Yamaha FZ1-N Service Manual page 390

Fault code No.
Diagnostic code No.
Item/components and probable
Order
Installed state of speed sensor.
A-1
Connections
• Speed sensor coupler
• Main wire harness ECU coupler
A-2
Open or short circuit in lead.
A-3
Defective speed sensor
A-4
A. No normal signals are received from the speed sen-
42 Symptom
A 07
B 21
cause
FUEL INJECTION SYSTEM
B. Open circuit is detected in the neutral switch.
Speed sensor
Neutral switch
Check or maintenance job
• Check for looseness or pinch-
ing.
• 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 speed sensor coupler
and ECU coupler.
(Blue–Blue)
(White/Yellow–White/Yellow)
(Black/Blue–Black/Blue)
• Execute the diagnostic mode.
(Code No.07)
• Replace if defective.
Refer to "CHECKING THE
SPEED SENSOR" on page 8-
107.
8-66
sor.
Reinstatement
Starting the
engine, and
activating the
speed sensor
by operating the
vehicle at 20 to
30 km/h.
method