Service Manual — page 455 of 715

Brakes › ABS Troubleshooting Outline
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BRAKES 12-33
Anti-Lock Brake System
   Even when the ABS is operating normally, the yellow ABS
indicator light (LED) may light up under the conditions listed
below. 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
   the ground.
○When the ABS has been subjected to strong electrical
   interference.
○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
unit.
   The basic troubleshooting procedures are listed below.
•  Carry out pre-diagnosis inspections as a preliminary in-
   spection.
•  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 a digital
   meter.

• Visually inspect the wiring for signs of burning or fraying.
  If any wiring is poor, replace the damaged wiring.
• Pull each connector [A] apart and inspect it for corrosion,
  dirt and damage.
 If the connector is corroded or dirty, clean it carefully. If it
 is damaged, replace it.
•Check the wiring for continuity.
○Use the wiring diagram to find the ends of the lead which
 is suspected of being a problem.
○Connect the digital meter between the ends of the leads.
 If the digital meter does not read about 0 Ω, the lead is
 defective. Replace the main harness [B] if necessary.

• Narrow down suspicious parts and close in on the faulty
  ABS part by repeating the continuity tests.
    If no abnormality is found in the wiring or connectors, the
    ABS parts are the next likely suspects. Check each part
    one by one.
    If an abnormality is found, replace the affected ABS part.