Yamaha tmax XP500A, Service Manual

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GEN
INFO
FEATURES
• Electronic control unit (ECU)
The ECU (ABS)
1
controls the ABS and is
located on the right side of the vehicle near the
top of the front fork. To protect the ECU (ABS)
from water damage, it is protected by a cover.
1
• 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
• Fail-safe relay
The fail-safe relay controls the power supply of
the hydraulic unit and is located upper the
ECU (ABS).
1
Fail-safe relay
1