1. CMPS
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 5V. If not, it is 0V. These CMP signal is sent to the ECM and used for determining the ignition timing along with CKP signal. CMPS makes Sequential Injection possible.
Checking oputput signals from CMP during engine running, if the expected number of cam tooth count is not observed, ECM sets P0365.
Item
Detecting Condition
Possible Cause
DTC Strategy
Signal check
Poor connection
Abnormal assembling state
CMPS
Enable Conditions
No CKP sensor error
Gap of CKP sensor wheel detected
Threshold Value
Unplausible signal counter > 10 times
Diagnostic Time
Continuous
MIL ON Condition
2 driving cycle
Fig.1) Normal waveform of IN-CMPS & Ex-CMPS at idle.