id
DRIVE-CONTROL
COMPONENTS
-
ABS <FWD>
3-35
FUNCTION OF INDIVIDUAL CIRCUITS
(1) The wheel speed sensor interface circuit converts the AC
voltage signal into DC pulse signal.
(2)
The power monitor circuit, sensor interface circuit and motor
drive monitor interface circuit are electrical converters for
inputting the stop light switch and other vehicle condition
signals.
(3) The CPU I and II are microcomputers which perform wheel
speed, wheel deceleration and other calculations required
for anti-lock control on the basis of the wheel speed signals
input from the wheel speed sensors, and provides anti-lock
controls according to the calculated data. The two micro-
computers, CPU I and II, monitor each other to detect
a failure in the system.
They also have diagnostic test mode and failure detection
fail-safe functions.
(4) The solenoid drive circuit, motor relay drive circuit, valve
relay drive circuit and ABS warning light drive circuit are
electrical converters for ON/OFF control of the HU solenoid
valves to control the brake fluid pressure, and for ON/OFF
control of the motor for producing a high fluid pressure
in the HU, and also for lighting the warning light to alert
the driver to a system error.
(5) The failure code memory stores the codes of failures that
occurred in the system and does not clear the data even
if the battery power supply is disconnected.
To Next Page
Loading...
Need help?
General
