Yamaha XSR MTM690 2016 Service Manual page 511

Fault code No. 41
Fault code No.
Item
Symptom
Order Item/components and probable cause
1 Incorrect installation of the front wheel
sensor
2 Incorrect rotation of the front wheel
3 Front brake dragging
4 Defective hydraulic unit assembly
ABS (ANTI-LOCK BRAKE SYSTEM)
41
Front wheel ABS (intermittent wheel speed pulses or incorrect de-
pressurization)
• Pulses from the front wheel sensor are received intermittently while
the vehicle is traveling.
• Front wheel will not recover from the locking tendency even though
the signal is transmitted from the ABS ECU to reduce the hydraulic
pressure.
Check or maintenance job
Check the components for looseness, distortion, and
bends.
Refer to "CHECKING THE FRONT WHEEL" on page
4-14.
Check that there is no brake disc drag on the front wheel
and make sure that it rotates smoothly.
Refer to "CHECKING THE FRONT WHEEL" on page
4-14 and "CHECKING THE FRONT BRAKE DISCS" on
page 4-35.
Check that the brake fluid pressure is correctly transmit-
ted to the brake caliper when the brake lever is operated
and that the pressure decreases when the lever is re-
leased.
Refer to "CHECKING THE FRONT BRAKE DISCS" on
page 4-35.
If the above items were performed and no malfunctions
were found, replace the hydraulic unit assembly.
Refer to "ABS (ANTI-LOCK BRAKE SYSTEM)" on page
4-56.
8-140