Jetta SportWagen L4-2.0L Turbo (CCTA) (2009)
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Switch the ignition on.
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Using the scan tool, check the coolant temperature:
If indication remains at approx. -40.0° C:
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Continue test according to the following table:
If the specified value was obtained:
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Start the engine and let it run at idle.
The temperature value must increase uniformly in increments of 1.0° C.
If the engine shows problems in certain temperature ranges and if the temperature does not climb uniformly, the temperature signal is intermittent.
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Replace the the Engine Coolant Temperature (ECT) Sensor (G62).
Checking internal resistance
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Disconnect the Engine Coolant Temperature (ECT) Sensor (G62) electrical harness connector - 1 -.
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Using a multimeter, check the Engine Coolant Temperature (ECT) Sensor (G62) terminals 1 to 2 for resistance.