A8 Quattro Sedan V8-4.2L (BVJ) (2008)
Start diagnosis
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Disconnect the Camshaft Position (CMP) Sensor 4 (G301) electrical harness connector - 6 -.
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Switch the ignition on.
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Using a Multimeter, Check the Camshaft Position (CMP) Sensor 4 (G301) electrical harness connector terminals 1 to 3 for voltage.
Specified value: about 5.0 V
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Switch the ignition off.
If the specification was not obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following step.
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Install the test box.
If the manufacturers test box is not being used. Perform the following step.
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Remove the Motronic Engine Control Module (ECM) (J623). Refer to => [ Engine Control Module, Removing and Installing ] See: Powertrain
Management/Computers and Control Systems/Engine Control Module/Service and Repair.
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Using a Multimeter, Check the Camshaft Position (CMP) Sensor 4 (G301) electrical harness connector to the Motronic Engine Control Module
(ECM) (J623) electrical harness connector T94 for an open circuit.