| 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 | A | Right water valve control | Water valve assembly, Right valve |
| | | |
| 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 | E | Signal input | Automatic air recirculation sensor |
| | | |
| 13 | A | Voltage control | Automatic air recirculation sensor |
| | | |
| 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 | E | Signal input | Automatic air recirculation sensor |
| | | |
| 26 | A | Voltage control | Automatic air recirculation sensor |
| | | |
| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | A | Control voltage Blower control | Output stage, rear compartment blower |
| | | |
| 2 | E | Blower control voltage | Rear compartment blower |
| | | |
| 3 | | Not used | |
| | | |
| 4 | A | Sensor signal | LH heat exchanger temperature sensor |
| | | |
| 5 | A | Sensor signal | RH heat exchanger temperature sensor |
| | | |
| 6 | A | Sensor signal | Evaporator temperature sensor |
| | | |
| 7 | A | Signal Final stage unit | Final stage unit |
| | | |
| 8 | E | Signal Stratification adjuster, rear compartment | Rear compartment blower |
| | | |
| 9 | M | Sensor ground | Evaporator temperature sensor |
| | | |
| 10 | | Not used | |
| | | |
| 11 | | Not used | |
| | | |
| 12 | | Not used | |
| | | |
| 13 | E | Actuating signal Fresh air flap motor | Fresh air flap motor |
| | | |
| 14 | A | Actuating signal Fresh air flap motor | Fresh air flap motor |
| | | |
| 15 | A | Actuating signal Fresh air flap motor | Fresh air flap motor |
| | | |
| 16 | E | Actuating signal Fresh air flap motor | Fresh air flap motor |
| | | |
| 17 | A | Component power Stratification adjuster, rear compartment | Rear compartment blower |
| | | |
| 18 | | Not used | |
| | | |