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 P0340.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Check if CAM sensor is synchronized correctly |
•
Poor connection
•
Open in harness
•
CMPS(B1-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 > 2 times ) | |
Diagnosis Time |
•
Continuous | |
MIL On Condition |
•
2 driving cycle |
Fig 1) Normal waveform of CKPS & IN-CMPS Bank 1 at idle.
