| Number | X-pin, color | Description |
|---|---|---|
| X610 | 26-pin, blue | Connector 3 Heating and A/C control module |
| X611 | 12-pin, natural | Connector 4 Heating and A/C control module |
| X18153 | 6-pin, black | Connector 5 Heating and A/C control module |
| X18341 | 3-pin, black | Connector 0 Heating and A/C control module |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Voltage supply, terminal 15 | Fuse F34 |
| 2 | Not used | ||
| 3 | E/A | K-bus signal line | K-bus splice |
| 4 | E | Consumer cut-off signal | Consumer cut-off splice |
| 5 | A | Left water valve control | Water valve assembly, Left valve |
| 6 | Not used | ||
| 7 | A | Relay control Rear defogger relay | Rear defogger relay |
| 8 | A | Power Heated washer jets | Heated washer jets |
| 9 | A | Auxiliary water pump control with park heating Auxiliary water pump control with latent heat accumulator | Auxiliary water pump with park heating Connector, auxiliary water pump with latent heat accumulator |
| 10 | A | Activation Pressure sensor | B8 High pressure switch |
| 11 | Not used | ||
| 12 | Not used | ||
| 13 | Not used | ||
| 14 | Not used | ||
| 15 | Not used | ||
| 16 | Not used | ||
| 17 | E | A/C compressor relay signal | Engine control module (DME) DDE control module |
| 18 | Not used | ||
| 19 | Not used | ||
| 20 | E | Signal Pressure sensor | Pressure sensor |
| 21 | A | Sensor voltage supply 5 V stabilized | Pressure sensor |
| 22 | Not used | ||
| 23 | E | Nighttime illumination signal | Terminal 58g splice |
| 24 | Not used | ||
| 25 | Not used | ||
| 26 | Not used | ||
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | A | Sensor signal | LH heat exchanger temperature sensor |
| 2 | A | Sensor signal | RH heat exchanger temperature sensor |
| 3 | A | Sensor signal | Evaporator temperature sensor |
| 4 | A | Signal Final stage unit | Final stage unit |
| 5 | Not used | ||
| 6 | E | Sensor signal | Sensor connector |
| 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 | Not used | ||
| 2 | A | Independent park heating check valve | Solenoid valve 2 park heating/ventilation |
| 3 | Not used | ||
| 4 | Not used | ||
| 5 | Not used | ||
| 6 | Not used | ||
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Throttle actuator terminal 30 voltage supply | Fuse F48 |
| 2 | A | Magnetic clutch voltage supply | Y2 A/C compressor |
| 3 | M | Ground | Ground point |