AUDI A3 2003 — CAN bus wires . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A3 2003 - High bus and low bus in dash panel wiring harness

J217	Automatic gearbox control unit
J220	Motronic control unit
J248	Diesel direct injection system control unit
J361	Simos control unit
T10	10-pin connector, white, in plenum chamber
A121	Connection (high bus), in dash panel wiring harness
A122	Connection (low bus), in dash panel wiring harness
*	Only applies to 5-speed automatic gearbox and engines with engine code AUQ, from November 2001 onwards: applicable for engine code AUM
**	Only applies to 4-speed automatic gearbox and engines with engine codes APG / AUM, as of November 2001 no longer fitted
***	Only applies to 5-speed automatic gearbox and engines with engine codes ATD, ASZ
****	Only applies to 4-speed automatic gearbox and engines with engine codes AVU, BFQ

Wiring Diagram AUDI A3 2003 - High bus and low bus - convenience CAN bus in dash panel wiring harness

G85	Steering angle sender
J104	ABS with EDL control unit
J492	Four-wheel drive control unit
R	Radio
R36	Telephone transmitter and receiver unit
T8f	8-pin connector, black, on four-wheel drive control unit
T20a	20-pin connector, black, on radio
T46	46-pin connector, on telephone/telematics control unit
A121	Connection (high bus), in dash panel wiring harness
A122	Connection (low bus), in dash panel wiring harness
A146	Connection (convenience CAN bus, high), in dash panel wiring harness
A147	Connection (convenience CAN bus, low), in dash panel wiring harness
*	Does not apply to models with driver information system and from model year 2002 onwards
**	Does not apply to models with driver information system and from model year 2003 onwards

Wiring Diagram AUDI A3 2003 - Auto-check system - combi-processor in dash panel insert

J189	Auto-check system
J218	Combi-processor in dash panel insert
T32a	32-pin connector, green, on dash panel insert
T32b	32-pin connector, grey, on dash panel insert
A121	Connection (high bus), in dash panel wiring harness
A122	Connection (low bus), in dash panel wiring harness
A146	Connection (convenience CAN bus, high), in dash panel wiring harness
A147	Connection (convenience CAN bus, low), in dash panel wiring harness
A178	Connection (infotainment CAN bus, high), in dash panel wiring harness
A179	Connection (infotainment CAN bus, low), in dash panel wiring harness
*	Does not apply to models with driver information system and from model year 2002 onwards

Wiring Diagram AUDI A3 2003 - Infotainment CAN bus - navigation CAN bus in dash panel wiring harness

J402	Operating electronics control unit, navigation
J415	Navigation/TV tuner
R94	Navigation interface
T12b	12-pin connector, at navigation interface
T26	26-pin connector, black, on navigation control unit
A148	Connection (navigation CAN bus, high), in dash panel wiring harness
A149	Connection (navigation CAN bus, low), in dash panel wiring harness
A178	Connection (infotainment CAN bus, high), in dash panel wiring harness
A179	Connection (infotainment CAN bus, low), in dash panel wiring harness
*	Only applies to models with radio navigation system (RNS-D)
**	Only applies to models with radio navigation system (RNS-D) and TV tuner

Wiring Diagram AUDI A3 2003 - Infotainment CAN bus in dash panel wiring harness

J401	Navigation system with CD drive control unit
J453	Multi-function steering wheel control unit
J526	Telephone/telematics control unit
R	Radio
R36	Telephone transmitter and receiver unit
T18	18-pin connector, on multi-function steering wheel control unit
T20a	20-pin connector, black, on radio
T20b	20-pin connector, black, on navigation control unit
T46	46-pin connector, on telephone/telematics control unit
A178	Connection (infotainment CAN bus, high), in dash panel wiring harness
A179	Connection (infotainment CAN bus, low), in dash panel wiring harness
*	Only applies to models with telephone