Yamaha MT-09 2021 - Abs Troubleshooting Outline; Maintenance of the Abs Ecu

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ABS (Anti-lock Brake System)
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MAINTENANCE OF THE ABS ECU
Checking the ABS ECU
1. Check:
• Terminals “1” of the hydraulic unit assembly (ABS ECU)
Cracks/damages → Replace the hydraulic unit assembly, brake hoses, and brake pipes that are
connected to the assembly as a set.
• Terminals “2” of the ABS ECU coupler
Connection defective, contaminated, come-off → Correct or clean.
TIP
If the ABS ECU coupler is clogged with mud or dirt, clean with compressed air.
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ABS TROUBLESHOOTING OUTLINE
WARNING
EWA16710
When maintenance or checks have been performed on components related to the ABS, be sure
to perform a final check before delivering the vehicle to the customer.
TIP
To final check, refer to “[C-1] FINAL CHECK” on page 9-47.
ABS operation when the ABS warning light comes on
1. The ABS warning light remains on → ABS operates as a normal brake system.
• A malfunction was detected using the ABS self-diagnosis function.
• The ABS self-diagnosis has not been completed.
The ABS self-diagnosis starts when the main switch is turned to “ON” and finishes when the vehicle
has traveled at a speed of approximately 10 km/h (6 mi/h).
2. The ABS warning light comes on after the engine starts, and then goes off when the vehicle starts
moving (traveling at a speed of approximately 10 km/h (6 mi/h)). → ABS operation is normal.
3. The ABS warning light flashes → ABS operation is normal.
• Refer to “[C-1] FINAL CHECK” on page 9-47.
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