Yamaha FJR13AG Service Manual page 688

Fault code No. ABS_41
EWA17490
WARNING
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 8-220 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 8-220 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 8-220 is performed.
Fault code No. ABS_41
Order Item/components and probable cause
1 Rotation of wheel
2 Brake master cylinder and brake caliper
3 Brake fluid
ABS (ANTI-LOCK BRAKE SYSTEM)
Symptom Front wheel will not recover from the locking tenden-
cy even though the signal is continuously transmit-
ted from the ABS ECU to release the hydraulic
pressure (when the battery voltage is normal)
Check or maintenance job
• Check that there is no brake disc drag on the front
wheel and make sure that it rotates smoothly.
• Check the front wheel axle for loose bearings and
bends, and the brake discs for distortion.
Refer to "CHECKING THE FRONT BRAKE DISCS" on
page 4-53.
• Check that the brake fluid pressure is correctly trans-
mitted to the brake calipers when the brake lever is op-
erated and that the pressure decreases when the lever
is released.
• Visually check the brake fluid in the brake master cylin-
der reservoir and the brake fluid reservoir for water,
foreign materials, solidification, and contamination.
• Check for air in the brake lines.
8-211