Yamaha 2007 FZ6-NA Service Manual page 424

Fault code No. 42 Symptom
Diagnostic code No.
Item/components and probable
Order
Connected state of connector (with out
ABS)
• Speed sensor coupler
• Main wire harness ECU coupler
A-1 Connections (with ABS)
• Rear wheel sensor coupler
• Wire harness ECU coupler
• ABS ECU coupler
• ABS wire harness coupler
Open or short circuit in speed sensor
lead. (with out ABS)
Open or short circuit in wire harness
and/or ABS wire harness. (with ABS)
A-2
Gear for detecting vehicle speed has
broken. (with out ABS)
Sensor rotor for detecting vehicle
speed has broken.
A-3
Defective speed sensor (with out ABS)
Defective rear wheel sensor (with
ABS)
A-4
A. No normal signals are received from the rear wheel
sensor. (with ABS)
B. Open or short circuit is detected in the neutral switch.
A 07 Speed sensor
B 21 Neutral switch
cause
FUEL INJECTION SYSTEM
Check or maintenance job
• Check the coupler for any pins
that may have 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 speed sensor coupler
and ECU coupler. (with out ABS)
(Blue–Blue)
(White/Yellow–White/Yellow)
(Black/Blue–Black/Blue)
• Between rear wheel sensor
coupler and ABS ECU coupler.
(with ABS)
(Yellow/White–Yellow/White)
(Black–Black)
• Between ABS ECU coupler and
ECU coupler. (with ABS)
(White/Yellow–White/Yellow)
• Replace if defective. (with out
ABS)
Refer to "CHECKING THE
SPEED SENSOR" on page 8-
126.
• Replace the rear wheel. (with
ABS)
Refer to "REAR WHEEL" on
page 4-15.
• Execute the diagnostic mode.
(Code No.07)
• Replace if defective. (with out
ABS)
Refer to "CHECKING THE
SPEED SENSOR" on page 8-
126.
• Replace if defective. (with ABS)
Refer to "[D-4] MAINTENANCE
OF THE REAR WHEEL SEN-
SOR AND SENSOR ROTOR"
on page 4-20.
8-51
Reinstate-
ment method
Starting the
engine, and
inputting the
vehicle speed
signals by
operating the
vehicle at a 20
to 30 km/h.