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.PCM receives the angle value of CVVL position control shaft from CVVL position sensors.
1. Fault or correlation error both of CVVL position sensor1 and 2
2. The angle values of sensor1 and 2 are higher than threshold.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Error message from both of CVVL position sensor1 and 2
•
Error message from both of CVVL position sensor1 and 2 | 1. CVVL Position Sensor 2. Poor connection 3. Open circuit of power line or short circuit to ground 4. Open circuit of signal line or short circuit to ground |
EnableConditions |
•
Battery voltage is higher than 10V and lower than 16V.
•
No P06A4 and P06A5 | |
Threshold value |
•
P1035 and P1037 occur
•
The difference between sensor1 and sensor2 is higher than 8˚ | |
Diagnosis Time |
•
0.15 sec
•
1.2 sec | |
MIL On Condition |
•
Second 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%)
