RS 4 Quattro Cabriolet V8-4.2L (BNS) (2008)
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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 3 (G198) or Knock Sensor 4 (G199). 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) 2 (J624 ). Refer to => [ Engine Control Module 1, Removing and Installing ] See: Computers and
Control Systems/Engine Control Module/Service and Repair/Engine Control Module 1, Removing and Installing.
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Using a Multimeter, Check the Knock Sensor electrical harness connector to the Engine Control Module (ECM) 2 (J624) electrical harness
connector T60a for an open circuit.