Yamaha VMAX 2009 Service Manual page 546

Fault code No. ABS-42
ABS-47
Order Item/components and probable
cause
1 Rotation of wheel
2 Brake master cylinder and brake cali-
per
3 Brake fluid
4 Brake lines
ABS (ANTI-LOCK BRAKE SYSTEM)
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-
Check or maintenance job
• 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
4-47.
• Check that the brake fluid pres-
sure is correctly transmitted to
the brake caliper when the
brake pedal is operated and
that the pressure decreases
when the pedal is released.
• Visually check the brake fluid in
the brake fluid reservoir for wa-
ter, foreign materials, solidifica-
tion, and contamination.
• Check for air in the brake lines.
• Check the brake lines for kinks
and deterioration (particularly
between the hydraulic unit and
the rear brake caliper).
EWA2S31023
WARNING
Only use genuine Yamaha
parts. Using other brake pipes,
hoses and union bolts may
close the brake lines.
• Check that the connections of
the brake lines from the brake
master cylinder to the hydraulic
unit are correct.
See WARNING and TIP.
8-113
draulic pressure.
Reinstatement
confirmation
method
Perform hy-
draulic unit op-
eration test 1
and check that
the operation of
the hydraulic
unit is normal.
2
1