Jetta GLX Wagon V6-2.8L (AFP) (2001)
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Disconnect 2-pin connector from motor -arrow-.
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Connect VAG 1527B diode test lamp to disconnected attachment plug using auxiliary cables from VAG 1594.
The LED should illuminate.
If the LED illuminates (power supply OK):
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Turn off ignition.
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Replace air pump motor (V101).
If the LED does not illuminate:
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Clip on 2-terminal attachment plug.
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Start control element diagnosis and trigger air pump relay -J299-.
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Check DTC memory.
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Read-out readiness code.
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If fault memory was erased or engine control unit was separated from positive voltage supply, readiness code must be regenerated.