A4 Quattro Cabriolet L4-2.0L Turbo (BWT) (2009)
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Using a multimeter, check the Engine Speed (RPM) Sensor (G28) terminals 2 to 3 - B - for resistance.
Specified value: 0.7 to 1000 kOhm
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Check the Engine Speed (RPM) Sensor (G28) terminals 1 to 2 and 1 to 3 for short circuits.
Specified value: infinite (infinity)
If any of the specified values are not obtained:
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Replace the Engine Speed (RPM) Sensor (G28). Refer to Fuel Injection and Ignition Repair Information.
If the specified values are 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 Engine Speed (RPM) Sensor (G28) electrical harness connector terminals to the Engine Control Module (ECM)
(J623) electrical harness connector T60 terminals for resistance.