ABS (ANTI-LOCK BRAKE SYSTEM)
8-152
EWA3P6D007
The rear brake will not function properly if the connections are reversed.
• Brake pipe/middle joint assembly “1” and brake hose “2” inlet: from the rear brake master cyl-
inder
• Brake pipe “3” outlet: to the proportioning valve
• Brake pipe “4” outlet: to the rear brake caliper
• If the brake pipe inlet and outlet connections are reversed on the hydraulic unit, the brake pedal will
be pressed down to its full-stroke position without responding, and then it will be pushed back slowly
without pulsating when the final check on page “[C-3] FINAL CHECK” on page 8-160 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 8-160 is performed.
4 Brake lines • Check the brake lines for kinks and deterioration
(particularly between the hydraulic unit and the
rear brake caliper).
EWA3P6D005
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 and from the hydraulic unit to the proportion-
ing valve are correct.
See WARNING and TIP.
5 Hydraulic unit assembly If the malfunction is not corrected after checking
items (1) to (4), replace the hydraulic unit assem-
bly. Be sure to connect the brake hose, brake pipe,
and coupler correctly and securely. Check the hy-
draulic unit operation.
Refer to “HYDRAULIC UNIT OPERATION TESTS”
on page 4-72.
Fault code No. ABS_42
ABS_47
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-
draulic pressure.
Order Item/components and probable
cause
Check or maintenance job
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