A Crankshaft Position Sensor (CKPS) is a magnetic type sensor that generates voltage using a sensor and a target wheel mounted on the crankshaft. The PCM calculates engine RPM by using the sensor’ s signal and controls the injection duration and the ignition timing.
Camshaft Position Sensor (CMPS) is a hall sensor and detects the camshaft position by using a hall element. It is related with Crankshaft Position Sensor (CKPS) and detects the piston position of the each cylinder which the CKPS can’t detect. This CMPS signal is sent to the PCM and it uses CMPS signals for determining the ignition timing with CKPS signals. CMPS makes Sequential Injection possible.
If the deviation between CKPS and CMPS(EX-CMPS Bank 2) is bigger than the threshold value, ECM sets DTC P0019.
Item | Detecting Condition | Possible Cause | |
Case1 | DTC Strategy |
•
Camshaft install diagnosis |
•
Poor connection
•
Contamination of Oil / Clog of Oil path
•
CKPS, CMPS
•
OCV
•
CVVT |
Enable Conditions |
•
First firing detected after ECM installed or ‘Camshaft install fault exist
•
Adapted CMP - CMP < 2 Deg | ||
Threshold Value |
•
| Adapted CMP – Set value |> 7 Deg | ||
Case2 | DTC Strategy |
•
Camshaft and crankshaft alignment check | |
Enable Conditions |
•
Adapted CMP - CMP < 2 Deg
•
Engine speed < 1500rpm
•
Engine load < 50%
•
ECT > 60C | ||
Threshold Value |
•
| Adapted CMP – Set value – Adaped CMP during installdiagnosis | > 13 Deg | ||
Diagnostic Time |
•
6 camshaft rotations | ||
MIL On Condition |
•
2 driving cycle | ||
Fig.1) Normal waveform of CKPS & EX-CMPS Bank 2 at idle.
