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
DTC P0016 is set when the actual camshaft position is retarded beyond the reference value. This condition may be caused by incorrect mechanical timing.
DTC Detecting Condition
Item | Detecting Condition | Possible Cause |
DTC Strategy | Camshaft edge in CVVT full retard position out of Range compared to Reference position
| Valve timing Oil Control Valve CVVT Assembly |
Enable Conditions | Camshaft position adaptation value is valid
|
Threshold Value | Camshaft position adaptation < -15 °CRK
Camshaft position adaptation > +15 °CRK
|
Diagnostic Time | 80 rev.
|
Mil On Condition | 2 Drive Cycles
|
Signal Waveform & Data
Connect GDS and select Data Analysis.
After warming-up, check following items.
Data analysis
? A Sector : CVVT works
? B Sector : Limp Home Mode (CVVT doesn't work.)
? CVVT Control Flow (A Sector)
: Acceleration pedal(?) shift ? Engine RPM change ? Camshaft Position Setpoint (?) change ? CVVT Valve Duty(?) change ? Inlet CAM Position(?) change