Yamaha Grizzly550 User Manual page 409

EPS (ELECTRIC POWER STEERING) SYSTEM (for
Fault code No. 41,42,
43,45
Order Item/components and probable
cause
1 Connections
• EPS motor coupler
2 Open or short circuit in EPS motor
lead.
3 Defective EPS motor.
Fault code No. 52
Order Item/components and probable
cause
1 Malfunction in EPS control unit.
Fault code No. 53
Order Item/components and probable
cause
1 Faulty battery.
2 Malfunction in rectifier/regulator or
charging system.
3 Malfunction in EPS control unit.
Symptom EPS motor: open or short circuit detected.
Check or maintenance job
• Check the coupler for any pins
• Check the locking condition of
• If there is a malfunction, repair it
• Repair or replace if there is an
• Between EPS motor and EPS
Replace if defective.
Refer to "CHECKING THE EPS
MOTOR (for
YFM5FGP/YFM7FGP)" on page
9-97.
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 (low
battery voltage).
Check or maintenance job
Charge or 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.
9-72
YFM5FGP/YFM7FGP)
that may have pulled out.
the coupler.
and connect the coupler se-
curely.
open or short circuit.
control unit coupler.
(red–red)
(black–black)
Reinstatement
method
Setting the
main switch to
"OFF".
Reinstatement
method
Setting the
main switch to
"OFF".
Reinstatement
method
Setting the
main switch to
"OFF".
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