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 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.
The ECM 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
? Signal check
? Open in signal circuit
? Open in ground circuit
? Short to ground in signal circuit (pin 34 to 15)
? Faulty CKPS
? Faulty ECM
Threshold value
? No signal during cranking > 8 times
Enable Conditions
? Phase sensor signal enabled
Diagnostic Time
? Cranking
This figure shows the waveform measured at terminal 2 of CKPS.
In section ? there are 2 missing teeth which is used as reference point in judging TDC.
The section ? is one tooth interval of 60 teeth which has an angle of 6 degree.
While inspecting signal waveform,check if there is missing teeth or lower signal than threshhold.