Yamaha FJR1300AS(X) Service Manual page 571

Fault code No. 42
Diagnostic code No.
Order Item/components and probable
cause
B-1 Connections
• Gear position switch coupler
(FJR1300A)
• Neutral switch coupler (FJR1300AS)
• Wire harness ECU coupler
• Relay unit coupler
B-2 Open or short circuit in wire harness.
B-3 Faulty shift drum (neutral detection ar-
ea)
B-4 Defective gear position switch (neutral
circuit) (FJR1300A)
Defective neutral switch (FJR1300AS)
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. (FJR1300A)
Open or short circuit is detected in the neutral switch.
(FJR1300AS)
A d:07 Rear wheel sensor
B d:21 Gear position switch (neutral circuit) (FJR1300A)
Neutral switch (FJR1300AS)
FUEL INJECTION SYSTEM
Check or maintenance job
• 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) (FJR1300A)
• Between neutral switch coupler
and relay unit coupler.
(sky blue–sky blue)
(FJR1300AS)
• Between relay unit coupler and
ECU coupler.
(black/red–black/red)
• Between neutral switch coupler
and ECU coupler.
(sky blue–sky blue)
(FJR1300AS)
• Replace if defective.
Refer to "TRANSMISSION" on
page 5-120.
• Execute the diagnostic mode.
(Code No.d:21)
• Replace if defective.
Refer to "CHECKING THE
SWITCHES" on page 8-233.
8-94
Reinstatement
method
Starting the en-
gine, and input-
ting the vehicle
speed signals
by operating
the vehicle at a
20 to 30 km/h.