Diagnostics - Yamaha SZR 660 Service Manual

COOLING SYSTEM
DIAGNOSTICS
THE FAN MOTOR
FAILS
TO RUN
Procedure
Check:
1
.
Puses {main and fan motor)
2.
Battery
3.
Main switch
4.
Fan motor
(1st test)
5.
Fan motor
(2nd
test)
6.
Thermo
switch
7.
Harness connections
(entire
system
of
connections)
NOTE:
Before
making
the inspections mentioned,
remove
the following parts:
1.
Seat
2.
Cowling
To check
for functioning defects,
use
the folfowing special tools.
fi^s Pocket
tester:
V
P/N.
YU-03112
P/N.
90890-03112
1 .
Fuses (main and
fan
motor)
Remove
the fuses.
Connect
the
pocket
tester (Q x
1 )
to the fuse.
Check
fuse
continuity.
See
the
"FUSE INSPECTION AND
REPLACEMENT"
section
in
CHAPTER
3.
DISCONTINUITY
1
Replace the fuse
(es).
g
CONTINUITY
2.
Battery.
Check
the conditions of the battery.
See the
"BATTERY INSPECTION'
section
in
CHAPTER
3.
Voltage:
12.8V
or
over
at
20°C
(68°F)
INCORRECT
1
Clean
the battery terminals.
Recharge
or
replace
the battery.
See
the
"BATTERY INSPECTION"
section in
CHAPTER
3.
JT
CORRECT
*
COOLING SYSTEM
*
3.
Main
switch.
Disconnect
the
main
switch
connector from
the harness.
Connect
the
pocket
tester
(Qx1)
to the
main
switch terminals.
See
the
"SWITCH CHECK"
section.
o
CORRECT
4.
Fan motor
(1st Test).
Disconnect
the fan
motor
connector.
Connect a battery (12V)
as
shown.
Tester terminal (+) -»
Blu/White cable
(1)
Tester terminal
{-) -»
Black cable
(2)
Check the functioning
of
the fan motor.
INCORRECT
The
main
switch
is
defective. Replace.
IT
FAILS
TO RUN
The
fan
motor
is
defective.
Replace.
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