The Crankshaft Position Sensor (CKPS) is a hall effect 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 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.
The PCM sets DTC P0335 when the number of crankshaft teeth during one revolution is incorrect or crankshaft signal is missing while camshaft signal is detected.
Item
Detecting Condition
Possible Cause
DTC Strategy
Check camshaft signal switching
Open or short in signal, ground or power supply circuit
Poor connection or damaged harness
Damage to the connecting flange/flywheel
Misadjust crankshaft and camshaft pulley position
Faulty CKP sensor
Enable Conditions
6V< Battery voltage < 16V
Camshaft signal valid
Threshold Value
Case1
No crankshaft teeth during 4 camshaft signal transition
Case2
Crankshaft teeth detected but synchronization not successful
Case3
Number of Crankshaft Teeth within one revolution to high or too low
Diagnosis Time
2 revolutions
2.5 revolutions
Mil On Condition
2 Driving Cycles
Fig.1) The square wave signal should be smooth and without any distortion.
Fig.2) The CMPS falling(rising) edge is coincided with 3~5 tooth of the CKP from one longer signal(missing tooth)