S4 Quattro Wagon V8-4.2L (BHF) (2008)
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Disconnect the Engine Coolant Temperature (ECT) Sensor G62 electrical harness connector - 1 -.
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Using a jumper wire , connect the Engine Coolant Temperature (ECT) Sensor G62 electrical harness connector terminals 3 to 4.
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Check the value indicated on the scan tool display.
If the value jumps to approx. 140.0 degrees C
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End diagnosis and switch the ignition off.
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Replace the Engine Coolant Temperature (ECT) Sensor G622.
If indication remains at approx. -40.0 degrees C:
Testing if display approx. 140.0 degrees C:
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Disconnect the Engine Coolant Temperature (ECT) Sensor G62 electrical harness connector - 2 -.
If indication jumps to approx. -40.0 degrees C:
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End diagnosis and switch ignition off.
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Replace the Engine Coolant Temperature (ECT) Sensor G62.
If indication remains at approx. 140.0 degrees C:
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.