Wiring Diagram AUDI A6 2005 - Battery - heater control unit
| A | Battery |
| G18 | Temperature sensor |
| J162 | Heater control unit |
| J248 | Diesel direct injection system control unit |
| Q8 | Glow plug with flame monitor |
| S24 | Heater overheating fuse |
| S62 | Auxiliary heater fuse |
| S205 | Fuse -2- (30) |
| T2at | 2-pin connector, black, on auxiliary heater control unit |
| T6z | 6-pin connector, on auxiliary heater control unit |
| T10n | 10-pin connector, orange, connector point, electronics box, plenum chamber |
| T16a | 16-pin connector, diagnosis connection |
| T17k | 17-pin connector, red, connector point, electronics box, plenum chamber |
| T17o | 17-pin connector, white, connector point, A pillar, left |
| V6 | Combustion air blower |
| V54 | Metering pump |
| V55 | Recirculating pump |
| 1 | Earth strap, battery - body |
| 44 | Earth point, lower part of left A pillar |
| A159 | Connection (L), in dash panel wiring harness |
| L51 | Positive (+) connection -1-, in auxiliary heater wiring harness |
| * | Models with V6 TDI engine |
| ** | On electronics box, plenum chamber |
| *** | 8-cylinder engine, small cooling circuit |
Wiring Diagram AUDI A6 2005 - Control and display unit for air conditioner - solar cell isolation relay - solar roof
| C20 | Solar cells |
| E87 | Control and display unit for air conditioner |
| J126 | Fresh air blower control unit |
| J309 | Solar cell isolation relay |
| J347 | Ultra-sonic sensor control unit |
| J355 | Solar operation control unit |
| S15 | Fuse in fuse box |
| T2ds | 2-pin connector, blue, connector point, A pillar, right |
| T17 | 17-pin connector, orange, connector point, A pillar, right |
| V2 | Fresh air blower |
| 135 | Earth connection -2-, in dash panel wiring harness |
| 199 | Earth connection -3-, in dash panel wiring harness |
| A1 | Positive (+) connection (30a), in dash panel wiring harness |
| A52 | Positive (+) connection 2 (30), in dash panel wiring harness |
| L2 | Connection, in air conditioner wiring harness |
| L10 | Connection -2-, in air conditioner wiring harness |
| * | Models with solar roof |
| ** | Models without solar roof |
| *** | Models with anti-theft alarm system |
| # | Both possible |
Wiring Diagram AUDI A6 2005 - Control and display unit for air conditioner - solar cells isolation relay 2
| D | Ignition/starter switch |
| E87 | Control and display unit for air conditioner |
| J8 | Auxiliary heater relay |
| J354 | Solar cells isolation relay 2 |
| S5 | Fuse in fuse box |
| S225 | Fuse 25 in fuse box |
| S244 | Fuse 44 in fuse box |
| T17o | 17-pin connector, white, connector point, A pillar, left |
| 135 | Earth connection -2-, in dash panel wiring harness |
| 199 | Earth connection -3-, in dash panel wiring harness |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A20 | Connection (15a), in dash panel wiring harness |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| A69 | Connection (air conditioner), in dash panel wiring harness |
| A78 | Connection (30a, S244), in dash panel wiring harness |
| L4 | Connection (75a), in air conditioner wiring harness |
| * | Models with solar roof |
| ** | Models without solar roof |
| *** | Both possible |
| # | Models with internally controlled compressor |
| ## | Models with externally controlled compressor |
| ### | 8-cylinder engine, small cooling circuit |
Wiring Diagram AUDI A6 2005 - Dash panel insert - function selection switch II in centre console
| E272 | Function selection switch II, in centre console |
| J285 | Control unit with display in dash panel insert |
| T17o | 17-pin connector, white, connector point, A pillar, left |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32c | 32-pin connector, grey, on dash panel insert |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| A19 | Connection (58s), in dash panel wiring harness (switch illumination) |
| * | Auxiliary heater with radio-operated remote control |
Wiring Diagram AUDI A6 2005 - Auxiliary heating radio wave receiver - radio/telephone/auxiliary heater aerial
| E15 | Heated rear window switch |
| J526 | Telephone/telematics control unit |
| R | Radio |
| R1 | Aerial connection |
| R24 | Aerial amplifier |
| R45 | Aerial amplifier (telephone/radio) |
| R46 | Frequency divider for radio signals, radio sound system and telephone |
| R51 | Radio/telephone/auxiliary heater aerial |
| R64 | Auxiliary heating radio controlled receiver |
| T10ba | 10-pin connector, blue, connector point, A pillar, left |
| T17o | 17-pin connector, white, connector point, A pillar, left |
| Z24 | Heated rear window with window aerial |
| 44 | Earth point, lower part of left A pillar |
| 75 | Earth point, rear pillar, right |
| * | Rear window aerial |
| ** | Roof aerial |
| *** | Auxiliary heater with radio-operated remote control |
| # | 8-cylinder engine, small cooling circuit |
Wiring Diagram AUDI A6 2005 - Coolant shut-off valve relay - small cooling circuit
| C | Alternator |
| J285 | Control unit with display in dash panel insert |
| J541 | Coolant shut-off valve relay |
| N279 | Heater coolant shut-off valve |
| T2du | 2-pin connector, black, for heater coolant shut-off valve |
| T10p | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T17o | 17-pin connector, white, connector point, A pillar, left |
| T32 | 32-pin connector, blue, on dash panel insert |
| 44 | Earth point, lower part of left A pillar |
| 146 | Earth connection -1-, in auxiliary heater wiring harness |
| A17 | Connection (61), in dash panel wiring harness |
| A79 | Connection (hot light switch), in dash panel wiring harness |
| L51 | Positive (+) connection -1-, in auxiliary heater wiring harness |
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