The deviation of the camshaft position from the target point is evaluated during stable driving condition. The PCM 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.
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 | ||
