front of engine) (except 6.2l: lower left front of engine)
• A/c compressor clutch relay
• A/c compressor clutch rly ctrl
• A/c refrigerant press sens sig
• A/c refrigerant pressure sensor (on a/c refrigerant line)
• Ambient air temperature sensor (behind right center of front fascia)
• Ambient light/ sunload sensor (top center of dash)
• Charge air cooler (cac) coolant pump (bottom right rear of radiator)
• Charge air cooler (cac) coolant pump relay (6.2l) (right rear of engine compt)
• Charge air cooler coolant pump ctrl
• Computer data lines system
• Cooling fan high speed relay (3.6l & 3.0l) cooling fan speed control relay (6.2l)
• Cooling fan low speed relay (3.6l & 3.0l) cooling fan high speed relay (6.2l)
• Cooling fan medium speed relay (3.6l & 3.0l) left cooling fan high speed relay (6.2l)
• Cooling fan motor (behind radiator)
• Cooling fan resistor
• Ect sens sig
• Emis 2 fuse 15a
• Engine control module (ecm) (6.2l: right rear of engine compt) (3.0l & 3.6l: below left headlamp assembly)
• Engine coolant temperature (ect) sensor (6.2l: left front side of left cylinder bank) (3.0l: left side of engine block) (3.6l: left rear of engine block)
• Fan 1 fuse 30a 40a
• Fan 2 fuse 30a (3.6l & 3.0l) 40a (6.2l)
• G101 (on left radiator support)
• G104 (right front of engine compt)
• G132 (rear of right cylinder bank)
• Hi spd cooling fan rly ctrl
• Hi spd gmlan serial data bus -
• Hi spd gmlan serial data bus+
• Hot at all times
• Hot w/ engine controls ignition relay energized
• Inclr fuse 10a
• Inside air temperature sensor (left center of dash)
• Left cooling fan motor (behind left side of radiator)
• Lo ref
• Lo spd cooling fan rly ctrl
• Pnk
• Power distribution system
• Right cooling fan motor (behind right side of radiator)
• Splice pack jx201 (near accelerator pedal position sensor)
• Tan
• Underhood fuse block (right front of engine compt)
• X130
• X204

Automatic A/C Wiring Diagram, Sedan Except CTS-V (1 of 5) for Cadillac CTS 2014

List of elements for Automatic A/C Wiring Diagram, Sedan Except CTS-V (1 of 5) for Cadillac CTS 2014:

• (hvac harness, on hvac assembly)
• (right kick panel) g202
• 5 volt ref
• 5 volt refr
• 5v ref
• Air quality sensor (under right side of engine compt cowl panel)
• Air recirculation door actuator (right side of hvac blower housing)
• Batt pos volt
• Blwr mtr spd ctrl
• Combined sig
• Computer data lines system
• Defogger system
• Displacement ctrl
• Displacement sply
• Driver sig
• G106 (right rear of engine compt)
• Gmlan serial data
• Gnd
• Hot w/ ignition main relay energized
• Humidity sens sig
• Humidity temp sens sig
• Hvac control module (lower right end of dash)
• Ign
• Ign volt 1
• Ip body ign fuse
• J202
• J240
• Left air temperature door actuator (left side of hvac module)
• Lo ref
• Logic
• Low refr
• Mode door actuator (left side of hvac module)
• Network bus 9
• Pnk
• Power distribution system
• Rr defog rly ctrl
• Sens sig
• Sply volt
• Temp sens sig
• Underhood fuse block (right front of engine compt)
• Windscreen temp sens sig
• Windshield temperature & inside moisture sensor (if equipped) (top center of windshield)
• X228
• X275
• X301
• X306

Automatic A/C Wiring Diagram, Sedan Except CTS-V (2 of 5) for Cadillac CTS 2014

List of elements for Automatic A/C Wiring Diagram, Sedan Except CTS-V (2 of 5) for Cadillac CTS 2014:

• (front of upper duct at upper right center of dash) duct right upper air temperature sensor
• (lower left center of dash on bottom of lower duct) duct left lower air temperature sensor
• (lower right center of dash on bottom of lower duct) duct right lower air temperature sensor
• (right side of evaporator case) a/c evaporator temperature sensor
• (right side of floor duct in right front footwell) (w/ front & rear electronic controls) auxiliary duct lower air temperature sensor
• (under center console on upper auxiliary duct) (w/ front & rear electronic controls) auxiliary duct upper air temperature sensor
• (upper left center of dash on bottom of upper duct) duct left upper air temperature sensor
• Auxiliary air temperature door actuator (w/ front & rear electronic controls) (lower right side of hvac module)
• Auxiliary hvac control module (w/ front & rear electronic controls)
• Auxiliary mode door actuator (w/ front & rear electronic controls) (lower left side of hvac module)
• Computer data lines system
• Electronic controls
• G202 (right kick panel)
• Gnd
• Ign 1 volt run/crank
• Interconnect network bus 9
• J218 (w/ front & rear electronic controls) (instrument panel harness, 16 cm above breakout to g202)
• J241 (hvac harness, on hvac assembly)
• J301
• Linear
• Logic
• Pnk
• Right air temperature door actuator (right side of hvac module)
• W/ front & rear
• W/o front & rear
• X204
• X275

