Crankshaft Position Sensor (CKPS): Troubleshooting: Waveform

Fig 1: Display - CKPS And CMPS Voltage Waveform

Courtesy of KIA MOTORS AMERICA, INC.

Fig 2: Display - CKPS And CMPS Voltage Waveform (At Idle)

Courtesy of KIA MOTORS AMERICA, INC.

This example shows a typical Crankshaft Position Sensor(CkPS) and Camshaft Position Sensor(CMPS) waveform at idle. The PCM controls the injection and ignition timing by using these signals.

Generally CkPS signal is used to detect the piston's position and CMPS signal is used to detect the Top Dead Center of each cylinder.