Yamaha 2014 MT-07, Service Manual

Page: 450 / 564

FUEL INJECTION SYSTEM
8-45
Fault code No. 19
7 Malfunction in ECU. Replace the ECU.
Refer to “REPLACING THE
ECU (engine control unit)” on
page 8-128.
Fault code No. 15
Item Throttle position sensor: open or short circuit detected.
Fault code No. 19
Item
Sidestand switch: a break or disconnection of the black/red lead of
the ECU is detected.
Fail-safe system
Unable to start engine
Unable to drive vehicle
Diagnostic code No. 20
Meter display
Sidestand switch
• “ON” (sidestand retracted)
• “OFF” (sidestand extended)
Procedure Extend and retract the sidestand (with the transmission in gear).
Item
Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service com-
pletion
1 Connection of sidestand switch
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). Improperly connected
→
Con-
nect the coupler securely or re-
place the wire harness.
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 2.
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). Improperly connected
→
Con-
nect the coupler securely or re-
place the wire harness.
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 3.
3 Connection of relay unit 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). Improperly connected
→
Con-
nect the coupler securely or re-
place the wire harness.
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 4.
4 Wire harness continuity. Open or short circuit
→
Replace
the wire harness.
Between sidestand switch cou-
pler and relay unit coupler.
blue/green–blue/green
Between relay unit coupler and
joint coupler.
black/red–black/red
Between joint coupler and ECU
coupler.
black/red–black/red
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 5.