Automatic A/C Wiring Diagram, Sedan Except CTS-V (3 of 5) for Cadillac CTS 2014

List of elements for Automatic A/C Wiring Diagram, Sedan Except CTS-V (3 of 5) for Cadillac CTS 2014:

• (lower right end of dash) hvac control module
• A/c compressor
• A/c compressor clutch
• A/c compressor solenoid valve
• Ambient light/sunload sensor (top center of dash)
• Anti-theft system
• Blower motor (right side of hvac module)
• Computer data lines system
• Display
• Electronic controls
• G107 (2.0l turbo: rear of cylinder head) (3.6l: rear of left cylinder bank)
• G202 (right kick panel)
• Headlights system
• Info display module
• Lin intrecnt net work bus
• Lo ref
• Logic
• Low speed gmlain
• Lower lh temp sens sig
• Lower rh temp sens sig
• Mode door ctrl
• Pass air temp dr ctrl
• Pass air temp dr sig
• Pass air temp mtr ctrl
• Pnk
• Pos sens sig
• Radio/hvac controls
• Recirculation dr ctrl
• Recirculation dr pos sig
• Red
• Rr dr mode ctrl
• Rr dr mtr sig
• Rr dr pos sig
• Rr temp dr ctrl
• Rr temp dr pos sig
• Rr temp mtr ctrl
• Temp dr ctrl
• Temp dr pos sig
• Temp sens sig
• W/ front & rear
• W/ onstar
• W/o front & rear electronic controls
• W/o onstar
• X150
• X224
• X275

Automatic A/C Wiring Diagram, Sedan Except CTS-V (4 of 5) for Cadillac CTS 2014

List of elements for Automatic A/C Wiring Diagram, Sedan Except CTS-V (4 of 5) for Cadillac CTS 2014:

• (not used)
• (w/ overseas delivery vehicle preparation) hot w/ battery saver relay 1 energized (w/o overseas delivery vehicle preparation) hot at all times
• 23a
• 3.6l turbo
• 33b
• Auxiliary underhood fuse block (right front of engine compt)
• Capacity cooling system
• Cooling fan control module (except 3.6l turbo w/ extra capacity cooling system) (left rear of cooling fan assembly)
• Cooling fan control module (except 3.6l turbo w/o extra capacity cooling system) (left rear of cooling fan assembly)
• Cooling fan motor (3.6l turbo) (behind radiator)
• Cooling fan motor (behind radiator)
• Except 3.6l turbo w/ extra
• Frt/hvac/ blwr fuse 40a
• Fuse 70a 100a
• G102 (right front of engine compt)
• Hot at all times
• Instrument panel fuse block (left end of dash)
• Rdo dvd/ hvac cntrl fuse 15a
• Red
• X126

Automatic A/C Wiring Diagram, Sedan Except CTS-V (5 of 5) for Cadillac CTS 2014

List of elements for Automatic A/C Wiring Diagram, Sedan Except CTS-V (5 of 5) for Cadillac CTS 2014:

• (not used)
• 2.0l turbo & 3.6l
• 3.6l turbo
• 5 volt ref
• 87a
• A/c cltch fuse 10a
• A/c compressor clutch relay
• A/c compressor clutch rly ctrl
• A/c refrigerant press sens sig
• A/c refrigerant pressure sensor (on a/c refrigerant line)
• Auxiliary underhood fuse block (right front of x6 engine compt)
• Battery fuse block (top of battery)
• Capacity cooling system
• Charge air cooler (cac) coolant pump (3.6l turbo) (bottom right rear of radiator)
• Charge air cooler coolant pump relay (3.6l turbo)
• Computer data lines system
• Cool fan fuse 60a
• Cool pump fuse 10a
• Cooling fan ctrl rly spd sig
• Cooling system
• Ect sens sig
• Engine control module (ecm) (lower right front of engine compt)
• Engine coolant temperature (ect) sensor (2.0l turbo: rear of cylinder head) (3.6l: left rear of engine block)
• Except 3.6l turbo w/ extra
• Except 3.6l turbo w/o extra
• Fuse 350a
• G109 (rear of right cylinder bank)
• Gmlan serial data (+) 1
• Gmlan serial data (-) 1
• Gnd
• Hot at all times
• Hot w/ engine controls ignition relay energized
• Htr rly ctrl
• J134 (engine harness, 13.5 cm from breakout to right front shock absorber)
• Lo ref
• Logic
• Red
• Sply volt
• Underhood fuse block (right front of engine compt)
• X126
• X150

