Yamaha FZ1-N Service Manual page 379

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
3
Defective EXUP valve, pulley, and
4
cables
Fault code No.
Diagnostic code No.
Item/components and probable
Order
Connections
• Main wire harness ECU coupler
1
Open or short circuit in wire harness
or sub lead.
2
Defective sidestand switch
3
18 Symptom
53
cause
Open circuit is detected in the input line of ECU No.24 ter-
19 Symptom
20
cause
FUEL INJECTION SYSTEM
EXUP servo motor is stuck.
EXUP servo motor
Check or maintenance job
• Check the couplers for any pins
that may be pulled out.
• Check the locking condition of
the coupler.
• 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.
(Black/Green–Black/Green)
(Black/Red–Black/Red)
• Execute the diagnostic mode.
(Code No.53)
• Replace if defective.
Refer to "CHECKING THE
EXUP SERVO MOTOR" on
page 3-18.
Replace if defective.
minal is difected when the start switch is pressed.
Sidestand switch
Check or maintenance job
• Execute the diagnostic mode.
(Code No.20)
• Check the coupler for any pins
that may be pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler
securely.
• Repair or replace if there is an
open or short circuit.
• Between sidestand switch cou-
pler and ECU coupler
(Black–Black)
• Replace if defective.
Refer to "CHECKING THE
SWITCHES" on page 8-93.
8-55
Reinstatement
method
Turning the
main switch to
"ON".
Reinstatement
method
If the transmis-
sion is in gear,
retracting the
sidestand.
If the transmis-
sion is in neu-
tral,
reconnecting
the wiring.