Fault code No. 15
TIP
Before troubleshooting, disconnect the starter motor lead from the starter relay.
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Diagnostic tool display
Procedure
Probable cause of malfunc-
Item
tion and check
1
Connection of throttle position
sensor coupler.
Check the locking condition of
the coupler.
Disconnect the coupler, and
check the pins (for bent or bro-
ken terminals and locking condi-
tion of the pins).
2
Connection of wire harness
ECU coupler.
Check the locking condition of
the coupler.
Disconnect the coupler, and
check the pins (for bent or bro-
ken terminals and locking condi-
tion of the pins).
3
Wire harness continuity.
4
Mounted condition of throttle
position sensor.
Check for looseness or pinch-
ing.
Check the mounted position for
correctness.
15
Throttle position sensor: open or short circuit detected.
Able to start engine
Able to drive vehicle
01
Displays the throttle angle.
• 11–14 (throttle in fully closed position)
• 86–92 (throttle in fully opened position)
• Check with throttle fully closed.
• Check with throttle fully opened.
Maintenance job
Improperly connected Con-
nect the coupler securely, or
repair/replace the wire harness.
Improperly connected Con-
nect the coupler securely, or
repair/replace the wire harness.
Open or short circuit Replace
the wire harness.
Between throttle position sensor
coupler and ECU coupler.
yellow–yellow
blue–blue
black/blue–black/blue
Improperly mounted sensor
Remount or replace the sensor.
Refer to "ADJUSTING THE
THROTTLE POSITION SEN-
SOR" on page 7-8.
8-37
FUEL INJECTION SYSTEM
Confirmation of service com-
pletion
Push the start switch (main
relay ON), and then check the
condition of the fault code using
the malfunction mode of the
Yamaha diagnostic tool.
Condition is "Recovered" Go
to item 8 and finish the service.
Condition is "Detected" Go to
item 2.
Push the start switch (main
relay ON), and then check the
condition of the fault code using
the malfunction mode of the
Yamaha diagnostic tool.
Condition is "Recovered" Go
to item 8 and finish the service.
Condition is "Detected" Go to
item 3.
Push the start switch (main
relay ON), and then check the
condition of the fault code using
the malfunction mode of the
Yamaha diagnostic tool.
Condition is "Recovered" Go
to item 8 and finish the service.
Condition is "Detected" Go to
item 4.
Push the start switch (main
relay ON), and then check the
condition of the fault code using
the malfunction mode of the
Yamaha diagnostic tool.
Condition is "Recovered" Go
to item 8 and finish the service.
Condition is "Detected" Go to
item 5.