Passat L4-1.8L Turbo (AWM) (2004)
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Remove Intake Air Temperature (IAT) sensor. Plug connector back in.
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Make note of Intake Air Temperature (IAT) value in display field 4.
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Spray the sensor with commercially available chilling spray and watch the temperature value. The temperature value must decrease.
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Press -> button.
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Press buttons -0- and -6- to select "End Output" function 06. Press -Q- button to confirm input.
Continuation of test if indication is approx. -48 °C:
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Disconnect connector -1- from Intake Air Temperature (IAT) sensor -G42- -2-.
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Bridge terminals of connector using adapter cables from VAG 1594 connector test kit, and observe what is indicated on display.
If indication jumps to approx. 143 °C:
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Press -> button.
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Press buttons -0- and -6- to select "End Output" function 06. Press -Q- button to confirm input.
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Switch ignition off.
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Replace Intake Air Temperature (IAT) sensor (G42).
If indication remains approx. -48 °C:
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Press -> button.
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Press buttons -0- and -6- to select "End Output" function 06. Press -Q- button to confirm input.
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Switch ignition off.
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Check wires according to wiring diagram
Continuation of test if indication is approx. 143 °C: