Yamaha FJR13AG Service Manual page 677

EAS30537
[B-2] THE ABS WARNING LIGHT REMAINS ON
1. The battery voltage is low.
• Check the condition of the battery.
Refer to "CHECKING AND CHARGING THE BATTERY" on page 8-251.
• If the battery voltage is low, clean the battery terminals and recharge it, or replace the battery.
2. ABS ECU fuse
• Check the ABS ECU fuse for continuity.
Refer to "CHECKING THE FUSES" on page 8-250.
• If the ABS ECU fuse is blown, replace the fuse.
3. ABS ECU coupler
• Check that the ABS ECU coupler is connected properly.
• Connect the couplers properly if necessary.
4. There is a break in the wire harness between the main switch and the ABS ECU or between the ABS
ECU and the ground.
• Check for continuity between the brown/blue terminal of the main switch coupler and brown/blue
terminal of the ABS ECU fuse.
• Check for continuity between the brown/white terminal of the ABS ECU fuse and the brown/white
terminal of the ABS ECU coupler.
• If there is no continuity, the wire harness is defective. Replace the wire harness.
• Check for continuity between the black/white terminal of the ABS ECU coupler and the ground.
• If there is no continuity, the wire harness is defective. Replace the wire harness.
5. There is a break in the wire harness between the ABS ECU and the meter assembly (ABS warning
light).
• Check for continuity between the green/red terminal of the ABS ECU coupler and the green/red
terminal of the meter assembly coupler.
6. The meter assembly circuit is defective.
• Disconnect the ABS ECU coupler.
• The green/red terminal of the ABS ECU coupler is short-circuited to the ground.
• Turn the main switch to "ON", and then check the ABS warning light.
• If the ABS warning light is on, the internal circuit of the meter assembly is defective. Replace the
meter assembly.
• If the ABS warning light does not come on, the ABS ECU is defective. Replace the hydraulic unit
assembly.
7. The hydraulic unit assembly is defective.
EAS30538
[B-3] DIAGNOSIS USING THE FAULT CODES
Connect the test coupler adapter to the ABS test coupler, and then turn the main switch to "ON".
Information for the fault codes from the ABS ECU is contained in the following table. Refer to this table
for troubleshooting.
TIP
Record all of the fault codes displayed and inspect the check points.
Fault code table
TIP
Fault code numbers "ABS_15" (front wheel) and "ABS_16" (rear wheel) are indicated if a defective con-
nection is detected in the front or rear wheel sensor when the vehicle is not being ridden.
ABS (ANTI-LOCK BRAKE SYSTEM)
8-200