Yamaha 2007 FZ6-NA Service Manual page 473

Malfunction code 51 (Front wheel will not recover from the locking tendency even though the
signal is continuously transmitted from the ABS ECU 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 ABS ECU 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".
4. Brake hose lines
Refer to "Malfunction code 42".
5. Hydraulic unit solenoid coupler terminals
Refer to "Malfunction code 42".
6. Hydraulic unit
Refer to "Malfunction code 42".
7. Battery voltage
Measure the battery voltage.
ABS (ANTI-LOCK BRAKE SYSTEM)
8-100