FUEL INJECTION SYSTEM
8-59
Fault code No.
42
Symptom
ANo normal signals are received from the speed sensor.
BOpen circuit is detected in the neutral switch.
Diagnostic code No.
A
07
Speed sensor
B
21
Neutral switch
Orde
r
Item/components and probable
cause
Check or maintenance job
Reinstatement
method
A-1
Installed state of speed sensor.
Check for looseness or pinching.
Starting the
engine, and
activating the
speed sensor
by operating the
vehicle.
A-2
Connections
• Speed sensor coupler
• Main wire harness ECU coupler
• 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.
A-3
Open or short circuit in lead.
• 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)
A-4
Defective speed sensor.
• Execute the diagnostic mode.
(Code No. 07)
• Replace if defective.
Refer to "CHECKING THE
SPEED SENSOR" on page 8-
99.
B-1
Installed state of neutral switch.
Check for looseness or pinching.
B-2
Connections
• Neutral switch coupler
• Main wire harness ECU coupler
• 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.
B-3
Open circuit in neutral switch lead.
• Repair or replace if there is an
open circuit.
• Between neutral switch coupler
and relay unit coupler.
(Sky blue–Sky blue)
• Between relay unit coupler and
ECU coupler.
(Blue/Yellow–Blue/Yellow)
B-4
Defective neutral switch.
• Execute the diagnostic mode.
(Code No.21)
• Replace if defective.
Refer to "CHECKING THE
SWITCHES" on page 8-85.
B-5
Faulty shift drum (neutral detection
area).
• Replace if defective.
Refer to "TRANSMISSION" on
page 5-84.
Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keys
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