Yamaha 2014 MT-07 Service Manual page 451

Fault code No.
Item
5 Defective sidestand switch.
6 Malfunction in ECU.
Fault code No. 21
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
Procedure
Probable cause of malfunc-
Item
tion and check
1 Connection of coolant tempera-
ture sensor 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).
19
Sidestand switch: a break or disconnection of the black/red lead of
the ECU is detected.
Execute the diagnostic mode.
(Code No. 20)
Shift the transmission into gear.
Sidestand retracted: "ON"
Sidestand extended: "OFF"
Replace if defective.
Replace the ECU.
Refer to "REPLACING THE
ECU (engine control unit)" on
page 8-128.
21
Coolant temperature sensor: open or short circuit detected.
Able to start engine
Able to drive vehicle
06
Displays the coolant temperature.
Compare the actually measured coolant temperature with the meter dis-
play value.
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.
8-46
FUEL INJECTION SYSTEM
Turn the main switch to "ON",
and then extend and retract the
sidestand.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 6.
Confirmation of service com-
Turn the main switch to "ON".
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 2.
Turn the main switch to "ON".
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 3.
pletion