A6 Quattro Wagon V6-3.0L (AVK) (2002)
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Check for open circuit and short to positive or short to ground in following wiring connections:
Connector
Test box VAG 1598/31
terminal
Socket
3
108
4 (signal)
93
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Check for short circuits between two wires.
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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.