Geely EC718 2009 Workshop Manual page 274

2-192 Control System JL4G18-D
2. Conditions For Setting DTC and The Fault Location:
DTC Code DTC Detection Strategy
P0602 ECM Internal Monitoring
4. Diagnostic Steps:
Check whether there is control system DTC code other than DTC P0602.
Step 1
Yes
Step 2 Replace ECM.
2.2.7.39 DTC P0627 P0628 P0629
1. DTC Descriptor:
DTC P0627
DTC P0628
DTC P0629
Fuel pump relay coil power is provided by the main relay under the control of ECM. ECM controls pump relay terminal No.1 to the
internal ground by ECM harness connector EN01 terminal No.61 and so the fuel pump relay pulls in. ECM has an internal driver
circuit that controls relay coil ground. The driver circuit is equipped with a feedback circuit to ECM. ECM monitors the feedback
voltage control circuit to determine whether the there is an open circuit, a circuit short to ground or power supply.
2. Conditions For Setting DTC and The Fault Location:
DTC Code DTC Detection Strategy
P0627
Hardware Circuit Checks
P0628
EC718/EC718RV EC715/EC715RV 10/2009
Conditions For Setting The DTC
Fuel Pump Relay Control Circuit Open
Fuel Pump Relay Control Circuit Short to Ground
Fuel Pump Relay Control Circuit Short to Power Supply
Conditions For Setting The DTC
Circuit Open.
Circuit Short to Ground.
(Control Strategy)
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(a) Connect scan tool to the datalink connector.
(b) Turn the ignition switch to "ON" position.
(c) Press the scan tool power button.
(d) Select the following menu items: Engine/Read DTC codes.
(e) Read DTC codes.
Results:
DTC Codes Shown
DTC P0602
DTC Codes Other Than DTC P0602
Refer to
No
(Control Strategy)
Fault Locations
ECM
To Step
Yes
No
2.2.7.11 DTC Code Index
Fault Locations
1. Relay Circuit
2. Relay
3. ECM
Engine