A6 Sedan V6-2.8L (ATQ) (2000)
If wire connection is OK:
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Replace Engine Control Module (ECM).
B - Warning lamp for On Board Diagnostic (Malfunction Indicator Lamp -MIL-) remains lit constantly
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Check DTC memory of Engine Control Module (ECM).
If no DTCs are stored:
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Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM. Refer to "Scan Tool Testing/Wire And Component Test Using
VAG1598/31 Test Box", Under "Powertrain Management", See: Powertrain Management/Computers and Control Systems/Testing and Inspection
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Remove instrument cluster.
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Check the following wire connection for short circuit to Ground (GND):
Test box VAG1598/31 Socket
Instrument cluster Terminal
47
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Repair short circuit if necessary.
If wire connection is OK:
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Replace Engine Control Module (ECM).