The Crankshaft Position Sensor (CKPS) is a magnetic field sensitive 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.
Checking tooth error correction under detecting condition, if the TEC is out of Threshold value, PCM sets P0315.
Item | Detecting Condition | Possible cause |
DTC Strategy | ● This DTC indicates that crankwheel tooth error has not been learned. | ● CKPS ● Target wheel ● PCM |
Enable Conditions | ● 12 ≤ Ignition Voltage ≤16(V) ● 10 ≤ Engine load< 90(%) ● 1500 ≤ engine speed ≤ 4000(rpm) ● Vehicle speed < 5kph (3.106856 mph) ● Tec RPM stability timer >10sec ● 0°C(32°F) < Coolant temp < 110°C(230°F) ● Not active disabling faults ● Not key on disabling faults | |
Threshold Value | ● Distance driven without learning tooth error ≥ 4000km(2485.484769 mile) or ● Maximum allowed number of tooth error correction samples taken in the On The Road(OTR)learning mode< 250 or ● Sum of tooth error factors variation outside calibratable range ≥ 250 | |
Diagnosis Time | ● Continuous | |
MIL On Condition | ● 1 driving cycle |
