I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I II II I I I I I II II II II II I I I I I I I I!
12-6
TROUBLESHOOTING
’
UNSTABLE LOW IDLING
Checkpoint
Trouble Cause
Remedy
1
1
Low idling system
NG
Low idling improperly adjusted
NG
.
Adjust the low idling
I
c
I
Low idling speed control device
NG
Defective low idling speed
NG Repair or replace the low idling
1
control device
speed control device
*
.
I
OK 1
Throttle control system
NG
Throttle control system
improperly adjusted
NG
Adjust the throttle control
system
OK
I
Fuel system
. . . v
Fuel system leakage or blockage
NG
l--i
Repair or replace the fuel system
L
NG
Air in the fuel system
NG
L
Bleed the air from the fuel system
NG .
4 Water particles in the fuel system
NG
Change the fuel
OK
Fuel filter
i
I
r
NG
Clogged fuel filter element
NG
Replace the fuel filter element or
the fuel filter cartridge
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