If there is a delay or a target error between the target angle and the real angle over 5 times, the ECM/PCM sets DTC P0014.
Item | Detecting Condition | Possible Cause | |
DTC Strategy | Case1 |
•
Exhaust VVT Slow Response (Deviation between actual CAM position and CAM set-point position in case of changing set-point) | 1. Poor connection 2. Contamination of Oil / Clog of Oil path 3. OCV(Exhaust) 4. CVVT |
Case2 |
•
Exhaust VVT Steady deviation (Deviation between actual CAM position and CAM set-point position) | ||
Enable Conditions | Case1 |
•
Time after start >2sec
•
Camshaft set-point movement within less than 0.7 sec > 12°CRK
•
Camshaft set-point moved since engine start > 5times
•
600...1500 < Engine speed < 5000rpm
•
20°C < Engine Oil Temperature (model) < 120°C
•
10V < Battery voltage < 16V | |
Case2 |
•
Time after start > 2sec
•
Camshaft set-point moved to full retard position > 5times
•
Camshaft set-point not close to full retard position 3°CRK away from full retard position
•
Camshaft set-point close to full retard position (within 3°CRK from full retard position)13...23 engine revolutions passed after camshaft set-point changes. (depending on rpm/oil temp)
•
abs (CAM set-point - Actual position) > 5°CRK
•
600...1500rpm < Engine speed < 5000rpm
•
20°C < Engine Oil Temperature (model) < 120°C
•
10V < Battery voltage < 16V | ||
Threshold Value | Case1 |
•
CAM position movement < 3.4 °CRK : For error detection, the above condition should be met 5 times | |
Case2 |
•
Integral of abs(Camshaft position actual value - Camshaft position setpoint)*1 rev. time > 45°CRK*sec For error detection, the above condition should be met 5 times
•
Integral of abs(Camshaft position actual value - Camshaft position setpoint)*1 rev. time > 30°CRK*sec when actual camshaft movement is slower than camshaft setpoint movement in retard direction : For error detection, the above condition should be met 5 times | ||
Diagnostic Time |
•
Immediate | ||
MIL ON Condition |
•
2 driving cycles | ||
