A4 Sedan V6-2.8L (AFC) (1996)
If wiring is OK:
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Connect Fluke 83 multimeter between test box socket B2 and vehicle Ground (GND).
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Switch ignition on.
Specified value: min. 4.0 volts
If the specified value is not obtained:
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Replace ECM.
If the specified value is obtained:
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Replace Camshaft Position (CMP) sensor.