Passat L4-1.8L Turbo (AWM) (2004)
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Remove Intake Air Temperature (IAT) Sensor -G42-. Plug connector back in.
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Remember the intake air temperature value.
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Spray the sensor with commercially available chilling spray while observing the temperature value. The temperature should decrease.
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End diagnosis and switch ignition off.
If the intake air temperature does not drop:
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Replace Intake Air Temperature (IAT) Sensor -G42-
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: Testing and Inspection/Scan Tool
Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data
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Generate readiness code. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
Continuation of test if indication is approx. -40 degrees C:
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Disconnect connector -1- from Intake Air Temperature (IAT) Sensor -G42- -2-.
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Bridge terminals 1 + 2 of connector using the respective adapter cables while observing the indication on display.
If indication jumps to approx. 143 degrees C:
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End diagnosis and switch ignition off.
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Replace Intake Air Temperature (IAT) Sensor -G42-
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: Testing and Inspection/Scan Tool
Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data
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Generate readiness code. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If indication remains at approx. -40 degrees C:
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End diagnosis and switch ignition off.
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Check wires according to wiring diagram.
Continuation of test if indication is approx. 143 degrees C:
