Yamaha XP500 Service Manual page 297

ABS self-diagnosis by the ECU (ABS)
The ECU (ABS) performs a static check on the ABS when the main switch is set to "ON". The ECU
(ABS) also monitors the ABS while riding the vehicle and checks for malfunctions. If malfunctions
occur, the malfunction codes are stored in the memory of the ECU (ABS). The malfunction codes
can be recalled from the memory using the ABS self-diagnostic function of the ECU (ABS) and a
pocket tester or the multifunction display.
3. Handling and service
CAUTION:
Handling the ABS components with care since they have been accurately adjusted. Keep
them away from dirt and do not subject them to shocks.
• The ECU (ABS), hydraulic unit, wheel sensors, and fail-safe relay cannot be disassembled.
• Always delete the malfunction codes stored in the memory of the ECU (ABS) after service has
been completed.
EAS00885
Basic troubleshooting instructions
WARNING
_
• Perform the troubleshooting [A] → [B] → [C] → [D] in order. The malfunction will not be
diagnosed correctly if the troubleshooting is performed in the wrong order or if the steps
are omitted.
• Make sure that the battery has been sufficiently charged before troubleshooting.
[A] ABS malfunction check using the ABS warning light
[B] Detailed ABS malfunction check
The results of the self-diagnosis by the ECU (ABS) are displayed using the multifunction display
or a pocket tester.
[C] Determining the cause and location of the malfunction
Determine the cause of the malfunction from the condition and place where the malfunction
occurred.
[D] ABS maintenance
Execute the final check after disassembly and reassembly.
ANTI-LOCK BRAKE SYSTEM (XP500A)
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CHAS