Abs Control Operation - Yamaha FZ8NA Service Manual

ABS control operation

The ABS control operation performed in the ABS ECU is divided into the following two parts.
• Hydraulic control
• Self-diagnosis
When a malfunction is detected in the ABS, a fault code is stored in the memory of the ABS ECU for
easy problem identification and troubleshooting.
TIP
• Some types of malfunctions are not recorded in the memory of the ABS ECU (e.g., a blown ABS
ECU fuse).
• The ABS performs a self-diagnosis test for a few seconds each time the vehicle first starts off after
the main switch was turned on. During this test, a "clicking" noise can be heard from under the
seat and if the front brake lever or rear brake pedal are even slightly applied, a vibration can be felt
at the lever or pedal, but these do not indicate a malfunction.
1. Software operation flow
2. Main switch "ON"
3. Initialize
4. Self-diagnosis (when static)
5. Self-diagnosis (when riding)
6. Receive signals
7. Control operation
8. Depressurize/pressurize
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