A8 Quattro Sedan V8-4.2L (BGK) (2006)
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Operate starter briefly.
Specified value: approx. battery voltage
‹› Ground (GND) from the ECM is present at terminal 3 of connector.
If specified value is not obtained, check wire connections.
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Connect multimeter to terminal 3 and terminal 4 of connector for voltage measurement.
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Switch ignition on.
Specified value: approx. 5 Volts.
If specified value is not obtained, check wire connections.
Wire Connections, Checking
‹› Signal wire is also checked during wire test.
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Connect test box (VAG1598/31) to wiring harness of Engine Control Module (ECM), refer to Repair Manual.