A4 Sedan L4-2.0L Turbo (BPG) (2005)
display.
If indication jumps to approx. 140.0 degrees C:
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End diagnosis and switch ignition off.
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Replace Engine Coolant Temperature (ECT) Sensor G62.
CAUTION:
-
Cooling system is under pressure.
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Danger of scalding when opening.
If indication remains at approx. -40.0 degrees C:
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Check the wiring for a short circuit to Battery positive (+) or an open circuit.
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If necessary, repair the wiring connection.
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End diagnosis and switch ignition off.
Testing if display approx. 140.0 degrees C:
Testing if display approx. -40.0 degrees C:
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Disconnect the electrical harness connector - 1 - from the Engine Coolant Temperature (ECT) Sensor G62.
If indication jumps to approx. -40.0 degrees C:
-
End diagnosis and switch ignition off.
-
Replace Engine Coolant Temperature (ECT) Sensor G62.
CAUTION:
-
Cooling system is under pressure.
-
Danger of scalding when opening.
-
End diagnosis and switch ignition off.
If indication remains at approx. 140.0 degrees C:
Checking wiring
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Connect the Test Box 105 Pin VAG1598/42 to the wiring harness of the Engine Control Module (ECM) J623. The ECM is not connected.
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Using the Test Box 105 Pin VAG1598/42 and Multimeter V.A.G 1526 A or equivalent, check the following wiring connection for an open circuit.
Terminal
Test box socket
1
10
2
14