Jetta SportWagen L4-2.0L Turbo (CCTA) (2009)
If indication jumps to approx. -40.0° C:
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Switch ignition off.
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Replace the Engine Coolant Temperature (ECT) Sensor (G62).
If the value remains at approx. 140.0° 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) and disconnect the ECM connectors.
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Disconnect the ECT harness connector at the sensor.
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Using a multimeter, check the signal circuit of the Engine Coolant Temperature (ECT) Sensor (G62) electrical harness connector terminal 1 to
engine ground.
Specified value: OL or no continuity.
If the specified value was Not obtained:
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Check the wiring for a short circuit to Ground (GND).