Engine Control Module, Checking Ground

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: Identifying 3-Pin Connector Terminals 1 & 3

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect multimeter as follows:

Electrical Harness connector Terminal	Measure to
2	B+

Operate starter briefly.

Specified value: approx. battery voltage

Switch ignition off.

If the specified values are not reached, check wire connection.