Yamaha 2006 FJR1300AS Service Manual page 117

Fault code No. Sh_ _21
Order Item/components and probable
cause
1 Connections
• Wire harness MCU (motor control
unit) coupler
• Gear position sensor coupler
2 Open or short circuit in wire harness.
3 Defective gear position sensor.
4 Gear position setting
Fault code No. Sh_ _22
Order Item/components and probable
cause
1 Connections
• Wire harness MCU (motor control
unit) coupler
• Foot shift switch coupler
2 Open or short circuit in wire harness
and/or sub-lead 2.
3 Defective foot shift switch.
YCC-S (Yamaha Chip Controlled-Shift) SYSTEM
Symptom
Symptom
– 108 –
Output signal of gear position sensor is abnor-
mal.
Check or maintenance job
• Check the coupler for any pins
that may be pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler se-
curely.
• Repair or replace if there is an
open or short circuit.
• Between gear position sensor
coupler and MCU (motor con-
trol unit) coupler.
(yellow–yellow)
(blue–blue)
(black/blue–black/blue)
• Adjust or replace if defective.
Refer to "ADJUSTING THE
GEAR POSITION SENSOR" on
page 50 and "CHECKING THE
GEAR POSITION SENSOR" on
page 132.
• Execute the diagnostic mode.
(Code No. Sh_ _65)
Output signal of foot shift switch is abnormal.
Check or maintenance job
• Check the coupler for any pins
that may be pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler se-
curely.
• Repair or replace if there is an
open or short circuit.
• Between foot shift switch cou-
pler and MCU (motor control
unit) coupler.
(orange/red–orange/black)
(blue–blue)
(black/blue–black/blue)
• Adjust or replace if defective.
Refer to "ADJUSTING THE
FOOT SHIFT SWITCH" on
page 60 and "CHECKING THE
FOOT SHIFT SWITCH" on
page 133.
Reinstatement
method
Repairing the
cause of the
malfunction.
Reinstatement
method
Repairing the
cause of the
malfunction.