Yamaha 2007 XP500 Service Manual page 407

5. Hydraulic unit solenoid coupler terminal
Check if the front and rear hydraulic unit solenoid coupler terminals (hydraulic unit and wire harness
G
[ABS]) 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" on page 8-95.)
Malfunction code 51 (Front wheel will not recover from the locking tendency even though the
signal is continuously transmitted from the ECU (ABS) to release the hydraulic state [when
the battery voltage is low].))
Check the following:
1. Rotation of the front wheel
Refer to "Malfunction code 41".
2. Brake master cylinder and brake caliper
Refer to "Malfunction code 41".
3. Brake fluid
Refer to "Malfunction code 41".
4. Brake hose lines
Refer to "Malfunction code 41".
5. Hydraulic unit solenoid coupler terminals
Refer to "Malfunction code 41".
6. Hydraulic unit
Refer to "Malfunction code 41".
7. Battery voltage
Measure the battery voltage.
Malfunction code 52 (Rear wheel will not recover from the locking tendency even though the
signal is continuously transmitted from the ECU (ABS) to release the hydraulic state [when
the battery voltage is low].)
Check the following:
1. Rotation of the rear wheel
Refer to "Malfunction code 42".
2. Brake master cylinder and brake caliper
Refer to "Malfunction code 42".
3. Brake fluid
Refer to "Malfunction code 42".
ABS (ANTI-LOCK BRAKE SYSTEM) (XP500A)
Solenoid side
Red, green
Red, white
8-92
1
2
Terminal color
Wire harness side (ABS)
Red, white
Red, green