Abs Warning Light; Hydraulic Unit Assembly - Yamaha 2012 TMAX XP500A Service Manual

ABS warning light

The ABS warning light "1" comes on to warn the rider if a malfunction in the ABS occurs.
When the main switch is set to "ON", the ABS warning light comes on to check the electrical circuit
and the system function (ABS self-diagnosis), and goes off when the vehicle is operated (the func-
tion check is properly completed at a speed of about 6 to 10 km/h [3.8 to 6.3 mi/h]).
TIP
• The ABS warning light may go off later than usual when the vehicle is operated while the brakes
are applied (the brake switch turned to "ON").
• The ABS warning light goes off when walking or operating the vehicle at a speed of faster than 7
km/h (4.4 mi/h) after correcting malfunctions that have occurred in the past with all the necessary
checks and services completed.
The ABS warning light comes on to check the electrical circuit while the start switch is being
pushed.
ECA59C2101
If the rear wheel is raced with the vehicle on a centerstand, the system may determine that a
malfunction has been detected, and the ABS warning light may flash or come on. If this
occurs, set the main switch to "OFF", then back to "ON". The system is normal if the ABS
warning light goes off after starting off. If the fault codes have not been deleted, the fault
codes remain in the memory and the ABS warning light goes off when the vehicle is oper-
ated at a speed of about 30 km/h (18.8 mi/h).

Hydraulic unit assembly

The hydraulic unit assembly "1" is composed of hydraulic control valves (each with a outlet solenoid
valve and inlet solenoid valve), buffer chambers, hydraulic pumps, an ABS motor, and ABS ECU.
The hydraulic unit adjusts the front and rear wheel brake fluid pressure to control the wheel speed
according to signals transmitted from the ABS ECU.
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