•
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
A
Signal Voltage Remains High
B
Signal Voltage Remains Low
C
Signal Voltage Normal
D
A
Replace the pre-catalytic oxygen sensor.
B
C
D
Step 8
Check whether the spark plug is normal?
(a)
Refer to "Ignition System" in the
.
No
Replace with the correct type of spark plug.
Yes
Step 9
Check whether the high-voltage resistance is normal?
(a)
Check whether the high-voltage resistance connection is
solid, not damaged and so on.
No
Repair the faulty part. If necessary, replace
with a new high-voltage resistor.
Yes
Step 10
Check whether the crankshaft position sensor signal tooth is correctly installed?
(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.
No
Diagnose the faulty part. If necessary, replace
the faulty parts.
Yes
Step 11
Check whether air-conditioning system is working correctly?
(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
Engine
Fuel System JL4G18-D
2-245
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
Page 4: ......
Page 330: ...Next Step 10 End 2 248 Fuel System JL4G18 D Engine EC718 EC718RV EC715 EC715RV 10 2009 ...
Page 1164: ......
Page 2008: ......