A6 Sedan V6-2.8L (AHA) (1998)
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Check wiring between ECM/test box and 5-pin connector for continuity and/or short circuit per wiring diagram.
- Connector terminal 3 to ECM/test box socket 71
- Connector terminal 4 to ECM/test box socket 78
- Connector terminal 5 to ECM/test box socket 70
If wiring is OK:
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Replace Motronic ECM -J220-.
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Carry out adaptation of throttle valve control module to ECM.
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Check readiness code.
If Diagnostic Trouble Code (DTC) memory has been erased, or ECM has been disconnected, generate new readiness code.
Checking ground for power output stage
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Disconnect 5-pin connector from ignition coils.
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Connect VAG 1527 LED voltage tester between B+ and terminal 2 (ground) of connector.
LED in tester must light up.
If LED does not light up:
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Check wires for open circuit per wiring diagram.
Checking voltage supply of ignition coils
Test requirement
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Fuse for ignition coils OK
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Disconnect 5-pin connector from ignition coils.
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Switch ignition ON.