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. 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.
Checking reference signals from CKPS under detecting condition, if any signal is detected for more than 0.15 sec., ECM sets P0335.
MIL(Malfunction Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving cycle.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Check reference wave during cranking | 1. Poor connection 2. Open in harness 3. CKP sensor 4. ECM |
Enable Conditions |
•
IG "ON", Cranking or engine-off during driving
•
No DTC related to CAM
•
Camshaft position sensor state change | |
Threshold value |
•
No reference signal over 0.15 sec. | |
Diagnosis Time |
•
0.15 sec. | |
MIL On Condition |
•
2 Driving Cycles |
Item | Specification |
Coil Resistance (Ω) | 630 ~ 770Ω (20℃) |
Airgap (mm) | 0.5 ~ 1.5 mm |
Fig.1) Normal waveforms of CKPS & CMPS
