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 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 PCM identifies which cylinder is at top dead center.
If CKPS cannot find reference mark 2 or more times during starting , P0335 is set .
Item
Detecting Condition
Possible Cause
DTC Strategy
Check reference wave during cranking
Poor connection
Open in harness
CKP sensor
PCM
Enable Conditions
IG "ON", Cranking or engine-off during driving
No DTC related to CAM
Camshaft position sensor state change
Threshold value
No signal counter > 6 times.
Diagnosis Time
Continuous
MIL On Condition
2 Driving Cycles
Fig.1) Normal waveform of CKPS & IN-CMPS Bank 1 at idle.