Honda SH300 2006 Manual page 401

BEFORE STARTING TROUBLESHOOTING
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 problematic part can be detected by outputting the problem code.
When the vehicle is running, pulse signals generated at the front/rear wheel speed sensor are sent to the ABS control unit.
When the ABS control unit detects that vehicle speed goes to 6 km/h (4 mph), the pump motor is temporarily operated to
check if the ABS system functions normally. If the system is normal, pre-start self-diagnosis is complete by when the vehi-
cle speed goes to 10 km/h (6 mph) approximately.
If the ABS indicator blinks, because problem is detected during the pre-start self-diagnosis, See page 18-10.
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 procedure is complete, the ABS indicator may be faulty. Follow the troubleshooting (page 18-11).
ON
IGNITION
SWITCH
OFF
Running
ENGINE
Stop
VEHICLE
0
SPEED
ON
PUMP
MOTOR
OFF
ON
ABS
INDICATOR
OFF
PRE-START SELF-DIAGNOSIS PROCEDURE
1. Turn the ignition switch "ON" and engine stop switch to " ".
2. Make sure the ABS indicator comes on.
3. Start the engine.
4. Ride the scooter and increase the vehicle speed to approximately 10
km/h (6 mph).
5. The ABS is normal if the ABS indicator goes off.
ANTI-LOCK BRAKE SYSTEM (ABS; SH300A/AII/AIII)
Pre-start self-diagnosis when normal:
10 km/h (6 mph) or above, pre-start self-diagnosis completes
6 km/h (4 mph) or above
ABS INDICATOR
18-7