RS 4 Quattro Cabriolet V8-4.2L (BNS) (2008)
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Disconnect the Throttle Valve Control Module J338 electrical harness connector - 1 -.
Checking internal resistance
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Using a multimeter , check the Throttle Drive (for Electronic Power Control (EPC)) G186 at the Throttle Valve Control Module J338 terminals 3
to 5 for resistance.
Specified value: 1.0 to 5.0 Ohms (at 20 degrees C)
If the specified value was not obtained:
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Replace the Throttle Valve Control Module J338.
If the specified value was obtained:
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Using a Multimeter , check the Throttle Valve Control Module J338 electrical harness connector terminals 2 to 6 for voltage.
Specified value: at least 4.5 V
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Switch the ignition off.
If the specified value was obtained:
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Replace the Throttle Valve Control Module J338.
If the specified value was not 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.