Geely EC718 2009 Workshop Manual page 162

2-80 Control System JL4G18-D
3. Schematic:
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From Battery
4. Diagnostic Steps:
Note
Before carrying out this diagnosis step, observe the data list on scan tool and analyze the accuracy of the data, as
these will help with quick diagnosis.
Initial inspection.
Step 1
Next
Step 2 Check the Pre-Catalytic oxygen sensor heater resistance.
EC718/EC718RV EC715/EC715RV 10/2009
Main Relay
Pre-catalytic Oxygen Sensor
To Post-catalytic Oxygen Sensor
Check the existence of following factors that will affect the heated
oxygen sensor working status:
(a)
(b)
(c)
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Exhaust system leaks or blockage.
Water entering into the heated oxygen sensor connector.
After engine working in high temperatures, whether exhaust
pipes are too hot.
Engine
Engine
Control
Module
FE02-5008b