Passat Syncro Wagon V6-2.8L (ATQ) (2000)
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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 sensor with commercially available chilling spray and watch temperature value. Temperature should 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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Pull connector (1) off Intake Air Temperature (IAT) sensor -G42- (2).
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Connect together terminals of connector using auxiliary wires from VAG 1594, 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 at 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 (see wiring diagram)
Continuation of test if indication is approx. 143°C: