Control Module HVAC

Climatronic Control Module -J255-, Multi-Pin Connector Assignments







12-pin multi-connector -A- (black -T12/-)
1. Data Link Connector (DLC) K-wire
2. Motronic Engine Control Module -J220- (idle speed control)
3. A/C readiness
4. Open
5. Terminal 58d (instrument illumination - dimmer)
7. Fresh air intake duct temperature sensor -G89-
8. Outside air temperature sensor -G17-
9. Ground signal (sensors - motors)
10. Open
11. Engine Coolant Temperature (ECT) warning lamp (where applicable*)
12. Ground signal (sensors - motors)
*)Confirm using applicable wiring diagram

20-pin multi-connector housing -B- (red -T20/-)
1. Outside temperature signal from instrument cluster (where applicable*)
2. CAN Bus - high (where applicable*)
3. CAN Bus - low (where applicable*)
4. CAN Bus - shielding (where applicable*)
5. Sender for outlet temperature, floor outlet -G192-
6. Sender for outlet temperature, center -G191-
7. Evaporator vent temperature sensor -G263-
8. Temperature regulator flap motor position sensor -G92-
9. Central flap motor position sensor -G112-
10. Footwell/Defrost flap motor position sensor -G114-
13. Standing time - instrument cluster (where applicable*)
14. Temperature increase off/PTC off (P/N 3B1/2 907 044 F only - where applicable*)
15. Engine Coolant Shutoff Two-Way Vacuum Valve Relay -J585- (where applicable*)
17. Back pressure flap motor position sensor -G113-
18. Sunlight photo sensor -G107-
*)Confirm using applicable wiring diagram

16-pin multi-connector housing -C- (brown -T16b/-)
1. Kickdown (where applicable*)
2. A/C pressure switch -F129- pin 2 (diagnosis 2/32 bar - high pressure side)
3. Compressor voltage (where applicable*)
4. Speedometer signal (where applicable*)
5. Open
6. Engine Speed (RPM) signal (where applicable*)
7. Terminal 58 (instrument illumination) (where applicable*)
8. Reference voltage 5V (10 mA) for flap motors
9. Fresh air blower control signal (-)
10. 11 - Open
12. Motronic Engine Control Module (ECM) (engine electronics - bi-directional)
13. Open
14. Fresh air blower control signal (+)
15. Wiring control (internal)
16. Control module for fresh air blower -J126-
*)Confirm using applicable wiring diagram

16-pin multi- connector -D- (black -T16a/-)
1. Open
2. Temperature regulator flap motor -V68-
3. Footwell/Defroster flap -V85-
4. Central air flap motor -V70-
5. Air flow flap motor -V71 -
6. A/C Clutch relay -J44- or A/C Compressor Regulator Valve -N280- (where applicable*)
7. Terminal 30 (where applicable*)
8. A/C Clutch relay -J44- (where applicable*)
9. Terminal 15
10. Temperature regulator flap motor -V68-
11. Footwell/Defroster flap motor -V85-
12. Central air flap motor -V70-
13. Air flow flap motor -V71 -
14. Terminal 31 (Ground - where applicable*)
15. Terminal 31 (Ground)
16. Coolant (FC) Fan Control Control Module -J293- or First Speed Engine Coolant Fan Control (FC) relay -J279- (where applicable**)
*) Confirm using applicable wiring diagram
**) Engine dependant - confirm using applicable wiring diagram