Beetle L4-2.0L (AEG) (2000)
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Disconnect 5-pin harness connector -1- from Mass Air Flow sensor -2-.
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Check wiring for open circuit between Test Box and 5-pin harness connector -1- using Wiring diagram.
Terminal 1 + socket 40
Terminal 3 + socket 12
Wire resistance: max. 1.5 Ohms
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Check wiring for short circuit to Battery +.
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Specification: Infinity Ohms
If wiring OK:
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Measure resistance at Intake Air Temperature sensor G42 terminals 1 (signal) and 3 (Ground).