A4 Mk2
Note
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| 1 - | Auxiliary heater wiring harness |
| q | Different versions for horizontal and vertical installation |
| q | The illustration shows the version for vertical installation |
| 2 - | Heater overheating fuse -S24- |
| 3 - | Connection for earth stud at auxiliary heater |
| 4 - | Flame monitor -G64- |
| 5 - | Connector to combustion air blower -V6- |
| 6 - | Temperature sensor -G18- |
| 7 - | Connector to circulation pump -V55- |
| 8 - | Connector to glow plug for heater -Q9- |
| 9 - | 12-pin connector (to auxiliary heater) |
| q | Contact “1” |
| – | Positive via heater overheating fuse -S24- |
| q | Contact “2” |
| – | Positive to heater overheating fuse -S24- |
| q | Contact “3” |
| – | Earth connection to flame monitor -G64- |
| q | Contact “4” |
| – | Positive connection to flame monitor -G64- |
| q | Contact “5” |
| – | Positive connection to glow plug for heater -Q9- |
| q | Contact “6” |
| – | Earth connection to combustion air blower -V6- |
| q | Contact “7” |
| – | Earth connection to temperature sensor -G18- |
| q | Contact “8” |
| – | Earth connection for circulation pump -V55- |
| q | Contact “9” |
| – | Positive connection to temperature sensor -G18- |
| q | Contact “10” |
| – | Glow plug for heater -Q9- (via earth stud at auxiliary heater housing) |
| q | Contact “11” |
| – | Positive connection to combustion air blower -V6- |
| q | Contact “12” |
| – | Positive connection for circulation pump -V55- |
| 10 - | Auxiliary heater control unit -J364- |
| q | Different versions for auxiliary heaters for petrol and diesel → Parts List |
| q | Ensure correct connection of the two connectors (to auxiliary heater and to vehicle electrical system) |
| q | In auxiliary heating mode, the metering pump -V54- is actuated with full voltage by the auxiliary heater control unit -J364- up to control unit part number index “B”. For control units as of part number index “C” (gradual introduction as of Model Year 2005), the voltage for the actuation signal of the metering pump -V54- will be limited in auxiliary heating mode to 9.2 V with the petrol version and 9.8 V with the diesel version, thus reducing the operating noise of the metering pump -V54-. |
