Yamaha FJR13AY 2009 Service Manual page 642

Fault code No. AbS_42
Order Item/components and probable
cause
5 Hydraulic unit assembly
EWA3P6D007
WARNING
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
TIP
• 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 "[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 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.
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
hose, brake pipe, and coupler
correctly and securely. Check the
hydraulic unit operation.
Refer to "HYDRAULIC UNIT OP-
ERATION TESTS" on page 4-66.
8-159
Reinstatement
confirmation
method