Yamaha FJR13AY 2009 Service Manual page 640

Fault code No. AbS_41
Order Item/components and probable
cause
5 Hydraulic unit assembly
EWA3P6D006
WARNING
The front brakes will not function properly if the connections are reversed.
• Brake pipe/lower joint assembly "1" and brake pipe "2" inlet: from the front brake master cyl-
inder
• Brake pipe/upper joint assembly "3" and brake pipe "4" outlet: to the front brake calipers
• Brake pipe "5" outlet: to the metering valve
• Brake pipe "6" outlet: to the right front brake caliper
TIP
• If the brake pipe inlet and outlet connections are incorrect on the hydraulic unit, the brake lever will be
pulled to its full-stroke position without responding, and then it will be pushed back slowly without pul-
sating when the final check on page "[D-3] FINAL CHECK" on page 8-168 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
"[D-3] FINAL CHECK" on page 8-168 is performed.
• If the brake pipes (to the proportioning valve and the metering valve) are switched during assembly,
the brakes will continue to operate as normal. However, the reduction of the hydraulic pressure for the
rear brake and part of the right front brake will be reversed during the ABS operation when the final
check on page "[D-3] FINAL CHECK" on page 8-168 is performed.
ABS (ANTI-LOCK BRAKE SYSTEM)
Symptom Front wheel will not recover from the locking
tendency even though the signal is continuous-
ly transmitted from the ABS ECU to release the
hydraulic pressure (when the battery voltage is
normal)
Check or maintenance job
If the malfunction is not corrected
after checking items (1) to (4), re-
place the hydraulic unit assembly.
Be sure to connect the brake
pipes and coupler correctly and
securely. Check the hydraulic unit
operation.
Refer to "HYDRAULIC UNIT OP-
ERATION TESTS" on page 4-66.
8-157
Reinstatement
confirmation
method