A6 Quattro Wagon V6-3.0L (AVK) (2002)
1
Engine ground
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Operate starter briefly.
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LED should illuminate.
If the LED does not illuminate:
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Check wiring from terminal 1 on connector via fuse to fuel pump relay for an open circuit.
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Repair open circuit if necessary.
If LED lights up:
Checking activation
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Connect voltage tester VAG 1527 B between terminals 1 and 2.
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Initiate Output Diagnostic Test Mode (DTM) and activate intake manifold change-over valve. See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/Output Diagnostic Test Mode (DTM) (Function 03)
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LED should flash.
If the LED lamp does not flash or if it illuminates continuously:
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Connect test box VAG 1598/31 to wiring harness for engine control module; engine control module must not be connected. See: Computers and
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/Scan Tool Connecting and Initial Checks/Wiring
and Component Testing Using VAG1598/31 Test Box
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Check for open circuit and short to positive or Ground in following wiring connections:
Connector
Test box VAG 1598/31
terminal
Socket
2
48
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Repair any open/short circuit as necessary.
If no wiring malfunction is detected:
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Replace engine control module.