Operation CHARM: Car repair manuals for everyone.

General Information





Component Location





General Description

The Camshaft Position Sensor (CMPS) is a sensor that detects the position of a cam. The CMPS consists of a hall type sensor and a target wheel on the end of the cam. As the target wheel passes the sensor it will produce a high / low signal of 0 to 5 volts. The ECM uses this signal to detect the engine position relative to TDC #1 cylinder which allows the ECM to synchronize the firing of sequential fuel injectors. The CMPS can also be used to control CVVT.

DTC Description

Checking output signals from CMP during engine running, if the expected number of cam tooth count is not observed, ECM sets P0366.

DTC Detecting Condition





Diagnostic Circuit Diagram





Signal Waveform & Data




Fig 1) Normal waveform of IN-CMPS & EX-CMPS at idle.