Yamaha WR450FX, Owner'S Service Manual

Page: 203 / 220

7-6
ELECTRIC STARTING SYSTEM
INSPECTION STEPS
If the starter motor will not operate, use the following inspection steps.
*1 marked: Refer to "CHECKING THE FUSE" section in the CHAPTER 3.
*2 marked: Refer to "CHECKING AND CHARGING THE BATTERY" section in the CHAPTER 3.
*3 marked: Refer to "CHECKING THE MAIN SWITCH" section.
*4 marked: Refer to "CHECKING THE NEUTRAL SWITCH" section.
•
Remove the following parts before inspection.
1. Seat
2. Rear fender
• Use 12 V battery in this inspection.
•
Use the following special tools in this inspection.
*1 Check fuse. No good
→
Replace fuse and check wire harness.
OK
↓
*2 Check battery. No good
→
Recharge or replace.
OK
↓
Check each coupler and wire connection. No good
→
Repair or replace.
OK
↓
*3 Check main switch. No good
→
Replace.
OK
↓
Check starter motor operation. No good
→
Repair or replace.
OK
↓
Check starting circuit cut-off relay. No good
→
Replace.
OK
↓
Check starter relay. No good
→
Replace.
OK
↓
*4 Check neutral switch. No good
→
Replace.
OK
↓
Check clutch switch. No good
→
Replace.
OK
↓
Check diode. No good
→
Replace.
OK
↓
Check start switch. No good
→
Replace.
Pocket tester:
YU-3112-C/90890-03112
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