Wiring Diagram AUDI A2 2003 - Ignition/starter switch - voltage stabiliser
| A | Battery |
| D | Ignition/starter switch |
| J532 | Voltage stabiliser |
| R | Radio |
| S88 | Strip fuse |
| SB2 | Fuse -2- on fuse box |
| SB38 | Fuse -38- on fuse box |
| T8a | 8-pin connector, black, radio connector III |
| 65 | Earth point, left longitudinal member, rear, between B and C pillar |
| 279 | Earth connection -5-, in interior wiring harness |
| 500 | Screw connection -1- (30), on relay plate |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| A46 | Positive (+) connection (30 - from radio), in dash panel wiring harness |
| A98 | Positive (+) connection -4- (30), in dash panel wiring harness |
| A104 | Positive (+) connection -2- (15), in dash panel wiring harness |
| * | Does not apply to models with engine code ANY |
| ** | Only applies to models with engine code ANY |
| *** | As of model year 2003 no longer fitted (phased-in modification) |
| **** | Phased-in modification |
Wiring Diagram AUDI A2 2003 - Front loudspeakers
| R | Radio |
| R21 | Bass loudspeaker, front left |
| R23 | Bass loudspeaker, front right |
| R26 | Mid-range/treble loudspeaker, front left |
| R27 | Mid-range/treble loudspeaker, front right |
| T8 | 8-pin connector, brown, radio connector II |
| T20a | 20-pin connector, black, at A pillar, left |
| T20b | 20-pin connector, black, at A pillar, right |
Wiring Diagram AUDI A2 2003 - Passive loudspeakers - rear
| R | Radio |
| R15 | Bass loudspeaker, rear left |
| R17 | Bass loudspeaker, rear right |
| R34 | Mid-range/treble loudspeaker, rear left |
| R35 | Mid-range/treble loudspeaker, rear right |
| T8 | 8-pin connector, brown, radio connector II |
| T20c | 20-pin connector, black, at B pillar, left |
| T20d | 20-pin connector, black, at B pillar, right |
Wiring Diagram AUDI A2 2003 - Active loudspeakers - rear
| R | Radio |
| R12 | Amplifier |
| R15 | Bass loudspeaker, rear left |
| R17 | Bass loudspeaker, rear right |
| R34 | Mid-range/treble loudspeaker, rear left |
| R35 | Mid-range/treble loudspeaker, rear right |
| T20 | 20-pin connector, black, radio connector I |
| T20c | 20-pin connector, black, at B pillar, left |
| T20d | 20-pin connector, black, at B pillar, right |
| 279 | Earth connection -5-, in interior wiring harness |
Wiring Diagram AUDI A2 2003 - Bose loudspeakers - front
| R | Radio |
| R12 | Amplifier |
| R21 | Bass loudspeaker, front left |
| R23 | Bass loudspeaker, front right |
| R26 | Mid-range/treble loudspeaker, front left |
| R27 | Mid-range/treble loudspeaker, front right |
| T20 | 20-pin connector, black, radio connector I |
| T20a | 20-pin connector, black, at A pillar, left |
| T20b | 20-pin connector, black, at A pillar, right |
| 133 | Earth connection, in loudspeaker wiring harness |
| 279 | Earth connection -5-, in interior wiring harness |
| B135 | Connection -1- (15a), in interior wiring harness |
| V21 | Positive (+) connection (30), in radio - amplifier wiring harness |
Wiring Diagram AUDI A2 2003 - Bose loudspeakers - rear
| R | Radio |
| R12 | Amplifier |
| R15 | Bass loudspeaker, rear left |
| R17 | Bass loudspeaker, rear right |
| R34 | Mid-range/treble loudspeaker, rear left |
| R35 | Mid-range/treble loudspeaker, rear right |
| R100 | Bass loudspeaker |
| T20c | 20-pin connector, black, at B pillar, left |
| T20d | 20-pin connector, black, at B pillar, right |
Wiring Diagram AUDI A2 2003 - CD changer
| R | Radio |
| R41 | CD changer |
| T20 | 20-pin connector, black, radio connector I |
| V14 | Connection (screening), in CD changer wiring harness |
| * | Does not apply to models with radio Chorus |
Wiring Diagram AUDI A2 2003 - Mobile phone operating electronics control unit - telephone/telematics control unit
| J412 | Operating electronics control unit, mobile phone |
| J526 | Telephone/telematics control unit |
| R | Radio |
| T8a | 8-pin connector, black, radio connector III |
| T10d | 10-pin connector, red, radio connector IV |
| T10t | 10-pin connector, black, on telephone/telematics control unit |
| T16 | 16-pin connector, diagnostic connector, black, near fuse box |
| T18 | 18-pin connector, black, mobile phone interface, in front passenger's footwell |
| T46 | 46-pin connector, black, on telephone/telematics control unit |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| A129 | Connection (muting), in dash panel wiring harness |
| * | Only applies to models with provision for mobile phone |
| ** | Only applies to models with telephone/telematics |
Wiring Diagram AUDI A2 2003 - Control unit with display in dash panel insert
| J285 | Control unit with display in dash panel insert |
| R | Radio |
| T20 | 20-pin connector, black, radio connector I |
| T32a | 32-pin connector, green, on dash panel insert |
| T32b | 32-pin connector, grey, on dash panel insert |
| A178 | Connection (infotainment CAN bus, high), in dash panel wiring harness |
| A179 | Connection (infotainment CAN bus, low), in dash panel wiring harness |
| B229 | Connection (high bus), in interior wiring harness |
| B230 | Connection (low bus), in interior wiring harness |
| * | Only applies to models with radio Chorus |
| ** | Only applies to models with radio Concert / Symphony |
| *** | Only applies to models with driver information system |
| **** | Only applies to models without driver information system |
Wiring Diagram AUDI A2 2003 - Aerial
| E15 | Heated rear window switch |
| E87 | Control and display unit for air conditioner/Climatronic |
| J515 | Aerial selection control unit |
| R1 | Aerial connection |
| R18 | Frequency switch, left |
| R19 | Frequency switch, right |
| R24 | Aerial amplifier |
| R111 | Aerial amplifier -2- |
| R112 | Aerial amplifier -3- |
| R113 | Aerial amplifier -4- |
| Z1 | Heated rear window |
| Z24 | Heated rear window with window aerial |
| 277 | Earth connection -3-, in interior wiring harness |
| B248 | Connection -2- (heated rear window), in interior wiring harness |
| * | Only applies to models with radio Chorus |
| ** | Only applies to models with radio Concert / Symphony |
| *** | Only applies to models without air conditioner |
| **** | Only applies to models with air conditioner |
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