Honda CBR650RA Shop Manual page 422

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ANTI-LOCK BRAKE SYSTEM (ABS)
ABS TROUBLESHOOTING INFORMATION
SYSTEM DESCRIPTION
SUMMARY OF ABS PRE-START SELF-DIAGNOSIS SYSTEM
The ABS pre-start self-diagnosis system diagnoses the electrical system as well as the operating status of the modulator. When
there is any abnormality, the problem and the associated part can be detected by reading the DTC.
When the motorcycle is running, pulse signals generated at the front and rear wheel speed sensors are sent to the ABS control unit.
When the vehicle speed reaches approximately 6 km/h (4 mph), the ABS control unit operates the pump motor to check it. When
the vehicle speed reaches 10 km/h (6 mph), the ABS control unit turns off the ABS indicator if the system is normal and the pre-start
self-diagnosis is completed.
If any problem is detected, the ABS indicator blinks or comes on and stays on to notify the rider of the problem. The self-diagnosis
is also made while the motorcycle is running, and the ABS indicator blinks when a problem is detected.
When the ABS indicator blinks, the cause of the problem can be identified by reading the DTC (page 19-7).
If the ABS indicator does not come on when the ignition switch is turned ON, or the ABS indicator stays on after the pre-start self-
diagnosis is completed although the ABS system is normal, the ABS indicator circuit may be faulty. Follow the troubleshooting
(page 19-14).
Pre-start serf-diagnosis when the system is normal:
ON
IGNITION
SWITCH
OFF
Running
ENGINE
Stop
VEHICLE
0
SPEED
ON
PUMP
MOTOR
OFF
ON
ABS
INDICATOR
OFF
PRE-START SELF-DIAGNOSIS PROCEDURE (Daily check)
1. Turn the ignition switch ON with the engine stop switch " ".
2. Make sure the ABS indicator comes on.
3. Start the engine.
4. Ride the motorcycle and increase the vehicle speed to approximately 10 km/h (6 mph).
5. The ABS is normal if the ABS indicator goes off.
19-6
Start
6 km/h (4 mph) or above
Pre-start serf-diagnosis is
completed at 10 km/h (6 mph)