Hydraulic Unit Operation Tests - Yamaha Tracer MT09TRAH 2017 Service Manual

6. Bleed:
• Brake system
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM (ABS)" on page 3-15.
7. Check the operation of the hydraulic unit ac-
cording to the brake lever and the brake ped-
al response. (Refer to "HYDRAULIC UNIT
OPERATION TESTS" on page 4-65.)
ECA14770
NOTICE
Always check the operation of the hydraulic
unit according to the brake lever and the
brake pedal response.
8. Delete the fault codes. (Refer to "[B-3] DE-
LETING THE FAULT CODES" on page
8-147.)
9. Perform a trial run. (Refer to "CHECKING
THE ABS WARNING LIGHT" on page 4-68.)
EAS30930

HYDRAULIC UNIT OPERATION TESTS

The reaction-force pulsating action generated in
the brake lever and brake pedal when the ABS
is activated can be tested when the vehicle is
stopped.
The hydraulic unit operation can be tested using
the following two methods.
• Brake line routing confirmation: this test
checks the function of the ABS after the sys-
tem was disassembled, adjusted, or serviced.
• ABS reaction-force confirmation: this test gen-
erates the same reaction-force pulsating action
that is generated in the brake lever and brake
pedal when the ABS is activated.
Brake line routing confirmation
EWA13120
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
TIP
• For the brake line routing confirmation, use the
diagnosis of function of the Yamaha diagnostic
tool.
• Before performing the brake line routing confir-
mation, make sure that no malfunctions have
been detected in the ABS ECU and that the
wheels are not rotating.
1. Place the vehicle on the centerstand.
2. Turn the main switch to "OFF".
3. Remove:
• Passenger seat/Rider seat
Refer to "GENERAL CHASSIS (1)" on page
4-1.
ABS (ANTI-LOCK BRAKE SYSTEM)
4. Check:
• Battery voltage
Lower than 12.8 V  Charge or replace the
battery.
Battery voltage
Higher than 12.8 V
TIP
If the battery voltage is lower than 12.8 V, charge
the battery, and then perform brake line routing
confirmation.
5. Removing the protective cap "1", and then
connect the Yamaha diagnostic tool to the
Yamaha diagnostic tool coupler (4P).
Yamaha diagnostic tool USB
90890-03250
Yamaha diagnostic tool (A/I)
90890-03252
6. Start the Yamaha diagnostic tool and display
the diagnosis of function screen.
7. Select code No. 2, "Brake line routing confir-
mation".
8. Click "Actuator Check" "1", and then operate
the brake lever "2" and brake pedal "3" simul-
taneously.
TIP
• The hydraulic unit operates 1 second after the
brake lever and brake pedal are operated si-
multaneously and continues for approximately
5 seconds.
4-65
1