Crankshaft Position Sensor (CKPS): Troubleshooting: Waveform

WARNING: This page is about a different car, the 2017 Kia Forte5 and 2017 Kia Forte Koup. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Scantool Display - Crankshaft Position Sensor And Camshaft Position Sensor Waveform (1 Of 2)

Courtesy of KIA MOTORS AMERICA, INC.

Fig 2: Scantool Display - Crankshaft Position Sensor And Camshaft Position Sensor Waveform (2 Of 2)

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.