A Crankshaft Position Sensor (CKPS) is a magnetic type sensor that generates voltage using a sensor and a target wheel mounted on the crankshaft; there are 58 slots in the target wheel where one is longer than the others. When the slot in the wheel aligns with the sensor, the sensor voltage outputs low. When the metal (tooth) in the wheel aligns with the sensor, the sensor voltage outputs high. During one crankshaft rotation there are 58 rectangular signals and one longer signal. The ECM/PCM calculates engine RPM by using the sensor’ s signal and controls the injection duration and the ignition timing. Using the signal differences caused by the longer slot, the ECM/PCM identifies which cylinder is at top dead center.
If CKPS cannot find reference mark 60 or more times after starting, P0336 is set.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
CKP signal unplausible | 1. Poor connection 2. Open or short in signal circuit 3. CKPS |
Enable Conditions |
•
- | |
Threshold Value |
•
Unplausible signal counter > 60 times | |
Diagnostic Time |
•
Continuous | |
MIL ON Condition |
•
3 driving cycle |
① There are 60 signals of CKPS(Including missing tooth) during the semi-cycle of CMPS #1.
② There are 3~5 signals of CKPS between the switching point of CMPS #1 and the missing tooth of CKPS.
