Before Starting Troubleshooting; Summary Of Abs Pre-Start Self-Diagnosis System; Pre-Start Self-Diagnosis Procedure - Honda GL1800 Service Manual

BRAKE SYSTEM (ABS)

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 speed is approximately 10 km/h (6 mph) or more, the wheel speed sensor signal is sent to the ABS con-
trol unit (ECU), then the ABS pre-start self-diagnosis system operates the control motor on the modulator, checks the crank
angle condition with the ABS control unit and thus detects whether the modulator operation is normal, and it completes
the pre-start self-diagnosis.
When the ABS is normal, the ABS indicator goes off just after a road speed of 10 km/h (6 mph) indicating that the diagnosis
is completed.
If a 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 indicator blinks when a problem is detected.
When the indicator blinks, the cause of the problem can be identified by retrieving the problem code, follow the specified
retrieval procedure (page 16-6).
PRE-START SELF-DIAGNOSIS PROCEDURE (Daily check)
1. Turn the ignition switch to "ON."
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) (pre-start self-diagnosis
completed).
5. The ABS is normal if the ABS indicator goes off.
16-5