Chrysler laser 1990 Technical Information Manual page 164

Start of deceleration
O N
position
2 to 6
Time sec.
0 (321
Temperature " C 1 ° F )
FUEL SYSTEM
CONTROL WHEN THE ENGINE SPEED IS UNUSUALLY LOW
The followi gcontrols are provided when the engine speec
falls below i5;D rpm after the engine has been fully warmed-up
[with engine coolant temperature more than 55°C (131"F)].
The idle speed control servo is activated immediately by a
particular number of angular steps which represent the
feedback correction.
(2) During servo position control
The idle speed control servo is activated to conform to a
position corresponding to an increased number of steps (46
steps).
DASH POT CONTROL
Control is provided to dampen the extending motion of the
deceleration shocks.
(1) Control while cruising
While cruising or racing, the idle speed control servo is
activated to further open the bypass air path corresponding
to the dash pot position which is more open than the idle
position.
The idle speed control servo is activated in this way when
the following conditions are met.
Engine speed 500 rpm or higher
l
Idle position switch in the OFF position
l
The dash pot position is dependent on the throttle valve
opening map value.
(2) Control during deceleration
When the vehicle is decelerated from a cruising or racing
speed, the idle speed control servo is activated to close the
bypass air path gradually from the dash pot position so that
the intake air volume is not abruptly reduced, thereby
dampening deceleration shocks.
The idle speed control servo is activated when either one of
the following conditions are met.
When the throttle position sensor output voltage drops
l
When the idle switch is turned on.
l
CONTROL WHEN STARTING
While the engine is being cranked, the idle speed control servo
is controlled to provide optimum bypass air volume for starting.
Immediately after the ignition switch is turned on, idle speed
servo position control is provided to achieve the optimum _
position.
80 (176)