Study Guide for The CVVT (Continuously Variable Valve Timing) system is installed to the chain sprocket of the intake camshaft. 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.Study Guide The CVVT controller regulates the intake camshaft angle using oil pressure through the OCV. As result,Study 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 DTC Description | If there is a delay between the target angle and the real angle over 5 times,ECM sets DTC P0014. Study the Item | Detecting Condition | Possible Cause | Study Guide DTC Strategy | | • | Contamination of Oil / Clog of Oil path | | Study Guide Enable Conditions | • | 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 | | Study Guide Threshold value | • | Counter of delayed following target valve timing > 5 times | | Diagnosis Time | | MIL On Condition | | OCV | Specification | Coil Resistance (Ω) | 6.7 ~ 7.7 (20°C) | More Diagnosis Procedure Study , Study , Study , Study , Study , Study , Study , Study , Study , |
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