A Crankshaft Position Sensor (CKPS) is a magnetic type sensor that generates voltage using a sensor and a target wheel mounted on the crankshaft. The ECM 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 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 sets DTC P0016.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Camshaft and crankshaft alignment check |
•
Poor connection
•
Contamination of Oil / Clog of Oil path
•
CKPS, CMPS
•
OCV
•
CVVT | |
Case1 | Enable Conditions |
•
Reference position adaptation requsted by external tester connected | |
Threshold Value |
•
|Difference between adapted Reference position and design specification | ＞15°CA | ||
Diagnostic Time |
•
2 sec | ||
Case2 | Enable Conditions |
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Target valve timing = Reference valve timing, for more than 2 sec
•
No electrical error of OCV
•
Reference position adaptation completed
•
No CMP sensor error & No CKP sensor error | |
Threshold Value |
•
| Average difference between Adapted reference position and currently measured position | ＞15°CA | ||
Diagnostic Time |
•
2.6 sec | ||
MIL On Condition |
•
DTC only | ||
This example shows a typical Crankshaft Position Sensor(CkPS) waveform at idle. The ECM controls the injection and ignition timing by using these signals.
