XY Powersports XY500UTV, Руководство по обслуживанию

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13. TROUBLESHOOTING
13-20
5
no next
yes Replace fuel
6 Check fuel and observe the fault if caused after
fueling
no next
yes Eliminate engine
mechanism fault
7 Check compression of cylinder and observe the
pressure.
no next
yes Diagnosis
help
8 Contact EFI commutator, open ignition switch,
check ECU5#
、 10# 、 23# stitch, the power
whether supply normal or not, check 2# 、 21#
stitch whether Put up iron or not.
no Examine and repair
relevant wiring
（
8
）
Engine starting normally, but idle speed unsteady after warming-up.
Possible defective part
：
1
、
fuel containing water 2
、
engine water temperature sensor
；
3
、
spark plug
；
4
、
throttle valve body and idle speed side air duct; 5
、
input air duct
；
6
、
idle speed valve
；
7
、
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
yes next
2 Check spark plug, look its type and gap if accords with
standard.
no Adjust or replace
yes Clean related parts
3 Disassembly idle speed valve and check the throttle valve
body, idle speed valve and idle speed side air duct
whether have carbide accumulated or not.
no
yes
4 Pull out connector of engine water temperature sensor,
starting engine, observe idle speed whether is unsteady or
not when engine is in warming-up.
no
yes
5 Disassembly injector, and check the injector by special
washing analysis instrument if exists the phenomena of
leaks, clogs or flux discrepantly.
no
yes
6 Check fuel and observe the fault if caused after fueling
no
yes
7 Check compression of cylinder and observe the pressure
if it is discrepantly.
no
yes
8 Contact EFI commutator, open ignition switch, check
ECU5#
、 10# 、 23# stitch, the power whether supply
normal or not, check 2# 、 21# stitch whether Put up iron or
not.
no
（
9
）
Engine starting normally, but unsteady idle speed or power off when engine in partly
loading(such as: opening head light)