Yamaha UMAX, Service Manual

Page: 250 / 320

DRIVE SYSTEM (YUM2E)
8-45
TROUBLESHOOTING
• The drive system fails to operate.
TIP
• Before troubleshooting, remove the following part(s):
1. Under-seat panel
2. Cargo bed
3. Service lid
4. Instrument panel assembly
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
1. Check the fuses.
(Main, and MCU)
Refer to “CHECKING THE FUSES”
on page 8-63.
Replace the fuse(s).
2. Check the battery.
Refer to “CHECKING AND
CHARGING THE BATTERY” on
page 8-63. • Clean the battery terminals.
• Recharge or replace the battery.
3. Check the main switch.
Refer to “CHECKING THE
SWITCHES” on page 8-61. Replace the main switch.
4. Check the tow switch.
Refer to “CHECKING THE
SWITCHES” on page 8-61. Replace the tow switch.
5. Check the accelerator switch.
Refer to “CHECKING THE
SWITCHES” on page 8-61. Replace the accelerator switch.
6. Check the shift switch.
Refer to “CHECKING THE
SWITCHES” on page 8-61. Replace the shift switch.
7. Check the main relay.
Refer to “CHECKING THE RE-
LAYS” on page 8-77. Replace the main relay.
8. Check the throttle position sensor.
Refer to “CHECKING THE THROT-
TLE POSITION SENSOR” on page
8-78.
Replace the throttle position sensor.