Examination Causes Corrections
4. Fast startup system
Preparations:
1.Disconnect lead socket joint of the temperature switch.
2.Determine if the preheating plug is switching
(a)Ensure the starting switch is “opened”
(b)Connect the cylinder wall and any preheating plug with a voltmeter
(c)Turn the starting switch to “close” position.
If the preheating plug is switching, the voltmeter will display voltage (12V)
If the voltmeter nger does not move, it means that the preheating plug is not switched
3.Failure repair
The preheating plug is switching
The indicating light of the
preheating plug is not on
Indicating light bulb damage Replace the bulb
Fast starting timer Fast starting timer damage Replace the fast starting timer
The indicating light of the
preheating plug is on for 0.3
second
Fast starting timer damage Replace the fast starting timer
The indicating light of the
preheating plug is on for 3.5
second
Turn the starting switch from “start” back to
“close” after the engine has been started, if
the preheating plug relay keeps closing for
less than 14 seconds, then it indicates that the
fast starting up timer is damaged.
Replace the fast starting timer
Turn the starting switch from “open”
to “close” , if the preheating plug relay
keeps closing for less than 14 seconds,
then it indicates that the fast starting up
timer is damaged.
Replace the fast starting timer
temperature switch Temperature switch damage Replace the temperature switch
Preheating plug connection Preheating plug not connected Replace the preheating plug
The preheating plug is not connected
The indicating light of the
preheating plug is not on Indicating light fuse broke Replace the fuse
Fast starting timer Fast starting timer damage Replace the fast starting timer
The indicating light of the
preheating plug is on for 3.5
second
Preheating plug relay damage The
preheating plug is not switching when
the starting switch turns from “open” to “
close”.
Replace the preheating plug
Preheating plug relay wires damage Repair or replace the wires
Damage of fuse or wires The preheating
plug is switching when the starting switch
turns from “open” to “close”.
Replace the fuses or wires
2.Unstable idle speed
Maintenance documents-Fault diagnosis and troubleshooting
Examination Causes Corrections
Idle speed system Idle speed improper adjustment Adjust the idle speed
High idle speed controlling
apparatus
High idle speed controlling apparatus
damage
Repair or replace the high idle speed
controlling apparatus
Throttle valve control
system Throttle valve control system damage Repair or replace the throttle valve control
system
Fuel system
Fuel leakage of blockage of the fuel
system Repair or replace the fuel system
Air in the fuel system Let air in the fuel system out
Water in the fuel system Replace fuel
Fuel lter Fuel lter elements blockage Replace the fuel lter elements
