Wire Connections, Checking

WARNING: This page is about a different car, the 2006 Audi A8, 2005 Audi A8, and 2004 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Connecting Test Box V.A.G 1598/31 To Connector On Wiring Harness

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Connect test box VAG1598/31 to harness connectors of wiring harness (do not connect ECM). Connect Ground (GND) clip at test box (not visible in illustration) to Ground (GND) → Wire and Component Test at Engine Control Module using VAG 1598/31 .

Fig 2: Identifying 3-Pin Connector Terminals 1 & 3

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check the following wire connection for open circuit and short circuit to Ground (GND) and B+:

Harness connector Terminal	Test box VAG1598/31 Socket
2	25
1	80

Repair open circuit in wiring or short circuit if necessary. → Electrical Wiring Diagrams, Troubleshooting and Component Locations
In addition, check both wires to each other for short circuit.

Specified value: ∞ Ω (no continuity)

If no malfunction was detected during the previous tests, replace Engine Control Module (ECM) → Engine Control Module, Replacing .
Read readiness code → Readiness Code, Reading . If DTC memory was erased, readiness code must be generated again → Readiness Code, Generating .