The CVVT (Continuously Variable Valve Timing) system built on the camshaft helps the engine decrease the exhaust gas and increase engine power and fuel economy by changing the valve open/close timing of the camshaft continuously. The valve control solenoid, the main control part of the CVVT, changes the direction of the oil path through the CVVT by the duty control of the PCM and changes the open and close timing of the intake and exhaust valves.
PCM sets DTC P0076 if the PCM detects that the intake valve control solenoid control circuit is shorted to ground.
Item
Detecting Condition
Possible Cause
DTC Strategy
Electrical Check
Short to ground in control circuit
Poor connection or damaged harness
Faulty Intake Valve Control Solenoid
Enable Conditions
10V < Battery voltage < 16V
Threshold Value
Short circuit to ground or open circuit
Diagnostic Time
2sec.
Mil On Condition
2 Driving Cycles
Oil Control Valve
Normal Parameter At 20? (68?)
Insulation Resistance
9.9±0.5?
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