KYMCO AHG5, Service Manual

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21. ANTI-LOCK BRAKE SYSTEM (ABS)
DT X360
21-4
Troubleshooting Outline 1.3.
The ABS indicator light lights up to alert the rider when an abnormality is detected by the
system. The service codes are stored in the ABS unit memory. The codes will not be
erased unless manually cleared. After the fault has been corrected erase the service
codes.
Even when the ABS is operating normally, the ABS indicator light may light up under the
conditions listed below. Turn the ignition switch OFF to stop the indicator light. If the scooter
runs without erasing the service codes, the light may light up again.
□ After continuous riding on a rough road.
□ 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 confirming continuity of the wiring. The
ABS parts are assembled and adjusted by the manufacturer, so there is no need to
disassemble or repair them. Replace the ABS hydraulic unit if needed.
The basic troubleshooting procedures are listed below.
□ Carry out pre-diagnosis inspections as a preliminary inspection.
□ Check wiring and connections from the ABS hydraulic unit connector to the suspected
ABS part, using the diagnosis tool.
Special tool - Diagnosis tester: 3620A-LEB2-E00
□ Visually inspect the wiring for signs of burning or fraying. If any wiring is poor, replace the
damaged wiring.
□ Pull each connector 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.