| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | E | Voltage supply, terminal 15 | Fuse F20 |
| | | |
| 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 |
| | | |
| 6 | | Not used | |
| | | |
| 7 | A | Relay control | Rear defogger relay |
| | | |
| 8 | A | Signal Heated washer jets | Connector, 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 | E | Pressure signal | High pressure switch |
| | | |
| 11 | | Not used | |
| | | |
| 12 | | Not used | |
| | | |
| 13 | | Not used | |
| | | |
| 14 | | Not used | |
| | | |
| 15 | A | A/C system standby signal | DDE control module |
| | | |
| 16 | A | Signal, A/C compressor ON (M51) | DDE control module |
| | | |
| 17 | A | Signal, A/C compressor OFF (M51) A/C compressor signal | DDE control module Digital diesel electronics control unit Engine control module (DME) |
| | | |
| 18 | E | Auxiliary fan normal speed relay control | Connector, auxiliary fan stage 1 |
| | | |
| 19 | | Not used | |
| | | |
| 20 | M | Ground High pressure switch | High pressure switch |
| | | |
| 21 | A | Power High pressure switch | High pressure switch |
| | | |
| 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 | Park heating ON signal Relay control Relay for latent heat accumulator | Independent park/auxiliary heating Relay for latent heat accumulator |
| | | |
| 2 | A | Park heating ON signal Valve control Changeover valve LWS | Park heating relay Solenoid valve 2 park heating/ventilation Changeover valve LWS |
| | | |
| 3 | A | Park heating ON feedback signal | Independent park/auxiliary heating |
| | | |
| 4 | A | Sensor signal | NTC resistor, steering angle sensor |
| | | |
| 5 | M | Sensor ground | NTC resistor, steering angle sensor |
| | | |
| 6 | A | Valve control Shutoff valve LWS | Shutoff valve LWS |
| | | |