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.
ECU sets P1037 when ECU receives no message from one of the CVVL position sensor1 or 2.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
No message from one of the CVVL position sensor1 or 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 |
•
No response from CVVL position sensor to PCM | |
Diagnosis Time |
•
0.15 sec | |
MIL On Condition |
•
MIL Off |
Check the changes of actual position and target position of CVVL giving variety to valve lifting during engine running. (0~100%)
