Chrysler Conquest 1988 Service Manual page 615

AUTOMATIC SPEED CONTROL IASC) SYSTEM
- Outline
14-87
ELECTRONIC CONTROL UNIT (ECU) BLOCK DIAGRAM
r
I
16Y2916
The ECU with a built-in microcomputer has the current vehicle
speed set, deceleration set, acceleration set, resume, cancel,
low speed limit and high speed limit functions and the fail-safe
function.
The microcomputer outputs the control signals to the two
solenoid valves (release and control) of the actuator according
to the signals from the vehicle speed sensor and the switches.
The ASC operates only when the MAIN switch is on.
(1) Current vehicle speed set function
When the SET switch is pressed while driving within the
vehicle speed setting range of 40 21 3 to 200 + 5 km/h (25
t 2 to 124 -f- 3 mph), the vehicle speed when the switch is
turned from on to off is stored as the set vehicle speed and
thereafter the actuator is so controlled as to
keep that
speed. The timing chart is shown below.