Jetta V6-2.8L (AFP) (1999)
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Check signal and Ground (GND) wires.
Testing signal and Ground (GND) wires for Mass Air Flow (MAF) sensor
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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.
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Check wiring between test box and 5-pin harness connector for open circuit according to wiring diagram.
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Terminal -5- + socket 29
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Terminal -4- + socket 53
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Terminal -3- + socket 27
Wire resistance: max. 1.5 ohms
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Additionally, check all wires for short circuit to one another.
Specified value: infinity ohms
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Check wiring additionally for short circuit to battery positive (B+)/Ground (GND).
If no malfunction is found in the wiring:
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Replace Mass Air Flow (MAF) sensor -G70- item 4. Refer under "Fuel Delivery and Air Induction/Air Cleaner Housing", See: Air Cleaner
Housing/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.