Yamaha MTN1000 2016 Service Manual page 547

Fault code No.
Item
A-6 Check the fuse. (main fuse, sig-
naling system fuse, brake light
fuse)
A-7 Wire harness continuity.
A-8 Defective front brake light
switch.
A-9 Malfunction in ECU.
A-10 Delete the fault code and check
that the engine trouble warning
light goes off.
P056C
A Front brake light switch: open or short circuit is detected.
B Rear brake light switch: open or short circuit is detected.
Abnormality  Replace the
fuse. (main fuse, signaling sys-
tem fuse, brake light fuse)
Open or short circuit  Replace
the wire harness.
Between battery and main
switch coupler.
red–red
Between main switch coupler
and front brake light switch cou-
pler.
brown/blue–green/white
Between front brake light switch
coupler and brake light relay
coupler.
green/yellow–light green/black
Between brake light relay cou-
pler and ECU coupler.
light green/black–light
green/black
Between brake light relay cou-
pler and battery.
black–black
Replace the front brake light
switch.
Replace the ECU.
Refer to "REPLACING THE
ECU (Engine Control Unit)" on
page 8-194.
Confirm that the fault code has
a condition of "Recovered"
using the Yamaha diagnostic
tool, and then delete the fault
code.
8-130
CRUISE CONTROL SYSTEM
Turn the main switch to "ON".
Operate the brake lever, and
then check the condition of the
fault code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is "Recovered"  Go
to item A-10 and finish the ser-
vice.
Condition is "Detected"  Go to
item A-7.
Turn the main switch to "ON".
Operate the brake lever, and
then check the condition of the
fault code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is "Recovered"  Go
to item A-10 and finish the ser-
vice.
Condition is "Detected"  Go to
item A-8.
Turn the main switch to "ON".
Operate the brake lever, and
then check the condition of the
fault code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is "Recovered"  Go
to item A-10 and finish the ser-
vice.
Condition is "Detected"  Go to
item A-9.