Yamaha X94 Series Service Manual page 79

Symptom
When pressing the battery
capacity indicator button on
the battery pack, lamps [1]/[3]
and [2]/[4] or [1]/[2] and [3]/[4]
turn on alternately.
The battery capacity indicator
lamps [1] and [4] on the bat-
tery pack flash simulta-
neously.
After disconnecting the
charging plug on the battery
charger from the battery
pack, the battery capacity
indicator lamps continue to
light.
Abnormal sound is produced
from the Drive Unit assembly.
Check point/method
Hold down the battery capac-
ity indicator button on the bat-
tery pack for 10 seconds.
(See Chapter 2 "Error diag-
nosis mode".)
Hold down the battery capac-
ity indicator button on the bat-
tery pack for 10 seconds.
(See Chapter 2 "Battery pack
protection function diagnosis
mode".)
Charging connector on the
battery pack.
Assist driving
Turn the crank.
Turn off the power for manual
pedalling.
Troubleshooting
Possible cause/check Part replacement/action
(See Chapter 2 "Battery
pack/battery charger diagno-
sis items table".)
(See Chapter 2 "Battery
pack/battery charger diagno-
sis items table".)
Charging connector and
charging plug are wet.
Abnormal sound is produced
during assist driving.
Abnormal sound is produced
when the motor is operating.
Turning the crank produces
periodic abnormal sound.
Stepping on the pedal pro-
duces abnormal sound and
vibration (clicking).
4-6
Service
Data
Replace the parts according
to "Battery pack/battery
charger diagnosis items
table".
Replace the battery pack.
Clean the charging connector
and charging plug, and dry
them.
Check for sprocket wear or
stretched chain
Disassemble the Drive Unit.
Inspect the driven gear.
Replace the motor assembly.
Inspect the housing bearing.
Inspect the bearing.
Check the joints.
If further tightening does not
improve the problem, replace
parts.