A Crankshaft Position Sensor (CKPS) is a hall type sensor that generates voltage using a sensor and a target wheel mounted on the crankshaft. The ECM/PCM calculates engine RPM by using the sensor’ s signal and controls the injection duration and the ignition timing.
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. This CMPS signal is sent to the ECM/PCM and it uses CMPS signals for determining the ignition timing with CKPS signals. CMPS makes Sequential Injection possible.
If the deviation between CKPS and CMPS is bigger than the threshold value, ECM/PCM sets DTC P0017.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Camshaft and crankshaft alignment check | 1. Poor connection 2. Contamination of Oil / Clog of Oil path 3. CKPS, CMPS 4. OCV 5. CVVT |
Enable Conditions |
•
- | |
Threshold Value |
•
|Difference between adapted Reference position and design specification | ＞17°CA | |
Diagnostic Time |
•
- | |
MIL ON Condition |
•
3 driving cycle |
This example shows a typical Crankshaft Position Sensor(CkPS) and Camshaft Position Sensor(CMPS) waveform at idle. The ECM/PCM controls the injection and ignition timing by using these signals.
