S4 V8-4.2L (BHF) (2004)
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Disconnect electrical harness connector -2-.
Checking voltage supply
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Switch ignition on.
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Connect multimeter for voltage measurement as follows.
Harness connector
Specified value
Terminal
1+ Ground (GND)
about 5 V
1 + 5
about 5 V
2 + Ground (GND)
about 5 V
2 + 3
about 5 V
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Switch ignition off.
If specified values are not obtained:
Checking wire connections
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Connect test box to wiring harness of Engine Control Module (ECM), ECM is not connected. See: Testing and Inspection/Reading and Clearing
Diagnostic Trouble Codes/Scan Tool Connecting/Test Box, Connecting For Wiring and Component Test