General Information

Component Location





General Description

The CVVT (Continuously Variable Valve Timing) system is installed to the chain sprocket of the camshafts. This system controls the camshaft to provide optimal valve timing. The PCM controls the Oil Control Valve (OCV), based on the signals output from air flow, throttle position and engine coolant temperature. The CVVT controller regulates the camshaft angle using oil pressure through the OCV. As result, the relative position between the camshaft and the crankshaft becomes optimal and the engine torque improves, fuel economy improves, exhaust emissions decrease under overall driving conditions.

DTC Description

The deviation of the camshaft position from the target point is evaluated during stable driving condition. The PCM accumulates this deviation for a certain period and sets DTC P0011 when the accumulated deviation is too high. The target camshaft position is predetermined value depending on engine speed and throttle angle in the PCM.

DTC Detecting Condition





Specification









Diagnostic Circuit Diagram





Signal Waveform & Data

1. Connect GDS and select Data Analysis.
2. After warming-up, check following items.




3. Data analysis
- A Sector : CVVT works
- B Sector : Limp Home Mode (CVVT doesn't work.)
- CVVT Control Flow (A Sector)
: Acceleration pedal (1) shift -> Engine RPM change -> Camshaft Position Stipend (2) change -> CVVT Valve Duty (3) change -> Inlet CAM Position (4) change