Control Module HVAC

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


NOTE: Multi-pin connection D is not used.


28-pin multi-connector -A- (-T28a/-)







1 - X contact
2 - A/C Pressure Switch - F129- pin 1 (diagnosis 2/32 bar) and A/C Cut-Out Thermal Switch - F163- pin 46
3 - A/C Evaporator Temperature Switch -E33- and A/C Pressure Switch - F129- pin 2
4 - A/C Pressure Switch -F129- pin 3 (diagnosis 16 bar)
5 - Illumination Voltage 58d
6 - Data Link Connector (DLC) K-wire
9 - Central Flap Motor Position Sensor -G112- pin T5b/2, Footwell/Defrost Flap Motor Position Sensor -G114- pin T5a/2 and Temperature Regulator Flap Motor Position Sensor -G92- pin T5/2
10 - Central Air Flap Motor V70- pin T5b/3, Footwell/Defroster Flap Motor - V85- and Temperature Regulator Flap Motor -V68- pin T5/3
13 - Sunlight Photo Sensor -G107- pin T3a/3
14 - Sunlight Photo Sensor -G107- pin T3a/2; A/C Engine Coolant Temperature (ECT) Sensor -G110- pin 1; Front Vent Temperature Sensor -G152- pin 1 and Outside Air Temperature Sensor -G117- pin 1
15 - Automatic transmission kick down
16 - Control module for fresh air blower -J126- pin T3/2 and Fresh Air Blower V2-
17 - Relay for Climatronic -J254- and Fresh Air Blower -V2-
18 - Control module for fresh air blower -J126- pin T3/1
19 - Central Air Flap Motor - V70- pin T5b/4
20 - Central Air Flap Motor - V70- pin T5b/5
21 - Footwell/Defroster Flap Motor - V85- pin T5a/4
22 - Footwell/Defroster Flap Motor - V85- pin T5a/5
24 - Central Flap Motor Position Sensor -G107- pin T5b/1
25 - Relay for Climatronic -J254-
26 - Footwell/Defrost Flap Motor Position Sensor -G114- pin T5a/1
28 - Sunlight Photo Sensor -G107- pin T3a/1

28-pin multi-connector -B- (-T28/b-)

2 - Temperature Regulator Flap Motor -V68- pin T5/5
3 - Rear Evaporator Temperature Sensor -G153- pin 2 and Rear Heater Core Temperature Sensor -G154- pin 1
4 - Fan Relay -J323- pin 2 and Rear Evaporator Fan -V20- pin 1
5 - Control Module for Blower for Evaporator -J349- pin 2 and Rear Evaporator Fan -V20- pin 2
7 - Temperature Regulator Flap Motor -V68- pin T5/4
8 - Temperature Regulator Flap Motor Position Sensor -G92- pin T5/1
10 - Hall sender Ground
11 - Fan Relay -J323- pin 6
12 - Coolant Fan Control (FC) Relay -J26- pin T4a/ 1 and Coolant Fan Control (FC) Thermal Switch -F18- pin 1/1
13 - Terminal 30 and Relay for Climatronic -J254-
14 - A/C Evaporator Temperature Switch -E33-
15 - Rear Evaporator Temperature Sensor -G153- pin 1
16 - A/C Engine Coolant Temperature (ECT) Sensor -G110- pin 2
17 - Rear Heater Core Temperature Sensor -G154- pin 2
18 - Control Module for Blower for Evaporator -J349- pin 1 E33-
19 - Fan Relay -J323- pin 4 and Rear Warm Air Fan -V47- pin 1
20 - Control module for warm air blower -J350- pin 1 and Rear Warm Air Fan -V47- pin 2
21 - Control module for warm air blower -J350- pin 3
22 - Outside Air Temperature Sensor -G17- pin 2
23 - Front Vent Temperature Sensor -G152- pin 2
25 - Terminal 58b
26 - Vacuum Valve Rail -N53- pin T5d/4 behind instrument panel
27 - Vacuum Valve Rail -N53- pin T5d/5 behind instrument panel
28 - Hall sender via radio pin T8/1

5-pin multi-connector -C- (-T5e/-)

1 - Terminal 31 (Ground)
2 - Terminal 15 for refrigerant circulation solenoid valve -N43- pin 1 ; coolant cut-off valve two-way valve -N147- pin 1 and additional heat exchanger valve -N172- pin 1
3 - Coolant circulation pump -V50- pin 2 and thermo-switch for coolant circulation run-on -F95- pin 1
4 - Additional heat exchanger valve -N172- pin 2
5 - Refrigerant circulation solenoid valve -N43- pin 2