Yamaha YFM660FP Service Manual page 397

EB803020
TROUBLESHOOTING
IF THE FOUR-WHEEL DRIVE INDICATOR FAILS TO COME ON:
Procedure
Check:
1.Fuse (main, four-wheel drive)
2.Battery
3.Main switch
4.Four-wheel drive relay 1
5.Four-wheel drive relay 2
6.Four-wheel drive relay 3
NOTE:
Remove the following part(s) before trouble-
●
shooting:
1)Seat
2)Front carrier
3)Front fender
Use the following special tool(s) for trouble-
●
shooting.
EB802011
1.Fuse (main, four-wheel drive)
Refer to "CHECKING THE SWITCH".
EB802012
2.Battery
Check the battery condition.
●
Refer to "CHECKING THE BATTERY" in
CHAPTER 3.
Open-circuit voltage:
12.8 V or more at 20 °C (68 °F)
3.Main switch
Refer to "CHECKING THE SWITCH".
*
2WD/4WD SELECTING SYSTEM
CONTINUITY
CORRECT
CORRECT
9 - 53
7.On-command four-wheel drive switch and
differential gear lock switch
8.Gear motor
9.Wiring connections
(the entire 2WD/4WD selecting system)
Pocket tester:
P/N. YU-03112, 90890-03112
NO CONTINUITY
Replace the fuse.
INCORRECT
Clean the battery terminals.
●
Recharge or replace the battery.
●
INCORRECT
Replace the main switch.
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ELEC