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 | ● Check Crankshaft Signal Switching | ● Contact resistance in connectors ● Damage to the connecting flange/flywheel ● Misadjust crankshaft and camshaft pulley position ● Defective CKP sensor | |
Case1) | Enable Conditions | ● Before Synchronization | |
Threshold Value | ● Valid Crankshaft Teeth not yet detected with Camshaft Signal ● Can not detect TDC with valid Crankshaft Teeth and Camshaft Signal | ||
Diagnosis Time | ● 4 revolutions | ||
Case2) | Enable Conditions | ● After Synchronization | |
Threshold Value | ● Number of Crankshaft Teeth is not correct | ||
Diagnosis Time | ● 5 revolutions | ||
Fail Safe | ● TDC is determined by Camshaft signal ● Engine speed is limited to 3000rpm | ||
