A4 Quattro Wagon L4-2.0L Turbo (BPG) (2005)
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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 1598/39-1 or 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, 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+:
Harness connector Terminal
Test box V.A.G 1598/42Socket
- 2 -
4-Cyl. TFSI: B 8
6-Cyl. FSI: B 24
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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 Leak Detection Pump (LDP) V144.
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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 test box V.A.G 1598/42 to wiring harness with adapter cable V.A.G 1598/39-1 or 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.