Yamaha FJR1300AS(X), Service Manual

Page: 691 / 754

YCC-S (Yamaha Chip Controlled-Shift) SYSTEM (FJR1300AS
only)
8-214
NOTE:
If the main switch is turned to “OFF”, the fault code number will disappear from the display and will not
be displayed again when the main switch is turned back to “ON”. Therefore, use the engine stop switch
to stop the engine, not the main switch. If the fault code number has disappeared, activate the diagnos-
tic mode and select diagnostic code No. Sh_ _61. The fault code numbers can be confirmed in the mal-
function history.
Fault code No. Sh_ _27 Symptom Diagnosis mode is activated at engine start-up.
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 YCC-S test coupler • Check that the test coupler
adapter is not connected.
Refer to “DIAGNOSTIC MODE”
on page 8-197.
Turning the
main switch to
“OFF”.
See NOTE.
2 Short circuit in wire harness. • Repair or replace if there is a
short circuit.
• Between YCC-S test coupler
and MCU (motor control unit)
coupler.
(blue/yellow–blue/yellow)
Fault code No. Sh_ _31 Symptom Engine speed signal is abnormal.
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Connections
• Wire harness MCU (motor control
unit) coupler
• Wire harness ECU coupler
• 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.
Repairing the
cause of the
malfunction.
2 Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between ECU coupler and
MCU (motor control unit) cou-
pler.
(yellow/black–yellow/black)