1. CVVL Sensor
CVVL (Continuously Variable Valve Lift) is a system that can change the valve lift continuously and it controls the amount of air flow by variable valve lifting. CVVL drives the valve lifts with optimization for engine RPM and improves fuel efficiency through reducing the pumping and friction loss. Also it can reduce the activation time of catalyst by improvement of response speed for acceleration.A error occurs if the large friction due to engine defects causes stuck or delayed reaction when PCM controls CVVL motor.
ECU sets P103B when there is a problem during monitoring the deviation of engine control (stuck engine or friction increasing)
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
The current CVVL value doesn't change though CVVL control set-point has changed in 3~5 sec. | 1. Engine defects |
EnableConditions |
•
Battery voltage is higher than 10V and lower than 16V.
•
No P1039, P06A4 and P06A5 | |
Threshold value |
•
Delay time of target value is longer than 2sec and CVVL control is higher than 35%. | |
Diagnosis Time |
•
5 sec | |
MIL On Condition |
•
Ssecond driving cycle (MIL On) |
Check the changes of actual position and target position of CVVL giving variety to valve lifting during engine running. (0~100%)
