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. 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. The PCM calculates engine RPM by using the sensor’ s signal and controls the injection duration and the ignition timing. The engine will stop if the signals from the sensor to the PCM are lost.
This DTC is set if there is no change of signal.
Item
Detecting Condition
Possible Cause
DTC Strategy
? Patterns of the signalcombinations of the crank angle sensor signal are monitored every 2 sec. Continuously
? Poor connection
? Open or short in CKPS circuit
? Faulty CKPS
? Faulty PCM
Enable Conditions
? Cranking switch "ON"
Threshold value
? ?Vcrank = 0
Diagnostic Time
? Continuous
MIL ON condition
? 2 driving cycles
Fig1) The given data is the normal waveform of the Crankshaft Position Sensor(CKPS) and Camshaft Position Sensor(CMPS) at idle. The PCM controls the injection timing and the ignition timing by using these signals. Generally CKPS signal is used to detect the piston’s position and CMPS signal is used to detect the Top Dead Center of each cylinder.