Maintenance Of The Abs Ecu; Abs Troubleshooting; Abs Operation When The Abs Warning Light Comes On; Abs Ecu Self-Diagnosis And Servicing - Yamaha R1 Series 2015 Service Manual

EAS30845

MAINTENANCE OF THE ABS ECU

Checking the ABS ECU
1. Check:
• Terminals "1" of the ABS ECU
Cracks/damages
connected to the assembly as a set.
• Terminals "2" of the ABS ECU coupler
Connection defective, contaminated, come-off
TIP
If the ABS ECU coupler is clogged with mud or dirt, clean with compressed air.
EAS30528
ABS TROUBLESHOOTING OUTLINE
This section describes the troubleshooting for the ABS in detail. Read this service manual carefully and
make sure you fully understand the information provided before repairing any malfunctions or perform-
ing service.
The ABS ECU (Electronic Control Unit) has a self-diagnosis function. When failures occur in the sys-
tem, the ABS warning light on the meter assembly indicates a malfunction.
The following troubleshooting describes the problem identification and service method using the
Yamaha diagnostic tool. For information about using the Yamaha diagnostic tool, refer to "[B-2] DIAG-
NOSIS USING THE FAULT CODES" on page 8-131. For troubleshooting items other than the following
items, follow the normal service method.
EWA16710
WARNING
When maintenance or checks have been performed on components related to the ABS, be sure
to perform a final check before delivering the vehicle to the customer.

ABS operation when the ABS warning light comes on

1. The ABS warning light remains on
• A malfunction was detected using the ABS self-diagnosis function.
• The ABS self-diagnosis has not been completed.
The ABS self-diagnosis starts when the main switch is turned to "ON" and finishes when the vehicle
has traveled at a speed of approximately 5 km/h (3 mi/h).
2. The ABS warning light comes on after the engine starts, and then goes off when the vehicle starts
moving (traveling at a speed of approximately 5 km/h (3 mi/h)).
3. The ABS warning light flashes
• Refer to "BASIC INSTRUCTIONS FOR TROUBLESHOOTING" on page 8-128.
Self-diagnosis and servicing
The ABS ECU has a self-diagnosis function. By utilizing this function, quick problem identification and
service are possible. Previous malfunctions can be checked since the ABS ECU also stores the mal-
function history.
The fault codes recorded in the ABS ECU can be checked using the Yamaha diagnostic tool. When the
service is finished, check the normal operation of the vehicle, and then delete the fault code(s). For in-
Replace the hydraulic unit assembly, brake hoses, and brake pipes that are
1
ABS operates as a normal brake system.
ABS operation is normal.
ABS (Anti-lock Brake System)
Correct or clean.
8-127
2
ABS operation is normal.