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 CMP signal is sent to the PCM and used for determining the ignition timing along with CKP signal. CMPS makes Sequential Injection possible.
If signal input phase is abnormal over 12 times , PCM sets DTC P0340.
Item
Detecting Condition
Possible Cause
DTC Strategy
? Signal check (check the assembling state)
? Poor connection
? abnormal assembling state
? CMPS
? PCM
Enable Conditions
? Sensor signal requested
Threshold Value
? Abnormal phase edges > 12 times
Diagnostic Time
MIL ON Condition
? 2 driving cycle