Yamaha 2012 TMAX XP500A Service Manual page 482

Fault code No. ABS_33
Item/components and probable
Order
cause
3 Connections
• ABS ECU coupler
• Starter relay coupler
4 Open or short circuit in wire har-
ness.
5 Hydraulic unit assembly internal
malfunction.
Fault code No. ABS_34
Item/components and probable
Order
cause
1 Short circuit in ABS motor relay.
Fault code No. ABS_41
Item/components and probable
Order
cause
1 Rotation of wheel
2 Brake master cylinder and brake
caliper
3 Brake fluid
ABS (ANTI-LOCK BRAKE SYSTEM)
ABS motor is defective.
Symptom
Power is not supplied to the ABS motor.
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 securely.
TIP
Set the main switch to "OFF" before disconnecting or
connecting a coupler.
• Repair or replace if there is an open or short circuit.
• Between ABS ECU coupler and ABS motor fuse.
(Red/blue–Red/blue)
• Between ABS ECU coupler and ground.
(Black/white–Black/white)
Replace the hydraulic unit assembly.
Symptom Hydraulic unit ABS motor relay is short-circuited.
Check or maintenance job
Replace the hydraulic unit assembly.
Front wheel will not recover from wheel lock even
though the signal is continuously transmitted
Symptom from the ABS ECU and the hydraulic pressure
has been released (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 4-42.
• Check that the brake fluid pressure is correctly
transmitted to the brake calipers when the front
brake lever is operated and that the pressure
decreases when the lever is released.
• Visually check the brake fluid in the brake master
cylinder reservoir for water, foreign materials, solidi-
fication, and contamination.
• Check for air in the brake lines.
8-107