Yamaha FZ1-N Service Manual page 396

Fault code No.
Diagnostic code No.
Item/components and probable
Order
Connections
• Sub-throttle servo motor coupler
• Main wire harness ECU coupler
1
Open or short circuit in wire harness.
2
Defective sub-throttle servo motor
3
Fault code No.
Diagnostic code No.
Item/components and probable
Order
Malfunction in ECU.
1
48 Symptom
56
cause
Faulty ECU memory. (When this malfunction is detected
50 Symptom in the ECU, the fault code number might not appear on
—
cause
FUEL INJECTION SYSTEM
Sub-throttle servo motor:stuck.
Sub-throttle 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 sub-throttle servo
motor coupler and ECU coupler
(Yellow/Red–Yellow/Red)
(Yellow/White–Yellow/White)
• Execute the diagnostic mode.
(Code No. 56)
• Replace if defective.
Refer to "CHECKING THE
SUB-THROTTLE SERVO
MOTOR" on page 7-10.
the meter.)
Check or maintenance job
Replace the ECU.
NOTE:
Do not perform this procedure
with the main switch turned to
"ON".
8-72
Reinstatement
Turning the
main switch to
"ON".
—
Reinstatement
Turning the
main switch to
"ON"
method
method