Yamaha R15 2022 Service Manual page 440

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