Checking input wiring
- Switch off ignition.
Fig 1: Connecting 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
- 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.
- 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 - | 4-cyl. TFSI: B 48 |
| 6-cyl. FSI: B 24 | |
| 8-cyl. FSI - Audi RS4: B 40 |
- Repair wiring open circuit or short circuit according to wiring diagram.
- Observe procedures for after re-connecting engine control module (ECM) →
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