CF MOTO CF500-5B 2009, Service Manual, Page: 266 / 272

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CFMOTO
yes next
2
Contact fuel pressure meter(contact front point of
oil input pipe of injector), starting engine, check the
fuel pressure whether is around 300kPa or not
no
examine and repair
oil support system
yes next
3
Pull out ignition coil, and contact with spark plug,
keep pole of spark plug 5mm away with body of
engine, starting engine and check it whether has
blue-white high pressure fire or not.
no
examine and repair
ignition system
yes next
4
Check spark plug, look its type and gap if accords
with standard.
no Adjust or replace
yes
Examine and repair
wiring or replace
sensor
5
Pull out connector of engine water temperature
sensor, starting engine, observe engine whether
succeed starting or not at this moment.
no next
yes
Clean throttle valve
body and idle speed
air duct
6
Draw accelerograph gently, observe it whether
starting engine easily or not.
no next
yes replace
7
Disassembly injector, and check the injector by
special washing analysis instrument if exists the
phenomena of leaks or clogs
no next
yes Replace fuel
8
Check fuel and observe the fault if caused after
fueling
no next
yes
Eliminate engine
mechanism fault 9
Check air pressure of cylinder and observe the
pressure if is discrepantly.
no next
yes next
10
Check engine ignition timing if accords with
standard.
no
examine and repair
ignition timing
yes Diagnosis help
11
Contact EFI commutator, open ignition switch,
check ECU5#
#
10#
#
13# stitch the power whether
supply normal or not, check 2#
#
21# stitch whether
Put up iron or not.
no
Examine and repair
relevant wiring
# #
6
$ $
Engine works regularly
% %
but unsteady idle speed at any time
Possible defective part
"
1
#
fuel containing water
%
2
#
injector; 3
#
spark plug
%
4
#
throttle
valve body and idle speed side air duct
%
5
#
input air duct
%
6
#
idle speed valve; 7
#
ignition
timing
%
8
#
engine mechanism part
Overhaul:
Ref no Operation Test result Next Steps
yes
Examine and repair
air input system 1
Check air cleaner and input air duct whether are
clogged or not
no next