The deviation of the camshaft position from the target point is evaluated during stable driving condition. The PCM/ECM accumulates this deviation for a certain period and sets DTC P0014 when the accumulated deviation is too high. The target camshaft position is predetermined value depending on engine speed and throttle angle in the PCM/ECM.
Item | Detecting Condition | Possible Cause | |
DTC Strategy | Case1 |
•
Deviation check between actual CAM position and CAM setpoint position in case of changing setpoint (slow response of actuator) | 1. Oil leak 2. Oil Control Valve 3. CVVT Assembly |
Case2 |
•
Deviation check between actual CAM position and CAM setpoint position (steady deviation) | ||
Enable Conditions | Case1 |
•
CVVT control active
•
Camshaft setpoint moving by more than 12°CRK within less than 0.70 sec.
•
Camshaft setpoint moved more than 5 times since engine start
•
11V < Battery voltage < 16V
•
600 to 1500< Engine speed(RPM) < 5000
•
No relevant failure
•
20℃(68℉) < Engine oil temp. < 110℃(230℉) | |
Case2 |
•
CVVT control active
•
Camshaft setpoint moved more than 5 times since engine start
•
Camshaft setpoint not close to full retard position
•
11V < Battery voltage < 16V
•
600 to 1500 < Engine speed(RPM) < 5000
•
No relevant failure
•
20℃(68℉) < Engine oil temp. < 110℃(230℉) | ||
Threshold Value | Case1 |
•
CAM position movement < 3.4 °CRK within 0.8 sec. (with CAM setpoint moving by 12 °CRK) | |
Case2 |
•
Integral of Camshaft position actual value - Camshaft position setpoint > 45°CRK/sec. | ||
Diagnostic Time | Case1 |
•
600 seconds | |
Case2 |
•
180 seconds | ||
MIL On Condition |
•
2 Drive Cycles | ||
