Troubleshooting - Yamaha 2004 YXR660 Service Manual

EB803020

TROUBLESHOOTING

IF THE FOUR-WHEEL DRIVE INDICATOR FAILS TO COME ON:
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
NOTE:
• Remove the following part(s) before trouble-
shooting:
1) Console
• Use the following special tool(s) for trouble-
shooting.
EB802011
1. Fuses (main, four-wheel drive)
Refer to "CHECKING THE SWITCH".
EB802012
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)
3. Main switch
Refer to "CHECKING THE SWITCH".
*
2WD/4WD SELECTING SYSTEM
CONTINUITY
CORRECT
CORRECT
9 - 52
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-C, 90890-03112
NO CONTINUITY
Replace the fuse(s).
INCORRECT
• Clean the battery terminals.
• Recharge or replace the battery.
INCORRECT
Replace the main switch.
– +
ELEC