Geely EC718 2009 Workshop Manual page 167

Engine
Post-catalytic Oxygen Sensor
1 2
Yes
Check the terminal No.2 to ground voltage.
Step 3
Post-catalytic Oxygen Sensor
Harness Connector EN03
4
Yes
Step 4 Check the Post-Catalytic oxygen sensor heater control terminal continuity.
3 4
FE02-5013b
3 2 1
FE02-5014b
Control System JL4G18-D
(a) Turn the ignition switch to "OFF" position.
(b) Disconnect the post-catalytic oxygen sensor wiring harness
connector.
(c) Measure the Post-Catalytic oxygen sensor heater resistance.
Standard Resistance: Between connector No.1 and No.2, 9 Ω
(68 ºF) at 20°C
(d) Connect the post-catalytic oxygen sensor wiring harness
connector.
Is the resistance the specified value?
Replace oxygen sensor. Refer to
No
Catalytic Oxygen Sensor Replacement
(a) Turn the ignition switch to "OFF" position.
(b) Disconnect the post-catalytic oxygen sensor wiring harness
connector.
(c) Turn the ignition switch to "ON" position.
(d) Measure the Post-Catalytic oxygen sensor harness
connector EN03 terminal No.1 to ground voltage.
Standard Voltage: 11-14 V
(e) Connect the post-catalytic oxygen sensor wiring harness
connector EN03.
Is voltage the specified values?
The Post-Catalytic oxygen sensor heater
No
power supply circuit malfunction.
EC718/EC718RV EC715/EC715RV 10/2009
2-85
2.4.7.1 Post-