Beetle L4-2.0L (AEG) (2000)
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Check wires between test box and 5-pin connector for open circuit according to wiring diagram.
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Terminal 1+socket 40
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Terminal 3 + socket 12
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Wire resistance: max. 1.5 Ohms
Vehicles with engine code AVH, AZG, BDC
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Check wires between test box and 5-pin connector for open circuit according to wiring diagram.
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Terminal 1 + test box socket 26
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Terminal 3 + test box socket 27
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Wire resistance: max. 1.5 Ohms
Continuation for all vehicles
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Also check wires for short circuit to each other, to vehicle Ground (GND) and to B+. Specified value: Infinite Ohms
If no malfunctions are found in wire:
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Measure resistance at Intake Air Temperature (IAT) sensor -G42-, terminals 1 (signal) and 3 (Ground -GND-).