Anti-Lock Brake System (Equipped Models)
ABS Troubleshooting Outline
When an abnormality in the system occurs, the ABS in-
dicator light (LED) lights up to alert the rider. In addition,
the nature of the fault is stored in the memory of the ABS
hydraulic unit and when in the self-diagnosis mode, the ser-
vice code [A] is indicated by the number of times the ABS
indicator light (LED) blinks. The service codes stored in
memory are not erased until the mode has been changed
to the fault erase mode after the fault has been corrected.
Therefore, after correcting the problem, always erase the
service codes and then run the self-diagnosis program to
confirm normal signal output. When, due to a malfunction,
the ABS indicator light (LED) remains lit, get a thorough
understanding of the background before starting the repair
work. Ask the rider about the conditions [B] under which
the problem occurred and try to determine the cause [C].
Do not rely solely on the ABS self-diagnosis function, use
common sense; check the brakes for proper braking power,
and brake fluid level, search for leaks, etc.
Even when the ABS is operating normally, the ABS indi-
cator light (LED) may light up under the conditions listed be-
low. Turn the ignition switch OFF to stop the indicator light.
If the motorcycle runs without erasing the service code, the
light may light up again.
After continuous riding on a rough road.
When the engine is started with the stand raised and the
transmission engaged, and the rear wheel turns.
When accelerating so abruptly that the front wheel leaves
When the ABS has been subjected to strong electrical
When tire pressure is abnormal. Adjust tire pressure.
When a tire different in size from the standard size is being
used. Replace with standard size.
When the wheel is deformed. Replace the wheel.
Much of the ABS troubleshooting work consists of con-
firming continuity of the wiring. The ABS parts are assem-
bled and adjusted by the manufacturer, so there is no need
to disassemble or repair them. Replace the ABS hydraulic
The basic troubleshooting procedures are listed below.
Carry out pre-diagnosis inspections as a preliminary in-
Determine the fault using the self-diagnosis function.
Check wiring and connections from the ABS hydraulic
unit connector to the suspected faulty ABS part, using the
Special Tool - Hand Tester: 57001-1394
manuals search engine