Automatic A/C Wiring Diagram, Wagon (1 of 2) for Cadillac CTS 2014

List of elements for Automatic A/C Wiring Diagram, Wagon (1 of 2) for Cadillac CTS 2014:

• (hvac harness, near driver air temperature actuator)
• (hvac harness, near mode actuator)
• (left kick panel) g201
• (or pnk)
• (right front of engine compt) g102
• 5-volt ref 3
• Air quality sensor (under right side of engine compt cowl panel)
• Air recirculation door actuator (left side of hvac blower housing)
• Auto switch
• Batt pos volt
• Blower motor (right side of hvac module)
• Blower motor control module (lower left side of blower motor)
• Blower motor switch
• Blwr fuse 40a
• Blwr mtr spd ctrl
• Blwr mtr sply volt
• Body control module (bcm) (left end of dash)
• Computer
• Computer data lines system
• Data lines system
• Defogger switch
• Defogger system
• Display fuse 15a
• Dr ctrl circuit
• Dr pos sig
• Dr sig
• Evaporator temperature sensor (right side of evaporator case)
• G201 (left kick panel)
• Gnd
• Hot at all times
• Hot w/ ignition main relay energized
• Hvac control module (lower right end of dash)
• Ign
• Ign 3 volt
• Isrvm fuse 7.5a
• J201
• J202
• J211
• J225
• J230
• Left air temperature door actuator (left side of hvac module)
• Left air temperature switch
• Lo dr pos sig
• Lo ref
• Lo spd gmlan
• Logic
• Low ref
• Mode door actuator (right side of hvac module)
• Mode dr ctrl
• Mode switch
• Pnk
• Pos sig
• Power distribution system
• Radio/hvac control
• Rec dr ctrl
• Rec dr pos sig
• Recirculation switch
• Red
• Right air temp
• Right air temperature door actuator (right side of hvac module)
• Right air temperature switch
• Rly ctrl
• Sens sig
• Spd sig
• Temp dr ctrl
• Underhood fuse block (right front of engine compt)
• W/ dvd
• W/o dvd
• X204
• X208
• X225
• X270

Automatic A/C Wiring Diagram, Wagon (2 of 2) for Cadillac CTS 2014

List of elements for Automatic A/C Wiring Diagram, Wagon (2 of 2) for Cadillac CTS 2014:

• (3.6l & 3.0l) (6.2l)
• (6.2l) (3.0l & 3.6l)
• (or 2761)
• (rear of right cylinder bank) g132
• 3.0l & 3.6l
• 3.6l & 3.0l
• 5-volt ref 5-volt ref 1
• 6.2l
• 87a
• A/c cltch fuse 10a
• A/c compressor clutch (6.2l: lower right front of engine) (except 6.2l: lower left front of engine)
• A/c compressor clutch relay
• A/c compressor clutch rly ctrl
• A/c refrigerant press sens sig
• A/c refrigerant pressure sensor (on a/c refrigerant line)
• Ambient air temperature sensor (behind right center of front fascia)
• Ambient light/ sunload sensor (top center of dash)
• Charge air cooler (cac) coolant pump (bottom right rear of radiator)
• Charge air cooler (cac) coolant pump relay (6.2l) (right rear of engine compt)
• Charge air cooler coolant pump ctrl
• Computer data lines system
• Cooling fan high speed relay (3.6l & 3.0l) cooling fan speed control relay (6.2l)
• Cooling fan low speed relay (3.6l & 3.0l) cooling fan high speed relay (6.2l)
• Cooling fan medium speed relay (3.6l & 3.0l) left cooling fan high speed relay (6.2l)
• Cooling fan motor (behind radiator)
• Cooling fan resistor
• Ect sens sig
• Emis 2 fuse 15a
• Engine control module (ecm) (6.2l: right rear of engine compt) (3.0l & 3.6l: below left headlamp assembly)
• Engine coolant temperature (ect) sensor (6.2l: left front side of left cylinder bank) (3.0l: left side of engine block) (3.6l: left rear of engine block)
• Fan 1 fuse 30a 40a
• Fan 2 fuse 30a (3.6l & 3.0l) 40a (6.2l)
• G101 (on left radiator support)
• G104 (right front of engine compt)
• G132 (rear of right cylinder bank)
• Hi spd cooling fan rly ctrl
• Hi spd gmlan serial data bus -
• Hi spd gmlan serial data bus+
• Hot at all times
• Hot w/ engine controls ignition relay energized
• Inclr fuse 10a
• Inside air temperature sensor (left center of dash)
• Left cooling fan motor (behind left side of radiator)
• Lo ref
• Lo spd cooling fan rly ctrl
• Pnk
• Power distribution system
• Right cooling fan motor (behind right side of radiator)
• Splice pack jx201 (near accelerator pedal position sensor)
• Tan
• Underhood fuse block (right front of engine compt)
• X130
• X204