Troubleshooting - Yamaha UMAX Service Manual

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
1. Check the fuses.
(Main, and MCU)
Refer to "CHECKING THE FUSES"
on page 8-63.
OK ↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-63.
OK ↓
3. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-61.
OK ↓
4. Check the tow switch.
Refer to "CHECKING THE
SWITCHES" on page 8-61.
OK ↓
5. Check the accelerator switch.
Refer to "CHECKING THE
SWITCHES" on page 8-61.
OK ↓
6. Check the shift switch.
Refer to "CHECKING THE
SWITCHES" on page 8-61.
OK ↓
7. Check the main relay.
Refer to "CHECKING THE RE-
LAYS" on page 8-77.
OK ↓
8. Check the throttle position sensor.
Refer to "CHECKING THE THROT-
TLE POSITION SENSOR" on page
8-78.
OK ↓
DRIVE SYSTEM (YUM2E)
NG →
Replace the fuse(s).
NG →
• Clean the battery terminals.
• Recharge or replace the battery.
NG →
Replace the main switch.
NG →
Replace the tow switch.
NG →
Replace the accelerator switch.
NG →
Replace the shift switch.
NG →
Replace the main relay.
NG →
Replace the throttle position sensor.
8-45