A4 Quattro Cabriolet L4-2.0L Turbo (BWT) (2009)
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 faulty Knock Sensor (KS) 1 (G61)/Knock Sensor (KS) 2 (G66). Refer to Fuel Injection and Ignition Repair Information.
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. Refer to Fuel Injection and Ignition Repair Information
If the manufacturers test box is not being used. Perform the following step.
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Remove the Engine Control Module (ECM) (J623). Refer to => [ Engine Control Module, Replacing ] See: Computers and Control
Systems/Engine Control Module/Service and Repair.
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Using a Multimeter, Check the Knock Sensor electrical harness connector to the Engine Control Module (ECM) (J623) electrical harness
connector T60 for resistance.