The Crankshaft Position Sensor (CKPS) is a magnetic field sensitive 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. During one crankshaft rotation there are 58 rectangular signals and one longer signal. The ECM 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 identifies which cylinder is at top dead center.
If CKPS cannot find reference mark 32 or more times after starting, P0336 is set.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
CKP signal unplausible |
•
Poor connection
•
Noise
•
Short in harness
•
Target wheel
•
ECM |
Enable Conditions |
•
IG "ON", Cranking or engine-off during driving
•
No DTC related to CAM
•
Camshaft position sensor state change | |
Threshold value |
•
Unplausible signal counter > 32 times | |
Diagnosis Time |
•
Continuous | |
MIL On Condition |
•
2 Driving Cycles |
Fig 1) Normal waveform of CKPS & IN-CMPS Bank 1 at idle.
