Yamaha FJR13AG Service Manual page 541

Fault code No. C0520 (FJR13ESG)
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Tool display
Procedure
Probable cause of malfunc-
Item
tion and check
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 Installed condition of IMU.
C0520
ECU receives a signal from the IMU indicating that a malfunction
was detected or the ECU does not receive normal signals from the
IMU.
Able/Unable to start engine
Able/Unable to drive vehicle
—
—
—
Maintenance job
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
Check for looseness or pinch-
ing.
Check the rubber components
for deterioration.
Improperly installed sensor →
Reinstall or replace the sensor.
8-64
FUEL INJECTION SYSTEM
Confirmation of service com-
pletion
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 7 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 7 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 7 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 7 and finish the service.
Condition is "Detected" → Go to
item 5.