Study Guide and Component Location 2011 G 4.6 DOHC Engine Engine Control | Auto Repair and Study Guide w/ General Description | Study Guide The CVVT (Continuously Variable Valve Timing) system is installed to the chain sprocket of the intake camshaft. Study Guide This system controls the intake camshaft to provide the optimal valve timing for every driving condition. The ECM controls the Oil Control Valve(OCV), based on the signals output from mass air flow, throttle position and engine coolant temperature. The CVVT controller regulates the intake 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. Study Guide and DTC Description | If there is a delay between the target angle and the real angle over 5 times,ECM sets DTC P0011. DTC Detecting Condition Study Guide | Item | Detecting Condition | Possible Cause | DTC Strategy Study Guide | | • | Contamination of Oil / Clog of Oil path | Study Guide | Enable Conditions Study Guide | • | Time after | target VVT angle –VVT angle | 6 deg(2 sec) | • | Time after engine start 10 ~ 60 sec | • | Coolant temperature : 0~120°C | • | Engine oil temperature : 0~130°C | | Threshold value Study Guide | • | Counter of delayed following target valve timing 5 times | | Diagnosis Time Study Guide | • | -Auto Repair and Study Guide | | MIL On Condition Study Guide | | Auto Repair and Study Guide w/ Specification | OCV | Specification | Coil Resistance (Ω) | 6.7 ~ 7.7 (20°C) | Diagnostic Circuit Diagram | Study Guide , Auto Repair , Study Guide , Auto Repair , Study Guide , Auto reapir Fig.1) Normal waveform of OCV & IN-CMPS at idle. Fig.2) Normal waveform of OCV & IN-CMPS at acceleration with load. Study Guide , Auto Repair , Study Guide , Auto Repair , Study Guide , Auto Repair |
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