Geely EC718 2009 Workshop Manual page 327

Engine
D
Check whether the spark plug is normal?
Step 8
Yes
Step 9 Check whether the high-voltage resistance is normal?
Yes
Check whether the crankshaft position sensor signal tooth is correctly installed?
Step 10
Yes
Step 11 Check whether air-conditioning system is working correctly?
Fuel System JL4G18-D
• Observe whether there is a significant change in the pre-
catalytic oxygen sensor voltage data, as the signal
voltage will increase rapidly.
During the above test, the oxygen sensor signal voltage should
have a significant change.
Significant voltage change?
Signal Voltage No Response
Signal Voltage Remains High
Signal Voltage Remains Low
Signal Voltage Normal
Replace the pre-catalytic oxygen sensor.
A
Go to step 13
B
Go to step 14
C
(a) Refer to "Ignition System" in
Diagnostic.
Replace with the correct type of spark plug.
No
(a) Check whether the high-voltage resistance connection is
solid, not damaged and so on.
Repair the faulty part. If necessary, replace
No
with a new high-voltage resistor.
(a) Check whether the crankshaft position sensor signal tooth
installation is solid. The signal tooth can not be missing, wear
and tear and so on.
Diagnose the faulty part. If necessary, replace
No
the faulty parts.
(a) Check the compression clutch engagement. Air-Conditioning
system pressure can not be too high. Check whether the air-
conditioning compressor is working properly. Refer to the
EC718/EC718RV EC715/EC715RV 10/2009
2-245
A
B
C
D
the2.10.7.6 Spark Plug