Jetta L4-2.0L (AEG) (2000)
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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. -46°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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Turn off ignition.
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Replace Mass Air Flow (MAF) sensor -G70-. Refer to item 3, See: Fuel Delivery and Air Induction/Air Cleaner Housing/Service and Repair
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Check DTC memory. If necessary, repair any malfunctions and erase DTC memory.
See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading Diagnostic Trouble Codes
See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Clearing Diagnostic Trouble Codes
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Display readiness code. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If DTC memory has been erased or the Engine Control Module (ECM) was disconnected from permanent battery (B+) voltage, generate the
readiness code again. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If display remains at approx. 141°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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Turn off ignition.
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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 VAG1598/22 test box to control module wiring harness.