DRIVE-CONTROL COMPONENTS - Anti-lock Braking System (ABS) 3-39
ELECTRONIC CONTROL UNIT (ECU)
The ECU is mounted on the quarter inner lower panel
(RH). The ECU is made up of 2 microprocessors, in-
put/output interface, etc. Since there are two central
processing units (CPU), there is a double check; the
wheel speed sensor signal and valve control signal are
compared by both CPUs and, if the data do not match,
ABS control is stopped. Furthermore, there is a
diagnostic function for easy diagnosis of breakdowns.
WARNING LAMP CONTROL
The lamp illuminates when an abnormality is detected in
the system. Also, the lamp will illuminate as shown in
the illustration at left in conjunction with operation of the
ignition switch when checking a lamp blowout.
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