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 Crankshaft Signal Switching | ● Open or short in signal, ground or power supply circuit ● Contact resistance in connectors ● Damage to the connecting flange/flywheel ● Misadjust crankshaft and camshaft pulley position ● Faulty CKP sensor |
Enable Conditions | ● Camshaft position sensor signal is valid ● 6V＜ Battery voltage ＜ 16V | |
Case 1 | Threshold Value | ● No Crankshaft Teeth detected after 4 Camshaft signal transitions ● Crankshaft teeth detected but synchronization is not successful |
Diagnosis Time | ● 2 revolutions | |
Case2 | Threshold Value | ● Number of Crankshaft Teeth is not correct |
Diagnosis Time | ● 2.5 revolutions |
