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What is the measurement method for a two-wire crankshaft position sensor?

1 Answers

Pauline

07/29/25 4:29pm

The measurement method for a two-wire crankshaft position sensor is as follows: 1. The engine speed signal comes from the crankshaft position sensor. If the sensor does not output a signal, the engine tachometer will not move. 2. Connect the two probes of a multimeter to the two signal wires of the crankshaft position sensor. Set the multimeter to the 20V range at idle speed. A higher measured voltage indicates a higher engine speed. 3. Adjust the oscilloscope voltage to 14V and the time to 10ms, then start the vehicle to observe the AC signal waveform. 4. Use a diagnostic scanner to read the engine speed data stream. The functions of the crankshaft position sensor include: 1. Detecting engine speed; 2. Detecting the top dead center position of the pistons; 3. Detecting and controlling the top dead center signals for each cylinder's ignition.

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