Geely EC718 2009 Workshop Manual page 722

2-640 Control System JL4G15-D
DTC code
U0426
2.12.7.15 DTC P0011 P0012 P0016 P0026
1. DTC Descriptor:
DTC P0011
DTC P0012
DTC P0016
DTC P0026
Intake camshaft position (CMP) actuator is connected to the intake camshaft and operated by the hydraulic pressure, which is
provided by the oil pump in order to change the intake camshaft to the CKP (CKP) relative angle. Intake VVT solenoid valve power
is provided from the main relay. ECM controls ground with a pulse-width modulation signal to control the engine oil flow to the
camshaft position actuator. Oil pressure moves a security slide valve within the camshaft position actuator body at the front of the
camshaft. When the safety slide valve moves, the oil is imported to the camshaft position actuator to rotate the camshaft. The intake
camshaft camshaft actuator change the camshaft working angle up to 50 degrees.
2. Conditions For Setting DTC and The Fault Location:
DTC Code DTC Detection Strategy
VVT Actual Angle and Target Angle
P0011
Difference Too Great
EC718/EC718RV EC715/EC715RV 10/2009
Description
Anti-theft Device Authentication Failure
Intake VCP Valve Timing Response Lag
Intake VCP Camshaft Valve Timing Error
Intake VCP Camshaft Gear Learn Bias Out Of Range
Intake VCP Hydraulic Control Valve
Conditions For Setting The DTC (Control Strategy)
1. VVT Actual Angle and Target Angle Difference Too
2. Camshaft completed self learn.
3. Oil Temperature Between -40°C (-40 ºF) and 120°C
4. Coolant Temperature Between 0°C (32 ºF) and
5. Engine Speed Between 600 rpm and 6,000 rpm.
6. No VVT Circuit Fault Set.
Great
(248 ºF).
105°C (221 ºF) .
Engine
Diagnostic Procedures
Fault Locations
1. Valve Timing
2. VVT Solenoid
Valve
3. Solenoid Valve
Filter
4. VVT Actuator
5. ECM