Yamaha 2014 MT-07 Service Manual page 459

Fault code No.
Item
A-1 Locate the malfunction.
A-2 Incorrect rear wheel sensor sig-
nal.
A-3 Throttle valve does not fully
close.
A-4 ISC valve is not moving correct-
ly.
A-5 Malfunction in ECU.
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Actuation
Procedure
Probable cause of malfunc-
Item
tion and check
37
Component other than ISC (idle speed control) unit is defec-
A
tive (ISC operating sound is heard).
Defective ISC (idle speed control) unit (ISC operating sound is
B
not heard).
Execute the diagnostic mode.
(Code No. 54)
Fully closes the ISC (idle speed
control) valve, and then fully
opens the valve.
Check the rear wheel sensor.
Execute the diagnostic mode.
(Code No. 07)
Rotate the rear wheel by hand
and check that the indicated val-
ue increases.
Value does not increase → Go
to fault code No. 42.
Check the throttle body assem-
bly.
Refer to "THROTTLE BODIES"
on page 7-9
Check the throttle grip free play.
Refer to "CHECKING THE
THROTTLE GRIP OPERA-
TION" on page 3-27.
Replace the ISC valve.
Replace the ECU.
Refer to "REPLACING THE
ECU (engine control unit)" on
page 8-128.
37
Component other than ISC (idle speed control) unit is defec-
A
tive (ISC operating sound is heard).
Defective ISC (idle speed control) unit (ISC operating sound is
B
not heard).
Able to start engine
Able to drive vehicle
54
Fully closes the ISC valve, and then opens the valve. This operation is
performed 3 times and takes approximately 6 seconds each time. The
"CHECK" indicator and "
comes on during the operation.
The ISC unit vibrates when the ISC valve operates.
Maintenance job
8-54
FUEL INJECTION SYSTEM
ISC operating sound is heard →
Go to item A-2.
ISC operating sound is not
heard → Go to item B-2 for the
defective ISC (idle speed con-
trol) unit.
Start the engine and let it idle for
approximately 10 seconds.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item A-3.
Start the engine and let it idle for
approximately 10 seconds.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item A-4.
Start the engine and let it idle for
approximately 10 seconds.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item A-5.
" on the Yamaha diagnostic tool screen
Confirmation of service com-
pletion