Yamaha FJR13AG Service Manual page 611

Fault code No.
Item
1 Connection of IMU coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
2 Connection of ECU coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
3 Wire harness continuity.
4 Malfunction in IMU.
5 Malfunction in ECU.
6 Delete the fault code and check
that the engine trouble warning
light goes off.
U0125
Signals cannot be transmitted between the ECU and the IMU.
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Open or short circuit → Replace
the wire harness.
Between ECU coupler and joint
coupler.
blue/red–blue/red
blue/black–blue/black
Between joint coupler and IMU
coupler.
blue/red–blue/red
blue/black–blue/black
Between IMU coupler and igni-
tion fuse connector.
red/white–red/white
Between IMU coupler and
ground.
black–black
Replace the IMU.
Replace the ECU.
Refer to "REPLACING THE
ECU (engine control unit)" on
page 8-250.
Confirm that the fault code has
a condition of "Recovered" us-
ing the Yamaha diagnostic tool,
and then delete the fault code.
8-134
FUEL INJECTION SYSTEM
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the Yamaha di-
agnostic tool.
Condition is "Recovered" → Go
to item 6 and finish the service.
Condition is "Detected" → Go to
item 2.
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the Yamaha di-
agnostic tool.
Condition is "Recovered" → Go
to item 6 and finish the service.
Condition is "Detected" → Go to
item 3.
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the Yamaha di-
agnostic tool.
Condition is "Recovered" →Go
to item 6 and finish the service.
Condition is "Detected" → Go to
item 4.
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the Yamaha di-
agnostic tool.
Condition is "Recovered" → Go
to item 6 and finish the service.
Condition is "Detected" → Go to
item 5.
Service is finished.