1. CVVL motor relay
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 monitors the power line from battery to PCM for motor control.
ECU sets P1033 when there is a electrical problem for power supply due to short to ground.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
The power voltage from battery to PCM is lower than threshold. | 1. CVVL motor leave 2. Short to ground of CVVL motor relay |
EnableConditions |
•
Battery voltage is higher than 10V and lower than 16V.
•
No P013C
•
CVVL Relay ON | |
Threshold value |
•
Lowest output threshold | |
Diagnosis Time |
•
0.5 sec | |
MIL On Condition |
•
First driving cycle (MIL On) |
Check the status of CVVL Motor relay ON/OFF using GDS current data.
