Yamaha GRIZZLY 700 FI YFM7FGPW, Service Manual

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ELEC
EPS (ELECTRIC POWER STEERING) SYSTEM
Fault code No. 21 Symptom Speed sensor: open or short circuit detected.
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Connections
• Speed sensor coupler
• EPS control unit coupler at the
wire harness
• Check the coupler for any pins
that may have pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler
securely.
Starting the
engine and acti-
vating the vehi-
cle speed
sensor by oper-
ating the vehicle
above 5 km/h, or
turning the main
switch to “OFF”,
then to “ON”,
and then delet-
ing the fault
codes. Refer to
“DIAGNOSTIC
MODE” and
“Deleting fault
codes”.
2 Open or short circuit in wire har-
ness. • Repair or replace if there is an
open or short circuit.
• Between speed sensor coupler
and EPS control unit coupler.
(white–white)
3 Defective speed sensor. • Execute the diagnostic mode.
(Code No.21)
• Replace if defective.
Refer to “SIGNALING SYSTEM”.
Fault code No. 22 Symptom No normal signals are received from the ECU.
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Connections
• EPS control unit coupler at the
wire harness
• ECU coupler at the wire harness
• Check the coupler for any pins
that may have pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler
securely.
Turning the
main switch to
“OFF”.
2 Open or short circuit in wire har-
ness. • Repair or replace if there is an
open or short circuit.
• Between ECU coupler and EPS
control unit coupler.
(orange/white–orange/white)
3 Malfunction in ECU. Replace the ECU.