General Information

Component Location





General Description

The Camshaft Position Sensor (CMPS) is a sensor that detects the compression TDC of the NO. 1 cylinder. The CMPS consists of a hall type sensor and a target on the end of the intake camshaft. When the target triggers the sensor, the sensor voltage is 5V. If not, the sensor voltage is 0V. These CMPS signal is sent to the PCM and the PCM uses the CMPS signal for synchronizing the firing of sequential fuel injectors.

DTC Description

Checking output signals from CMP during engine running, if the expected number of cam tooth count is not observed, PCM sets P0346. MIL (Malfunction Indication Lamp) turns on when the malfunction lasts till con secutive 2 driving cycle.

DTC Detecting Condition





Diagnostic Circuit





Signal Waveform




Fig) Signal waveforms of CMPS #1 and #2 at idle

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.