Yamaha FJR13AEV(C), Service Manual

Page: 642 / 726

YCC-S (Yamaha Chip Controlled-Shift) SYSTEM (FJR13AE only)
8-171
Checking the YCC-S indicator and warning light
The YCC-S indicator and warning light come on for 1.4 seconds after the main switch has been turned
to “ON” and they come on while the start switch is being pushed. If the YCC-S indicator and warning
light does not come on under these conditions, the warning light (LED) may be defective.
ET3P66062
SELF-DIAGNOSTIC FUNCTION TABLE
If the MCU (motor control unit) detects an abnormal signal from a sensor while the vehicle is being driv-
en, the MCU (motor control unit) lights the YCC-S indicator and warning light and provides the YCC-S
system with alternate operating instructions that are appropriate for the type of malfunction.
When an abnormal signal is received from a sensor, the MCU (motor control unit) processes the spec-
ified values that are programmed for each sensor in order to provide the YCC-S system with alternate
operating instructions that enable the system to continue operating or stop operating, depending on the
conditions.
Self-Diagnostic Function table
SHIFT
3
1
2
a b
c
c
d
a. Main switch “OFF”
b. Main switch “ON”
c. YCC-S indicator and warning light off d. YCC-S indicator and warning light on for 1.4
seconds
Fault
code No.
Symptom Malfunction detecting condition
Able/un-
able to start
Able/un-
able to
change the
shift
Sh_ _11
Too low or too high
voltage is supplied to
the YCC-S system.
Voltage is below 8 V or above 16
V.
Unable Unable
Sh_ _12
Malfunction of power
cut-off function in
MCU (motor control
unit) Faulty power source relay cut-off
function is detected during the
YCC-S system check when main
switch is turned to “ON”.
Unable Unable