Yamaha XP500 Service Manual page 312

• Check that the connections of the brake hose lines from the brake master cylinder to the hydrau-
lic unit and to the rear brake caliper from the hydraulic unit are correct.
WARNING
_
The rear brake will not function properly if the connections are reversed.
• Rear brake hose 1 inlet: from the rear brake master cylinder
• Rear brake hose 2 outlet: to the rear brake caliper
NOTE:
_
• If the rear brake hose inlet and outlet connections are reversed on the hydraulic unit, the brake
lever is pulled to full stroke without responding and will be pushed back slowly without pulsating
when the final check in [D-6] is performed.
• If the front and rear brake hose connections are reversed on the hydraulic unit, the pulsating
action in the brake levers will be performed in the reverse order when the final check in [D-6] is
performed.
5) Hydraulic unit solenoid coupler terminal
• Check if the front and rear hydraulic unit solenoid coupler terminals (hydraulic unit and wire har-
ness (ABS system circuit)) are reversed.
Front
Rear
6) Hydraulic unit
If the malfunction is not corrected after performing steps 1) to 5), replace the hydraulic unit. Be sure
to connect the brake hose lines and couplers correctly and securely. Check the hydraulic unit oper-
ation. (Refer to "[D-6] Final check".)
ANTI-LOCK BRAKE SYSTEM (XP500A)
1
2
Terminal color
Solenoid
red, green
red, white
Wire harness (ABS sys-
tem circuit)
red, white
red, green
4 - 114
CHAS