Hyundai GENESIS COUPE BK 2010 Manual page 372

Retarded (Bank 1)
Component Location
General Description
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. 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 over all driving conditions.
DTC Description
ECM monitors CAM phaser error while CMP signal is normally generating and vehicle is driving in 2000 ~ 3000rpm.
If the CAM phaser does not move although ECM commands OCV duty cycle ECM determines that a faultexists and a
DTC is stored.
DTC Detecting Condition
Item
DTC Strategy
Enable Conditions
Case 1
Threshold
value
Case 2
Diagnosis Time
MIL On Condition
Specification
Detecting Condition
• Determines if the phaser is stuck or has steady-state
error
• CAM signal is normally generating
• Vehicle is on driving (2000 ~ 3000RPM) for 5 minutes
• 5 CAD < Cam Actual Position < 50 CAD
• Duty Cycle > 90% or Duty Cycle < 10%
• Cam Position error > 15 CAD
(Difference between Actual Postion and Desire
Position is more than 15°)
• Timing Counter > 80
• Continuous (within 5min.)
• 2 Driving Cycles
Possible Cause
• Engine Oil
• OCV stuck
• CVVT stuck