Wiring Diagram AUDI A4 CABRIOLET 2003 - Voltage supply - starter inhibitor and reversing light relay
| B | Starter |
| D | Ignition/starter switch |
| J217 | Automatic gearbox control unit |
| J226 | Starter inhibitor and reversing light relay |
| M16 | Reversing light bulb, left |
| M17 | Reversing light bulb, right |
| S5 | Fuse in fuse box/relay plate |
| S231 | Fuse in fuse box |
| T1 | Single connector, black, engine compartment, right |
| T10a | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T17d | 17-pin connector, red, connector point, electronics box, plenum chamber |
| 12 | Earth point, in engine compartment, left |
| 83 | Earth connection -1-, in front right wiring harness |
| 501 | Screw connection -2- (30), on relay plate |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| A70 | Connection (15a, fuse 231), in dash panel wiring harness |
| A87 | Connection (RF (reversing light)), in dash panel wiring harness |
| D51 | Positive (+) connection -1- (15), in engine compartment wiring harness |
| * | Only applies to models with engine codes AVJ, BFB (in engine compartment, left) |
Wiring Diagram AUDI A4 CABRIOLET 2003 - Automatic gearbox control unit - Tiptronic switch
| E1 | Lighting switch |
| F189 | Tiptronic switch |
| J... | Engine management system relay (see applicable engine Current Flow Diagram) |
| J60 | Automatic gearbox relay |
| J217 | Automatic gearbox control unit |
| N110 | Selector lever lock solenoid |
| S286 | Automatic gearbox fuse (for ATF pump run-on) |
| T10j | 10-pin connector, black, on Tiptronic switch |
| T17e | 17-pin connector, white, connector point, electronics box, plenum chamber |
| 83 | Earth connection -1-, in front right wiring harness |
| 238 | Earth connection -1-, in interior wiring harness |
| 500 | Screw connection -1- (30), on relay plate |
| A3 | Positive (+) connection (58), in dash panel wiring harness |
| A74 | Connection (15a, fuse 5), in dash panel wiring harness |
| D50 | Positive (+) connection (30), in engine compartment wiring harness |
| D173 | Connection (87), in engine prewiring wiring harness |
| * | Does not apply to models with engine code BDV |
| ** | Only applies to models with engine code BDV |
Wiring Diagram AUDI A4 CABRIOLET 2003 - Automatic gearbox control unit - dash panel insert
| J217 | Automatic gearbox control unit |
| J220 | Motronic control unit |
| J248 | Diesel direct injection system control unit |
| J285 | Control unit with display in dash panel insert |
| T10 | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T10a | 10-pin connector, brown, connector point, electronics box, plenum chamber |
| T16 | 16-pin connector, black, diagnostic connector |
| T17d | 17-pin connector, red, connector point, electronics box, plenum chamber |
| T32a | 32-pin connector, green, on dash panel insert |
| A19 | Connection (58d), in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| D159 | Connection (high bus), in engine compartment wiring harness |
| D160 | Connection (low bus), in engine compartment wiring harness |
| * | Only applies to models with diesel engine |
| ** | Only applies to models with petrol engine |
AUDI A4 CABRIOLET 2003 Control units overview
| 1 - | Heated windscreen control unit -J505- |
| q | Location → page 804/4 |
| 2 - | CD changer -R41- |
| q | Location → page 804/12 |
| 3 - | Fresh air blower control unit -J126- |
| q | Location → page 804/7 |
| 4 - | Headlight range control, control unit -J431- |
| q | Location → page 804/7 |
| 5 - | Radio -R- |
| q | not for navigation system |
| q | Location → page 804/10 |
| 5 - | Navigation operating electronics control unit -J402- |
| q | for navigation system RNS-D only |
| q | Location → page 804/10 |
| 5 - | Control unit with display for radio and navigation system -J503- |
| q | for navigation system RNS-Low only |
| q | Location → page 804/12 |
| Audi Cabriolet | Fitting Locations | No. 804 / 2 |
| 5 - | Navigation system with CD drive control unit -J401- |
| q | Location for navigation system NS-Low → page 804/11 |
| q | Location for navigation system RNS-E → page 804/11 |
| 6 - | Front passenger side door control unit -J387- |
| q | Location → page 804/14 |
| 7 - | Steering column electronics control unit -J527- |
| q | Location → page 804/8 |
| 8 - | Control unit in dash panel insert -J285- |
| q | Location → page 804/8 |
| 9 - | Telephone and telematics control unit, telematics -J526- |
| q | Location → page 804/13 |
| 10 - | Airbag control unit -J234- |
| q | Location → page 804/9 |
| 11 - | Driver door control unit -J386- |
| q | Location → page 804/14 |
| 12 - | Convenience system central control unit -J393- |
| q | Location → page 804/13 |
| Audi Cabriolet | Fitting Locations | No. 804 / 3 |
| 13 - | Onboard power supply control unit -J519- |
| q | Location → page 804/9 |
| 14 - | Motronic control unit -J220- |
| 14 - | Diesel direct injection system control unit -J248- |
| q | Location → page 804/4 |
| 15 - | Automatic gearbox control unit -J217- |
| q | not for models with multitronic® |
| q | Location → page 804/5 |
| 16 - | ABS control unit -J104- |
| q | Location → page 804/6 |
| 17 - | Automatic gearbox control unit -J217- |
| q | for models with multitronic® only |
| q | Location → page 804/5 |
| 18 - | Radiator fan control unit -J293- |
| q | Location → page 804/6 |
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| Audi Cabriolet | Fitting Locations | No. 804 / 14 |
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