Maintenance Of The Abs Ecu; Checking The Abs Ecu; Abs Troubleshooting Outline; Abs Operation When The Abs Warning Light Comes On - Yamaha 2012 TMAX XP500A Service Manual

EAS27770

MAINTENANCE OF THE ABS ECU

Checking the ABS ECU

1. Check:
• Terminals "1" of the ABS ECU
Cracks/damages → Replace the hydraulic unit assembly and the brake pipes that are con-
nected 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

This section describes the troubleshooting for the ABS in detail. Read this service manual carefully
and make sure you fully understand the information provided before repairing any malfunctions or
performing service.
The ABS ECU (electronic control unit) has a self-diagnosis function. When failures occur in the sys-
tem, the ABS warning light on the meter assembly indicates a malfunction.
The following troubleshooting describes the problem identification and service method according to
the indications by the multi-function display. For troubleshooting items other than the following items,
follow the normal service method.
EWA59C2801
WARNING
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. (Refer to "[C-3]
FINAL CHECK" on page 8-117.)

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 test is not completed.
The self-diagnosis test begins when the vehicle starts up for the first time after the main switch
was set to "ON", and is completed when the vehicle is operated at a speed of about 10 km/h
(6.3 mi/h). (Refer to "ABS warning light" on page 1-17.)
2. The ABS warning light comes on when the engine is started, and goes off when the vehicle is
operated (at a speed of about 10 km/h [6.3 mi/h]: refer to "ABS warning light" on page 1-17.) →
ABS operation is normal.
• The ABS warning light comes on while the start switch is being pushed.
3. The ABS warning light flashes → ABS operation is normal.
• Refer to "BASIC INSTRUCTIONS FOR TROUBLESHOOTING" on page 8-92.
ABS (ANTI-LOCK BRAKE SYSTEM)
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