Jetta GLX Wagon V6-2.8L (AFP) (2001)
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Disconnect 5-pin harness connector from Mass Air Flow (MAF) sensor -G70- with Intake Air Temperature (IAT) sensor -G42- (arrow).
If display jumps to approx. -40.0 °C:
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Press -> button.
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Press buttons -0- and -6- to select "End Output" function 06 and press -Q- button to confirm input.
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Switch ignition off.
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Replace Mass Air Flow (MAF) sensor -G70-, item 4. Refer under "Fuel Delivery and Air Induction/Fuel Injector", See: Fuel Delivery and Air
Induction/Service and Repair
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Check DTC memory. If necessary, repair any malfunctions and erase DTC memory.
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Display readiness code.
If DTC memory has been erased or the Engine Control Module (ECM) was disconnected from permanent battery (B+) voltage, the readiness code
must be generated again.
If display remains at approx. -40.0 °C:
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Press -> button.
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Press buttons -0- and -6- to select "End Output" function 06 and press -Q- button to confirm input.
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Switch ignition off.
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Check wiring according to wiring diagram.
Checking wiring
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Remove wiper arms and plenum chamber cover.
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Connect VAG1598/31 test box to Engine Control Module (ECM) wiring harness. Engine Control Module (ECM) is not connected by this action.