Yamaha FZ1-N Service Manual page 378

Fault code No.
Diagnostic code No.
Item/components and probable
Order
Installed condition of throttle position
sensor.
1
Defective throttle position sensor.
2
Fault code No.
Diagnostic code No.
Item/components and probable
Order
Connections
• EXUP servo motor coupler
• Main wire harness ECU coupler
1
Open or short circuit in wire harness.
2
Defective EXUP servo motor (poten-
tion circuit).
3
16 Symptom
01
cause
17 Symptom EXUP servo motor circuit:open or short circuit detected.
53
cause
FUEL INJECTION SYSTEM
Stuck throttle position sensor detected.
Throttle position sensor
Check or maintenance job
• Check the installed area for
looseness or pinching.
• Check that is installed in the
specified position.
Refer to "THROTTLE BODIES"
on page 7-4 section.
• Execute the diagnostic mode.
(Code No.01)
• Replace if defective.
Refer to "THROTTLE BODIES"
on page 7-4 section.
EXUP servo motor
Check or maintenance job
• Check the couplers for any pins
that may be pulled out.
• Check the locking condition of
the couplers.
• If there is a malfunction, repair it
and connect the coupler
securely.
• Repair or replace if there is an
open or short circuit.
• Between EXUP servo motor
coupler and ECU coupler
(Blue–Blue)
(White/Red–White/Red)
(Black/Blue–Black/Blue)
• Execute the diagnostic mode.
(Code No.53)
• Replace if defective.
Refer to "CHECKING THE
EXUP SERVO MOTOR" on
page 3-18.
8-54
Reinstatement
method
Reinstated by
starting the
engine, operat-
ing it at idle, and
then racing it.
Reinstatement
method
Turning the
main switch to
"ON".