Diagnosis Of Cooling System - Sym Wolf SB 250 Ni Service Manual

Diagnosis of cooling system

The water temperature
signal flashes
Y
A. Stop and waiting for
the engine is completely
cooled down, open cap
to check the capacity of
coolant in radiator.
Y
B. Turn on main switch
and check the water
temperature indicator
back to zero?
Y
C. C. Open radiator
cap and gently rotate
throttle, inspect if
coolant circulating?
Y
D. Close radiator cap,
measure thermo unit to
confirm voltage reduction
comply with temperature
rise.
Y
Next page
N
A-1. Refill the radiator with
coolant and check for any
leakage?
N
N
B-1. Inspect the circuits of
water temperature have
short or earth?
C-1. Eng. stop and remove
water pump cover, start the
N
motor to inspect pump
rotation?
Y
N
Replace thermo unit
Y
Y
N
N
10. Cooling System
Water leaking
problem
Short or earth
problem
Meter problem
Water pump repair
Water hose clogged
10-3