Wiring Diagram AUDI A4 CABRIOLET 2009 - Earth points - earth connections
| 33 | Earth point, behind dash panel, right |
| 86 | Earth connection -1-, in rear wiring harness |
| 109 | Earth connection, in airbag wiring harness |
| 277 | Earth connection -3-, in interior wiring harness |
| 312 | Earth connection -2-, in airbag wiring harness |
| 637 | Earth point, airbag control unit |
| 662 | Earth point, rear left side panel |
Wiring Diagram AUDI A4 CABRIOLET 2009 - Airbag control unit - airbag igniters - belt tensioner igniters
| D | Ignition/starter switch |
| F138 | Airbag coil connector, return spring with slip ring |
| J234 | Airbag control unit |
| J527 | Steering column electronics control unit |
| N95 | Airbag igniter, driver's side |
| N131 | Airbag igniter 1, front passenger's side |
| N153 | Belt tensioner igniter -1-, driver's side |
| N154 | Belt tensioner igniter -2-, front passenger's side |
| T2a | 2-pin connector, yellow-blue, vehicle interior, on driver's seat |
| T2b | 2-pin connector, yellow-blue, vehicle interior, on front passenger's seat |
| T4e | 4-pin connector, yellow, on steering column electronics control unit |
| T4f | 4-pin connector, yellow, connector point: vehicle interior, near glove box |
| 109 | Earth connection, in airbag wiring harness |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| Short circuit bridge becomes effective when connector is unplugged. |
Wiring Diagram AUDI A4 CABRIOLET 2009 - Belt switches - airbag deactivation key switch (front passenger’s side)
| E24 | Belt switch, driver's side |
| E25 | Belt switch, front passenger's side |
| E26 | Glove box light switch |
| E224 | Airbag deactivation key switch, front passenger's side |
| F140 | Switch: Front left belt |
| J234 | Airbag control unit |
| J393 | Convenience system central control unit |
| K145 | Airbag deactivated warning lamp, front passenger's side |
| T8b | 8-pin connector, black, belt switch, driver's side |
| T8c | 8-pin connector, black, belt switch, front passenger's side |
| T12d | 12-pin connector, brown, glove box |
| W6 | Glove box light |
| 86 | Earth connection -1-, in rear wiring harness |
| 109 | Earth connection in airbag wiring harness |
| 277 | Earth connection -3-, in interior wiring harness |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A194 | Positive (+) connection (convenience system), in main wiring harness |
| * | Only applies to models with airbag deactivation key switch |
Wiring Diagram AUDI A4 CABRIOLET 2009 - Side airbag crash sensors - side airbag igniters
| G179 | Side airbag crash sensor, driver's side |
| G180 | Side airbag crash sensor, front passenger's side |
| J220 | Motronic control unit |
| J234 | Airbag control unit |
| J393 | Convenience system central control unit |
| J526 | Telephone, telematics control unit |
| N199 | Side airbag igniter, driver's side |
| N200 | Side airbag igniter, front passenger's side |
| T3c | 3-pin connector, yellow, vehicle interior, near driver's seat |
| T3d | 3-pin connector, yellow, vehicle interior, near front passenger's seat |
| T17d | 17-pin connector, red, connector point, electronics box, plenum chamber |
| T46 | 46-pin connector, on telephone/telematics control unit |
| 109 | Earth connection in airbag wiring harness |
| 312 | Earth connection 2, in airbag wiring harness |
| A125 | Connection (crash signal), in dash panel wiring harness |
| Short circuit bridge becomes effective when connector is unplugged. | |
| * | Only applies to models with telematics |
Wiring Diagram AUDI A4 CABRIOLET 2009 - Rear belt tensioner igniters - roll-over bar solenoids
| J234 | Airbag control unit |
| N196 | Rear belt tensioner igniter, driver's side |
| N197 | Rear belt tensioner igniter, front passenger's side |
| N309 | Roll-over bar solenoid, driver's side |
| N310 | Roll-over bar solenoid, front passenger's side |
Wiring Diagram AUDI A4 CABRIOLET 2009 - Front airbag crash sensors - control unit with display in dash panel insert
| G283 | Front airbag crash sensor, driver's side |
| G284 | Front airbag crash sensor, front passenger's side |
| H3 | Buzzer/gong |
| J234 | Airbag control unit |
| J285 | Control unit with display in dash panel insert |
| K75 | Airbag warning lamp |
| T16 | 16-pin connector, black, diagnostic connector |
| T17a | 17-pin connector, red, connector point, A pillar, left |
| T17c | 17-pin connector, red, connector point, A pillar, right |
| T32a | 32-pin connector, green, on dash panel insert |
| 109 | Earth connection, in airbag 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 |
AUDI A4 CABRIOLET 2009
AUDI A4 CABRIOLET 2009 Overview of earth points
| Overview of earth points |
| 1 - | Earth point, lower part of right A-pillar -43- |
| q | Location → page 801/9 |
| 2 - | Earth point, on right behind dash panel -33- |
| q | Location → page 801/8 |
| 3 - | Earth point (audio), under centre console, front -610- |
| q | Location → page 801/10 |
| 4 - | Earth point, on left behind dash panel insert -32- |
| q | Location → page 801/8 |
| 5 - | Earth point, airbag control unit -637- |
| q | on centre tunnel |
| 6 - | Earth point, rear right side panel -663- |
| q | behind side trim on rear right |
| 7 - | Earth point, on convertible roof box -661- |
| q | on right in luggage compartment |
| Audi Cabriolet | Fitting Locations | No. 801 / 2 |
| 8 - | Earth point, on right in rear lid -53- |
| q | on right in rear lid, behind the trim |
| 9 - | Earth point, centre on rear lid -612- |
| q | centre on rear lid, behind the trim |
| 10 - | Earth point, on left in rear lid -52- |
| q | on left in rear lid, behind the trim |
| 11 - | Earth point, on left in luggage compartment -50- |
| q | Location → page 801/11 |
| 12 - | Earth point, rear left side panel -662- |
| q | behind side trim on rear left |
| 13 - | Earth point, near convenience system central control unit -49- |
| q | Location → page 801/10 |
| 14 - | Earth point, lower part of left A-pillar -44- |
| q | Location → page 801/9 |
| Audi Cabriolet | Fitting Locations | No. 801 / 3 |
| 15 - | Earth point, on left in engine compartment -12- |
| q | not for 2,0 l engine FSI, not for 2,5 l engine TDI, location → page 801/4 |
| q | only for 2.0 l FSI motor, location → page 801/5 |
| q | only for 2,5 l engine TDI, location → page 801/5 |
| 15 - | Earth point, near coil -19- |
| q | Location → page 801/6 |
| 15 - | Earth point, on front apron -26- |
| q | Location → page 801/6 |
| 16 - | Earth strap, engine - body -3- |
| q | between engine and right longitudinal member |
| 17 - | Earth point, in battery box -11- |
| q | Location → page 801/4 |
| 17 - | Earth point, starter battery -624- |
| q | Location → page 801/7 |
| Audi Cabriolet | Fitting Locations | No. 801 / 4 |
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| Audi Cabriolet | Fitting Locations | No. 801 / 5 |
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| Audi Cabriolet | Fitting Locations | No. 801 / 6 |
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| Audi Cabriolet | Fitting Locations | No. 801 / 7 |
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| Audi Cabriolet | Fitting Locations | No. 801 / 8 |
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| Audi Cabriolet | Fitting Locations | No. 801 / 9 |
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| Audi Cabriolet | Fitting Locations | No. 801 / 10 |
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| Audi Cabriolet | Fitting Locations | No. 801 / 11 |
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