Yamaha YXR660FAS Service Manual Page 404

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