Beetle L4-1781cc 1.8L Turbo (APH) (1999)
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Check wire between test box and 2-pin connector for open circuit according to wiring diagram.
Terminal 2 + socket 39
Wire resistance: max. 1.5 ohms
Vehicles with 4-pin clutch vacuum vent valve switch
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Check wire between test box and 4-pin connector for open circuit according to wiring diagram.
Terminal 3 + socket 39
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 detected in the wires and the resistance values are OK:
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Replace Motronic Engine Control Module (ECM) -J220-.