Yamaha 5DF-AE2, Дополнительное руководство по обслуживанию

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ANTI-LOCK BRAKE SYSTEM (ABS)
CHAS
Soft wear operation flow
Turn the main switch on
Initialize
Self diagnosis
(at static)
Self diagnosis
(at riding)
Receive the signals
Control operation
Judge of decompressing /
pressurizing
8 / 1000
seconds
NOTE:
The operation result is confirmed by the monitor
circuit. Based on the result, the control signals of
hydraulic unit (HU) and fail-safe relay will be is-
sued.
ABS control operation
The ABS control operation performed in ECU is di-
vided into 2 parts as follows.
1 Hydraulic control
2 Self diagnosis
These operations will be performed repeating one
time in every 8/1000 seconds. In the case of fail-
ure occurrence, it is stored in the malfunction code
memory allowing easy find and check of failures.
Depending on the type of failure, it will not be re-
corded in the memory. (e.g. battery voltage drop)
Hydraulic unit (HU)
This hydraulic unit (HU) 1 is the component to
control the hydraulic pressure of brake system un-
der the signal of ECU, and located beside the bat-
tery box at the center of scooter central part.