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 saves the maximum and minimum angle values of control shaft into deactivated memory, once it is installed.If this adaptation process isn't conducted, it is unable to control CVVL.
Adaptation process is not conducted or the angle value is off the optimal range after adaptation is conducted.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Maximum or minimun value of valve lift is out of optimal adaptation value.
•
Valve adaptation time is longer than maximum delay time. | 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 P1039, P06A4 and P06A5 | |
Threshold value |
•
No adaptation for 3 sec over or adaptation value is out of the optimal range after adaptation. | |
Diagnosis Time |
•
3 sec | |
MIL On Condition |
•
First driving cycle (MIL On) |
adaptation status of mechanical deviation (ON/OFF)
→ The optimal adaptation value of valve lift : 65~89˚ (min~max)
