AIR CONDITIONING

(a4: left side of center tunnel) g687
10a
12a
3.2l
A/c compressor regulator valve (a4: rear of a/c compressor)
A/c pressure/ temperature sensor (a4: left side of condenser)
Air flow flap motor
Brake light switch (s4: top of brake pedal assembly)
Center outlet temperature sensor
Center vent adjustment motor
Climatronic control module
Computer data lines system
Coolant pump
Coolant pump (if equipped)
Defroster door motor (a4: left side of a/c unit)
Driver's side fuse panel (a4: behind left end of dash)
Evaporator vent temperature sensor (a4: in evaporator housing)
Except 3.2l
Footwell flap motor
Footwell outlet temperature sensor
Fuse 10a
Fuse 40a
Fuse 5a
Fuse carrier
G638 (a4: behind right kick panel)
G639 (a4: behind left kick panel)
Hot at all times
Info not available
Nca
Outside air temperature sensor (a4: behind front grille)
Passenger's side fuse panel (a4: behind right end of dash)
Recirculation door motor (a4: left side of air intake housing)
Red
Sunlight photo sensor (a4: under center of dash)
T16b
T16i
T17i
T20e
T32b
Temperature regulator flap motor
Vehicle electrical system control module (a4: under left side of dash) (s4: behind driver's storage compt)

(m/t) (a/t)
11a
2.ol
3.2l
After run coolant pump (a4: lower left side of engine)
Auxiliary engine coolant pump relay (3.2l) coolant circulation pump relay (2.0l) (2.0l a4: on e-box relay/fuse carrier) (2.0l s4: in e-box in plenum chamber)
Battery jump start terminal (a4: middle of engine compt plenum chamber)
Climatronic refrigerant shut-off valve (a4: on refrigerant tube)
Computer data lines system
Coolant fan
Coolant fan 2 (a/t)
Coolant fan control (fc) module (s4: at radiator fan)
Driver's side fuse panel (a4: behind left end of dash)
E box relay/ fuse carrier (a4: in plenum chamber electronics box)
Engine control module (ecm) (a4: left side of engine compt plenum chamber) (s4: in e-box, in plenum chamber)
Engine coolant level (ecl) sensor
Engine coolant temperature (ect) sensor (a4/2.0l: lower left rear of engine) (a4/3.2l: top front of engine) (s4: rear of engine)
Fresh air blower (a4: under right side of air intake housing)
Fresh air blower control module (a4: lower right side of air intake housing) (s4: integral to fresh air blower motor)
Fuse 1 40a 60a
Fuse 15a
Fuse 5a
Fuse carrier
G12 (left rear of engine compt)
G671 (a4: on left front long member)
G687 (a4: left side of center tunnel)
Hot at all times
Instrument cluster control module
Nca
Power distribution system
Recirculation pump relay (3.2l)
Red
T32b
T32f
T60
T94

(behind front grille) outside air temperature sensor
12a
A/c pressure/ temperature sensor (a4: left side of condenser)
Air quality sensor (a4: bottom of hvac unit)
Automatic day/ night interior mirror
Computer data lines system
Driver's side fuse panel (a4: behind left end of dash)
Evaporator vent temperature sensor (in evaporator housing)
Fresh air blower (a4: under right side of air intake housing)
Fresh air blower control module (a4: lower right side of air intake housing) (s4: integral to fresh air blower motor)
Fuse 5a
Fuse carrier
G639 (a4: behind left kick panel)
G687 (a4: left side of center tunnel)
Humidity sensor
Left footwell vent temperature sensor
Left front upper body outlet temperature sensor (a4: left end of dash)
Mirrors system
Nca
Right footwell vent temperature sensor
Right front upper body outlet temperature sensor (a4: right end of dash)
T16b
T17i
T32b
T8c
Vehicle electrical system control module (a4: under left side of dash) (s4: behind driver's storage compt)

(m/t) (a/t)
11a
2.ol
3.2l
A/c compressor regulator valve (a4: rear of a/c compressor)
After run coolant pump (a4: lower left side of engine)
Battery jump start terminal (a4: middle of engine compt plenum chamber)
Climatronic refrigerant shut-off valve (a4: on refrigerant tube)
Coolant circulation pump relay (2.0l) (a4: on e-box relay/fuse carrier) (s4: in e-box in plenum chamber) auxiliary engine coolant pump relay (3.2l)
Coolant fan
Coolant fan 2 (a/t)
Coolant fan control (fc) module (s4: at radiator fan)
Driver's side fuse panel (a4: behind left end of dash)
E-box relay/ fuse carrier (a4: in plenum chamber electronics box)
Engine control module (ecm) (a4: left side of engine compt plenum chamber) (s4: in e-box, in plenum chamber)
Engine coolant level (ecl) sensor
Engine coolant temperature (ect) sensor (2.0l a4: lower left rear of engine) (3.2l a4: top front of engine) (s4: rear of engine)
Fuse 1 40a 60a
Fuse 15a
Fuse 5a
Fuse carrier
G12 (left rear of engine compt)
G671 (a4: on left front long member)
Hot at all times
Power distribution system
Recirculation pump relay (3.2l)
Red
T32b
T60
T94

AIR CONDITIONING – Audi A4 2009 – SYSTEM WIRING DIAGRAMS