Geely EC718 2009 Workshop Manual page 730

2-648 Control System JL4G15-D
Next
Use scan tool to confirm whether the DTC code is stored again.
Step 12
Yes
Step 13 Diagnostic completed.
5. Repair Instructions:
Replace intake pressure / temperature sensor. Refer to
Refer to 2.2.8.8 Engine Control Module
2.12.7.17 DTC P0076 P0077
1. DTC Descriptor:
DTC P0076
DTC P0077
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.
ECM controls the solenoid valve internal ground through ECM harness connector EN01 terminal No.2. There is a feedback circuit
within ECM. Engine ECM monitors feedback signals to determine whether the control circuit is open, short to ground or short to
voltage. If ECM detects the control circuit voltage is within the specified range when the control circuit is instructed to disconnect, it
will set this DTC code.
2. Conditions For Setting DTC and The Fault Location:
DTC
DTC Detection Strategy
Code
P0076
Hardware Circuit Checks
P0077
EC718/EC718RV EC715/EC715RV 10/2009
2.2.8.7 Intake Air Pressure and Temperature Sensor
ReplacementReplace ECM.
Intake VCP Hydraulic Control Valve Coil Low Voltage or Open Circuit
Intake VCP Hydraulic Control Valve Coil High Voltage
Conditions For Setting The DTC (Control Strategy)
1. Circuit Open
2. Circuit Short To Power Supply
3. Circuit Short To Ground
(a) Connect scan tool to the datalink connector.
(b) Turn the ignition switch to "ON" position.
(c) Clear DTC code.
(d) Start and run the engine at idle speed to warm up the engine
for at least 5 min.
(e) Read control system DTC code again to confirm that the
system has no DTC code.
Intermittent Fault. Refer to
No
Fault Check
Engine
2.2.7.3 Intermittent
Replacement.
Fault Locations
1. Solenoid Valve
Circuit
2. Solenoid Valve
3. ECM