Yamaha MT-09 2021 Service Manual page 187

5. Removing the protective cap, and then con-
nect the YDT to the YDT coupler (6P).
Yamaha diagnostic tool USB
90890-03267
Yamaha diagnostic tool (A/I)
90890-03264
TIP
• Yamaha diagnostic tool (A/I) (90890-03264) in-
cludes YDT sub harness (6P) (90890-03266).
• If you already have Yamaha diagnostic tool (A/
I) (90890-03262), YDT sub harness (6P)
(90890-03266) is separately required.
Refer to "YDT" on page 9-3.
6. Start the YDT and display the diagnosis of
function screen.
7. Select code No. 2, "Brake line routing confir-
mation".
8. Click "Actuator Check", and then operate the
brake lever "1" and brake pedal "2" simulta-
neously.
TIP
• The hydraulic unit operates 1 second after the
brake lever and brake pedal are operated si-
multaneously and continues for approximately
5 seconds.
• The operation of the hydraulic unit can be con-
firmed using the indicator.
On: The hydraulic unit is operating.
Flashing: The conditions for operating the hy-
draulic unit have not been met.
Off: The brake lever and brake pedal are not
being operated.
G088909
9. Check:
• Hydraulic unit operation
Click "Actuator Check", a single pulse will be
generated in the brake lever "1", brake pedal
"2", and again in the brake lever "1", in this or-
der.
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2
ABS (ANTI-LOCK BRAKE SYSTEM)
G088911
TIP
"ON" and "OFF" on the tool screen indicate
when the brakes are being applied and released
respectively.
ECA17371
NOTICE
• Check that the pulse is felt in the brake le-
ver, brake pedal, and again in the brake le-
ver, in this order.
• If the pulse is felt in the brake pedal before
it is felt in the brake lever, check that the
brake hoses and brake pipes are connected
correctly to the hydraulic unit assembly.
• If the pulse is hardly felt in either the brake
lever or brake pedal, check that the brake
hoses and brake pipes are connected cor-
rectly to the hydraulic unit assembly.
10.If the operation of the hydraulic unit is normal,
delete all of the DTC.
ABS reaction-force confirmation
EWA13120
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
TIP
• For the ABS reaction-force confirmation, use
the diagnosis of function of the YDT. For more
information, refer to the operation manual of
the YDT.
• Before performing the ABS reaction-force con-
firmation, make sure that no malfunctions have
been detected in the ABS ECU and that the
wheels are not rotating.
1. Place the vehicle on a maintenance stand.
2. Turn the main switch to "OFF".
3. Remove:
• Rider seat
Refer to "GENERAL CHASSIS (1)" on
page 4-1.
4-54
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2