A3 Quattro V6-3.2L (BUB) (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 faulty Knock Sensor (KS) 1 (G61)/Knock Sensor (KS) 2 (G66).
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) ( J220). Refer to => [ Motronic Engine Control Module, Replacing ] See: Powertrain
Management/Computers and Control Systems/Description and Operation/Motronic Engine Control Module.
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Using a Multimeter, Check the Knock Sensor electrical harness connector to the Motronic Engine Control Module (ECM) (J220) electrical
harness connector T121 for an open circuit.