Yamaha YZF-R1 Series Service Manual page 230

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 Yamaha diag-
nostic tool. For more information, refer to the
operation manual of the Yamaha diagnostic
tool.
• 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. 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 ABS reaction-
force confirmation.
ABS (Anti-lock Brake System)
5. Removing the protective cap, and then con-
nect the Yamaha diagnostic tool to the
Yamaha diagnostic tool coupler (6P).
Yamaha diagnostic tool USB (US)
90890-03269
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 9-2.
6. Start the Yamaha diagnostic tool and display
the diagnosis of function screen.
7. Select code No. 1, "ABS reaction-force con-
firmation".
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. A reaction-force pulsating action is generated
in the brake lever "1" and continues for a few
seconds.
TIP
• The reaction-force pulsating action consists of
quick pulses.
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2