Hydraulic Unit Operation Tests - Yamaha XSR 900 2022 Service Manual

a
7. Fill:
• Brake fluid reservoir
(with the specified amount of the specified
brake fluid)
Specified brake fluid
DOT 4
EWA17280
WARNING
• Use only the designated brake fluid. Other
brake fluids may cause the rubber seals to
deteriorate, causing leakage and poor
brake performance.
• Refill with the same type of brake fluid that
is already in the system. Mixing brake fluids
may result in a harmful chemical reaction,
leading to poor brake performance.
• When refilling, be careful that water does
not enter the brake master cylinder reser-
voir or brake fluid reservoir. Water will sig-
nificantly lower the boiling point of the
brake fluid and could cause vapor lock.
ECA13540
NOTICE
Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean up
any spilt brake fluid immediately.
8. Bleed:
• Brake system
Refer to "BLEEDING THE HYDRAULIC
BRAKE SYSTEM (ABS)" on page 3-15.
9. 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 4-56.)
ECA14770
NOTICE
Always check the operation of the hydraulic
unit according to the brake lever and the
brake pedal response.
ABS (ANTI-LOCK BRAKE SYSTEM)
10.Delete the DTC. (Refer to "SELF-DIAGNOS-
TIC FUNCTION AND DIAGNOSTIC CODE
1
TABLE" on page 9-43.)
11.Perform a trial run. (Refer to "CHECKING
THE ABS WARNING LIGHT" on page 4-59.)
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 YDT.
• 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 a maintenance stand.
2. Turn the main switch to "OFF".
3. Remove:
• Rider seat
• Bracket
Refer to "GENERAL CHASSIS (1)" on
page 4-1.
4. Check:
• Battery voltage
Lower than 12.8 V → Charge or replace the
battery.
4-56
Battery voltage
Higher than 12.8 V