Yamaha 2003 FJR1300, Service Manual

Page: 77 / 162

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CHAS
• ABS control operation
The ABS control operation performed in the
ECU (ABS) is divided into the following two
parts.
• Hydraulic control
• Self-diagnosis
These operations are performed once every
8/1,000 of a second. When a failure is
detected in the ABS, a malfunction code is
stored in the memory of the ECU (ABS) for
easy problem identification and troubleshoot-
ing.
NOTE:
_
Some types of failures are not recorded in the
memory of the ECU (ABS) (e.g., a drop in bat-
tery voltage).
1
Software operation flow
2
Set the main switch to “ON”.
3
Initialize
4
Self-diagnosis (when static)
5
Self-diagnosis (when riding)
6
Receive signals
7
Control operation
8
Depressurize/pressurize
È
8/1,000 of a second
2
3
4
5
6
7
8
1
È
ANTI-LOCK BRAKE SYSTEM (FJR1300A)