Passat Wagon L4-1781cc 1.8L DOHC Turbo (ATW) (2000)
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Check wires between test box and 4-pin connector for open circuits according to wiring diagram.
Terminal 4 + socket 93
Terminal 3 + socket 108
Wire resistance: max: 1.5 Ohms
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Also check wires for short circuit to each other.
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Also check wires for short circuits to B+ or Ground (GND).
If no malfunctions are found in wires:
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Measure resistance at Engine Coolant Temperature (ECT) sensor -G62-, terminals C (Ground -GND-) and D (signal).
Range A shows the resistance values for the temperature range from 0-50 °C, and range B shows the values for the temperature range from 50-100 °C.