Q7 Quattro V8-4.2L (BAR) (2008)
Checking internal resistance
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Using a Multimeter, check the Knock Sensor terminals 1 to 2 for an internal short.
Specified value: infinite (Infinity).
If the specified value was not obtained:
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Replace the Knock Sensor.
If the specified value was 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, Replacing ] See: Computers and Control
Systems/Engine Control Module/Service and Repair/Engine Control Module, Replacing.
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Using a Multimeter, Check the Knock Sensor electrical harness connector to the Motronic Engine Control Module (ECM) (J623) electrical
harness connector T60 for an open circuit.