| Number | X-pin, colour | Description |
|---|---|---|
| X10054 | 18-pin, blue | Plug connector Heating and A/C control module |
| X611 | 12-pin, natural | Plug connector Heating and A/C control module |
| X613 | 3-pin, natural | Plug connector Heating and A/C control module |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | M | Ground | Ground connector |
| 2 | E/A | K-bus signal line | K-bus connector |
| 3 | E | Pressure signal | High pressure switch |
| 4 | M | Ground High pressure switch | High pressure switch |
| 5 | A | Supply High pressure switch 5 V stabilized | High pressure switch |
| 6 | E | Night light signal | Connector, terminal 58g |
| 7 | Not used | ||
| 8 | Not used | ||
| 9 | Not used | ||
| 10 | E | Voltage supply, terminal 15 | Fuse F19 |
| 11 | E | Signal, switch off consumer load | Connector, switch off consumer load |
| 12 | Not used | ||
| 13 | M | Blower control, stage 4/defrost | Relay, defrost |
| 14 | A | Relay activation Rear defogger relay | Rear defogger relay |
| 15 | A | Auxiliary water pump activation | Auxiliary water pump |
| 16 | A | Activation, water valve | Water valves |
| 17 | Not used | ||
| 18 | E | Voltage supply, terminal 30 for throttle actuator | Fuse F6 |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | Not used | ||
| 2 | Not used | ||
| 3 | Not used | ||
| 4 | A | Sensor signal Evaporator sensor | Evaporator sensor |
| 5 | E | Sensor ground Evaporator sensor | Evaporator sensor |
| 6 | E | Signal, blower switch stage 0 (blower OFF) | Blower switch |
| 7 | E | Actuating signal Fresh air flap motor | Fresh air flap motor |
| 8 | A | Actuating signal Fresh air flap motor | Fresh air flap motor |
| 9 | A | Actuating signal Fresh air flap motor | Fresh air flap motor |
| 10 | E | Actuating signal Fresh air flap motor | Fresh air flap motor |
| 11 | Not used | ||
| 12 | Not used | ||
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | A | Positive activation | Footwell/rear compartment actuator motor |
| 2 | M | Ground, actuator motors | Footwell/rear compartment actuator motor |
| 3 | E/A | MI-bus | Footwell/rear compartment actuator motor |