Camshaft Position Sensor (CMPS) is a hall sensor and detects the camshaft position by using a hall element. It is related with Crankshaft Position Sensor (CKPS) and detects the piston position of the each cylinder which the CKPS can’t detect. The CMPS are installed on engine head cover and uses a target wheel installed on the camshaft. This sensor has a hall-effect IC which output voltage changes when magnetic field is made on the IC with current flow. When teeth on the target wheel trigger the sensor, output voltage is 12V. If not, it is 0V. These CMPS signal is sent to the PCM and it uses CMPS signals for determining the ignition timing with CKPS signals. CMPS makes Sequential Injection possible.
If the signal input is low with no phase edge over 12 times, PCM sets DTC P0342.
Item
Detecting Condition
Possible Cause
DTC Strategy
? Signal check
? Poor connection
? Short to ground in signal circuit
? CMPS
? PCM
Enable Conditions
? Sensor signal requested
Threshold Value
? Signal low and no phase edge > 12 times
Diagnostic Time
MIL ON Condition
? 2 driving cycle