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 P0346.
DTC Detecting Condition
Diagnostic Circuit Diagram
Signal Waveform & Data
Fig 1) Normal waveform of IN-CMPS & EX-CMPS at idle.