Yamaha FJR1300A Service Manual page 478

Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keys
Fault code No. 42
Diagnostic code No.
Order Item/components and probable
cause
B-1 Connections
• Gear position switch coupler
• Wire harness ECU coupler
• Front cowling wire harness coupler
B-2 Open or short circuit in wire harness
and/or front cowling wire harness.
B-3 Faulty shift drum (neutral detection ar-
ea)
B-4 Defective gear position switch (neutral
circuit)
email: info@motomatrix.co.uk
Symptom A. No normal signals are received from the rear wheel
sensor.
B. Open or short circuit is detected in the neutral circuit of
the gear position switch.
A 07 Rear wheel sensor
B 21 Gear position switch (neutral circuit)
Check or maintenance job
8-75
FUEL INJECTION SYSTEM
• Check the coupler for any pins
that may be pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler se-
curely.
• Repair or replace if there is an
open or short circuit.
• Between gear position switch
coupler and relay unit coupler.
(sky blue–sky blue)
• Between relay unit coupler and
ECU coupler.
(black/yellow–black/yellow)
• Replace if defective.
Refer to "TRANSMISSION" on
page 5-94.
• Execute the diagnostic mode.
(Code No.21)
• Replace if defective.
Refer to "CHECKING THE
SWITCHES" on page 8-149.
Reinstatement
method
Starting the en-
gine, and input-
ting the vehicle
speed signals
by operating
the vehicle at a
20 to 30 km/h.