A3 L4-2.0L Turbo (BPY) (2006)
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Switch off ignition.
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Connect Test Box V.A.G 1598/42 to wiring harness with adapter cable V.A.G 1598/39- 2. Clamp test box Ground (GND) clip to battery negative
terminal. The procedure will indicate whether the engine control module is to be connected to the test box or not.
CAUTION: To avoid damaging electronic components, set measuring range before connecting test leads and observe all test
requirements.
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Check the following wire connection for open circuit and short circuit to Ground (GND) and B+:
Harness connector Terminal
V.A.G 1598/42 Bushing
- 1
- 40
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Repair wiring open circuit or short circuit according to wiring diagram.
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Install Leak Detection Pump (LDP) V144.
If no malfunction is found, but leak diagnosis pump is not functional during output diagnostic test mode:
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Replace engine control module (ECM) and observe procedures for after re-connecting engine control module (ECM).