Yamaha YZFR6X(C) 2008 Service Manual page 388

Fault code No. 42
Diagnostic code No.
Item/components and probable
Order
cause
B-1 Installed state of neutral switch.
B-2 Connections
• Neutral switch coupler
• Main wire harness ECU coupler
B-3 Open circuit in neutral switch lead.
B-4 Defective neutral switch.
B-5 Faulty shift drum (neutral detection
area).
A. No normal signals are received from the speed sensor.
Symptom
B. Open circuit is detected in the neutral switch.
A 07 Speed sensor
B 21 Neutral switch
Check or maintenance job
Check for looseness or pinching. Starting the
• Check the couplers for any pins
• Check the locking condition of
• If there is a malfunction, repair
• Repair or replace if there is an
• Between neutral switch coupler
• Between relay unit coupler and
• Execute the diagnostic mode.
• Replace if defective.
• Replace if defective.
8-65
FUEL INJECTION SYSTEM
that may be pulled out.
the couplers.
it and connect the coupler
securely.
open circuit.
and relay unit coupler.
(sky blue–sky blue)
ECU coupler.
(blue/yellow–blue/yellow)
(Code No. 21)
Refer to "CHECKING THE
SWITCHES" on page 8-81.
Refer to "TRANSMISSION" on
page 5-69.
Reinstatement
method
engine, and
activating the
speed sensor
by operating the
vehicle.