| Number | X-pin, colour | Description |
|---|---|---|
| X642 | 2-pin, Black | Plug connector Independent park/auxiliary heating |
| X764 | 6-pin, Black | Plug connector Independent park/auxiliary heating |
| X01011 | 2-pin, Black | Plug connector Flame monitor |
| X01012 | 2-pin, Black | Plug connector Circulation pump motor |
| X01013 | 2-pin, Black | Plug connector Combustion-air blower motor |
| X01014 | 2-pin, Black | Plug connector Heater plug |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Terminal 30 | Fuse F47 |
| 2 | M | Ground | Ground point |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Signal, independent heating ON | Receiver, independent heating M57 Heating and A/C control module |
| 2 | E/A | Diagnostic signal TXD X183 | Connector, TXD X183 |
| 3 | Not used | ||
| 4 | E | Telestart signal | Heating and A/C control module |
| 5 | Not used | ||
| 6 | A | Supply Metering pump (independent heating) | Metering pump (independent heating) |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | A | Supply Flame monitor | Flame monitor |
| 2 | E | Signal Flame monitor | Flame monitor |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | A | Supply Circulation pump motor | Circulation pump motor |
| 2 | M | Ground Circulation pump motor | Circulation pump motor |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | A | Supply Combustion-air blower motor | Combustion-air blower motor |
| 2 | M | Ground Combustion-air blower motor | Combustion-air blower motor |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | A | Supply Heater plug | Heater plug |
| 2 | M | Ground Heater plug | Heater plug |