Geely EC718 2009 Workshop Manual page 119

Engine
Next
Reproduce the fault and use instruments to record engine control module data.
Step 4
Next
Step 5 Intermittent malfunction indicator light, but a DTC code is not set in the system.
Next
Other checks.
Step 6
Next
Step 7 Refer to fault symptom table.
2.2.7.4 Fault Symptom Table
If a fault occurred, but no DTC code stored within ECM, or the fault cause can not be identified in the basic checks, you should
diagnose or exclude the fault based on the sequence listed in the following table.
Symptoms
Engine does not run.
Suspected Fault Items
1. Battery
Control System JL4G18-D
(a) Connect a scan tool and use the data record function to
record road test data. After pressing the vehicle data recorder
button, the scan tool can record engine control module data
in the event of intermittent fault occurring, and then the data
can be used to identify the fault location.
(b) Another diagnostic method is when the vehicle is driven
connect a digital multimeter to the suspicious circuit. Digital
multimeter abnormal readings may indicate the fault location.
Following conditions may cause intermittent malfunction indicator
light, but the system does not set the DTC codes:
(a) Relay working abnormally, the engine control module
controlled electromagnetic valves or switches causing
electromagnetic interference.
(b) Non-original or aftermarket accessories, such as a phone,
alarm, lights or radio equipment, not installed properly.
(c) Intermittent malfunction indicator light control circuit short to
ground.
(d) Engine control module ground loose.
(a) Test whether Air-Conditioning compressor clutch diodes at
both ends and other diodes are in open circuit.
(b) Check charging system whether there are following
conditions existing:
• Generator rectifier fault within the electrical system may
result in the communication signal interference.
•
Generator output voltage is correct or not. If the generator
output voltage is lower than 9V or higher than 18V, repair
the charging system.
"Starting/Charging System" in
Information and
EC718/EC718RV EC715/EC715RV 10/2009
Relevant Sections
the2.11.7 Diagnostic
Procedures.
2-37