Yamaha Grizzly550 User Manual page 410

EPS (ELECTRIC POWER STEERING) SYSTEM (for
Fault code No. 54
Order Item/components and probable
cause
1 Malfunction in EPS control unit.
Fault code No. 55
Order Item/components and probable
cause
1 Faulty battery.
2 Malfunction in rectifier/regulator.
3 Malfunction in EPS control unit.
Symptom Relay contacts in the EPS control unit are welded togeth-
er.
Check or maintenance job
Replace the EPS control unit.
Symptom Power supply to the EPS control unit is not normal (high
battery voltage).
Malfunction in control unit.
Check or maintenance job
Replace the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 9-84.
Replace if defective.
Refer to "CHECKING THE REC-
TIFIER/REGULATOR" on page
9-93.
Replace the EPS control unit.
9-73
YFM5FGP/YFM7FGP)
Reinstatement
method
Setting the
main switch to
"OFF".
Reinstatement
method
Setting the
main switch to
"OFF".