Yamaha FJR1300A(D), Service Manual, Page: 600 / 662

ABS (ANTI-LOCK BRAKE SYSTEM)
8-151
WARNING
EWA3P6D006
The front brakes will not function properly if the connections are reversed.
• Brake pipe/lower joint assembly “1” and brake pipe “2” inlet: from the front brake master cyl-
inder
• Brake pipe/upper joint assembly “3” and brake pipe “4” outlet: to the front brake calipers
• Brake pipe “5” outlet: to the metering valve
• Brake pipe “6” outlet: to the right front brake caliper
TIP
• If the brake pipe inlet and outlet connections are incorrect on the hydraulic unit, the brake lever will be
pulled to its full-stroke position without responding, and then it will be pushed back slowly without pul-
sating when the final check on page “[C-3] FINAL CHECK” on page 8-160 is performed.
• If the front and rear brake pipe connections are reversed on the hydraulic unit, the pulsating action in
the brake lever and brake pedal will be performed in the reverse order when the final check on page
“[C-3] FINAL CHECK” on page 8-160 is performed.
• If the brake pipes (to the proportioning valve and the metering valve) are switched during assembly,
the brakes will continue to operate as normal. However, the reduction of the hydraulic pressure for the
rear brake and part of the right front brake will be reversed during the ABS operation when the final
check on page “[C-3] FINAL CHECK” on page 8-160 is performed.
Fault code No. ABS_42
ABS_47 Symptom Rear wheel will not recover from the locking ten-
dency even though the signal is continuously
transmitted from the ABS ECU to release the hy-
draulic pressure.
Order Item/components and probable
cause
Check or maintenance job
1 Rotation of wheel • Check that there is no brake disc drag on the rear
wheel and make sure that it rotates smoothly.
• Check for brake disc distortion.
Refer to “CHECKING THE REAR BRAKE DISC”
on page 4-56.
2 Brake master cylinder and brake cali-
per • Check that the brake fluid pressure is correctly
transmitted to the brake caliper when the brake
pedal is operated and that the pressure decreas-
es when the pedal is released.
3 Brake fluid • Visually check the brake fluid in the brake fluid
reservoir for water, foreign materials, solidifica-
tion, and contamination.
• Check for air in the brake lines.