Yamaha TMAX 2020, Service Manual

Page: 664 / 688

9-190
41_ABS
EAS20694
41_ABS
EAS33331
TROUBLESHOOTING
Item
Front wheel ABS (intermittent wheel speed pulses or incorrect depressurization)
Procedure
1. Incorrect installation of the front wheel sensor
• Check the components for looseness, distortion, and bends.
Refer to “MAINTENANCE OF THE FRONT WHEEL SENSOR AND SENSOR ROTOR” on page 4-
26.
2. Incorrect rotation of the front wheel
• Check that there is no brake disc drag on the wheel and make sure that it rotates smoothly.
Refer to “CHECKING THE FRONT WHEEL” on page 4-24 and “CHECKING THE FRONT BRAKE
DISCS” on page 4-43.
3. Front brake dragging
• Check that the brake fluid pressure is correctly transmitted to the brake caliper when the brake lever
is operated and that the pressure decreases when the lever is released.
Refer to “CHECKING THE FRONT BRAKE DISCS” on page 4-43.
4. Defective hydraulic unit assembly
• Replace the hydraulic unit assembly.
Refer to “ABS (Anti-lock Brake System)” on page 4-67.
Is check result OK?
YES

Go to step 2.
NO

Repair or replace the defective part.
Is check result OK?
YES

Go to step 3.
NO

Repair or replace the defective part.
Is check result OK?
YES

Go to step 4.
NO

Repair or replace the defective part.