A4 Sedan V6-3.2L (BKH) (2007)
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Repair wiring open circuit or short circuit according to wiring diagram.
If no malfunction is found, but leak diagnosis pump is not functional during output diagnostic test mode:
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Replace the Leak Detection Pump (LDP) (V144)Refer to => [ Leak Detection Pump ] See: Service and Repair.
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Observe procedures for after re-connecting engine control module (ECM).
Checking input wiring
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Switch off ignition.
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Connect Adapter Cable, 121-Pin (V.A.G 1598/31 ) (test box) to wiring harness connectors, do not connect engine control module. Connect
Ground (GND) clip at test box to Ground (GND) (not visible in illustration).
CAUTION!
To avoid damaging electronic components, switch to the corresponding measuring range and observe all test conditions before connecting
the test leads.
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Check the following wire connection for open circuit and short circuit to Ground (GND) and B+: