CF MOTO CF500-5B 2009, Service Manual, Page: 262 / 272

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CFMOTO
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Diagnosis troubles according to engine fault phenomena
Before start to diagnosis fault, please take the primary inspection first:
1
#
Engine failure indicator light works regularly.
2
#
Affirm that no errors Code have been found by Diagnosis Analyze.
3
#
Affirm the fault that user complaint is exist, and affirm the condition of fault happened.
Then, take external inspection:
$
1
!
Check fuel pipe whether has oil leak phenomena or not.
$
2
!
Check vacuum tube if rupture, kink or incorrect connect.
$
3
!
Check air intake pipe whether clogged, leaked, been staved or damaged or not.
$
4
!
Check ignition coil of ignition system whether rupture, aged or not, firing sequence
whether correct or not
%
$
5
!
Check ground pole of wiring harness whether clean or fast or not
%
$
6
!
Check joints of sensor or actuator whether loose or poor contacts or not.
Notice
" Please maintain the faults as above in advance. If not, the further fault diagnosis will
be affected.
Diagnosis help:
1
#
Engine has no fault records
%
2
#
Affirm the complaint of fault happened
%
3
#
Do not ignore vehicle maintenance working, cylinder pressure, mechanism
timing, fuel etc effect against system during overhaul
4
#
Replace ECU and test it.
If Trouble Code is cleared, it means defective on ECU;
If Trouble Code is not cleared, put back original ECU and repeat inspecting
procedure to start again overhaul inspections.
Troubleshooting
"
Starting Failure/Hard Starting
Engine can rotate but starting failure
Hard Starting in heating engine
Hard Starting in cold engine
Regularly rotate speed, but engine starting hard at any time
Engine works regularly
&
but unsteady idle speed at any time
Engine works regularly
&
but unsteady idle speed when engine is in warming-up
Engine starting normally, but idle speed unsteady after warming-up.
Engine starting normally, but unsteady idle speed or power off when engine in
partly loading(such as: opening head light)
Engine starting regularly, but idle speed is too high.
Rotate speed can not increase or engine power off when in acceleration.
Reaction slowly when in acceleration.
No power and poor performance when in acceleration