Golf GL L4-2.0L (AZG) (2001)
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Disconnect 5-pin connector from Mass Air Flow (MAF) sensor -G70- with Intake Air Temperature (IAT) sensor -G42- (arrow).
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Bridge terminals 1 + 3 of connector using adapter cables from VAG1594 connector test kit, and observe what is indicated on display.
If indication jumps to approx. 140°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).
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Check DTC memory, repair any malfunctions and then erase DTC memory.
See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Clearing Diagnostic Trouble Codes
See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading Diagnostic Trouble Codes
If indication remains approx. -40°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. 140°C: