The Camshaft Position Sensor (CMPS) is a sensor that detects the compression TDC of the NO. 1 cylinder. The CMPS consists of a hall type sensor and a target on the end of the intake camshaft. When the target triggers the sensor, the sensor voltage is 5V. If not, the sensor voltage is 0V. These CMPS signal is sent to the ECM and the ECM uses the CMPS signal for synchronizing the firing of sequential fuel injectors.
If signal input phase is abnormal, ECM sets DTC P0345.
Item
Detecting Condition
Possible Cause
DTC Strategy
Check if CAM sensor is synchronized correctly
Poor connection
Open in harness
CMPS(B2-Intake)
ECM
Enable Conditions
Reference mark found
No CKP sensor error
No 1 tooth off error
Threshold value
Abnormal phase edges (High or Low)
( No signal counter > 4 times )
Diagnosis Time
Continuous
MIL On Condition
2 driving cycles
Fig.1) Normal waveform of CKPS & IN-CMPS Bank 2 at idle.