Yamaha XP500, Руководство по обслуживанию

Страница: 311 / 559

4 - 113
CHAS
ANTI-LOCK BRAKE SYSTEM (XP500A)
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.
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 hoses and couplers correctly and securely. Check the hydraulic unit operation.
(Refer to “[D-6] Final check”.)
• [C-5-11] Malfunction code 42 (Rear wheel does not recover from the locking tendency even
though the signal is continuously transmitted from the ECU (ABS) to release the hydraulic
pressure [when the battery voltage is normal].)
Check the following:
1) Rotation of the rear wheel
• Check that there is no brake drag on the rear wheel and make sure it rotates smoothly.
• Check for brake disc distortion.
2) Brake master cylinder and brake caliper
• Check that the brake fluid pressure is correctly transmitted to the brake disc when the brake lever
is operated and that the pressure decreases when the lever is released.
3) Brake fluid
• Visually check the brake fluid in the brake master cylinder reservoir and check the fluid for water,
foreign materials, solidification and contamination.
• Check for air in the brake hose lines.
4) Brake hose lines
• Check the brake hose lines for kinks and deterioration (particularly between the hydraulic unit
and the rear brake caliper).
WARNING
_
Only use genuine Yamaha parts. Using other brake pipes, hoses and union bolts may close
the brake hose lines.
Terminal color
Solenoid
Wire harness (ABS sys-
tem circuit)
Front red, green red, white
Rear red, white red, green