Yamaha R15 2022, Service Manual

Page: 440 / 497

8-107
ABS (ANTI-LOCK BRAKE SYSTEM)
– + ELEC
EAS30530
BASIC PROCESS FOR TROUBLESHOOTING
[A] Turn the main switch to “ON”,
and check the ABS warning
light.
[A-3] The ABS warning light
comes on.
Connect the YDT, and then
execute functional diagnosis.
Can the tool communicate
with the ABS ECU?
[B-1] Check for ABS fault codes
in the screen for the YDT.
Execute fault diagnosis.
Are fault codes displayed on
the screen?
[C-1] Perform the final checks.
Were all of the final checks
completed normally?
Finished.
[A-1] Does only the ABS
warning light fail to
come on?
[A-2] Do all indicator lights
fail to come on?
[A-4] Only the ABS ECU
fails to
communicate.
[A-5] ABS ECU and FI ECU
fail to communicate.
[B-2] Diagnose by the
fault code.
The reaction force generated
during brake line routing
confirmation is incorrect.
• The brake hoses and brake
pipes are not connected
correctly.
The ABS warning light does
not go off when the light is
checked.
• The malfunction is not
corrected.
• There is a break in the wire
harness between the ABS
ECU and the meter
assembly.
• The meter assembly circuit is
defective.
• The ABS warning light circuit
in the hydraulic unit
assembly is defective.
• The ABS warning light (LED) is
defective.
• The wire harness is grounded
between the ABS ECU and the
meter assembly.
• The meter assembly circuit is
defective.
• The hydraulic unit assembly is
defective.
• The main switch is defective.
• The battery voltage is low.
• The main fuse is blown.
• The meter assembly circuit is
defective.
• The ABS control unit fuse is
blown.
• The ABS ECU coupler is
disconnected.
• The wire harness is defective.
• The hydraulic unit assembly is
defective.
• The connection with the YDT is
defective.
• The wire harness is defective.
[B-3] Delete the fault codes.
Return to [A].
Return to [A].
Return to [A].
Return to [A].
Return to [A].
Return to [A].
Yes
(Check that the ABS warning
light goes off during the ABS
warning light check.)
No
No
Yes
Can communicate
Comes on
Cannot
communicate
Fails to
come on
No
Yes
Yes
Yes
Yes
BCWF8197E0.book Page 107 Thursday, November 18, 2021 9:18 AM