Subaru XT 1988 Service Manual page 1261

BODY ELECTRICAL SYSTEM
6-2
Terminal
Color code Name
Description
No.
®
G
Vacuum valve
The signal for activating the vacuum valve is inputted to this
terminal.
*
The signals from terminals
®, ®
and
®
are not outputted unless the cruise control unit is connected to the harness and
actually operated.
(Adjust each terminal of the harness side connector of the cruise control unit according to the respective troubleshooting
procedure.
CONTROL AND OPERATION
Speed set range and
engagement operation
Resume/accelleration
operation
Coasting operation
Cancellation
If the set switch is turned ON when the car speed is in the range of
40~~
km/h to
250~g
km/h (25
~g
MPH to
155~g
MPH), the car speed is set, and automatically controlled.
When the set switch is kept in the ON position, the set car speed is updated every 0.4
second.
If the resume switch is set to ON within the set speed range, the car is accelerated up to the
memorized speed, and then automatically controlled at that speed.
If the resume switch is kept ON at a speed of over 40 km/h (25 MPH), acceleration is made
until the maximum engine output is reached.
If the resume switch is turned OFF after exceeding the set car speed, the car will continue at
the speed at the moment the switch was tu rned OF F.
If the resume switch is turned OFF without a set speed in memory, the entire system is
turned OFF.
Each time the set switch is pushed while the car is cruising, the set car speed is reduced by
approximately 1.6 km (1 MPH).
If the set switch is kept ON while the car is running at a constant speed, the car speed will
decrease as long as the switch is ON. If the set switch is turned OFF within the set speed
range, the car speed, at the time the switch is set to OF F, is memorized, and the car runs at
th is new set speed.
Each time the resume switch is pushed while the car is cruising, the car speed set in memory
increases by approximately 1.6 km (1 MPH).
The cruise control function is cancelled by the following operations, or during the following
conditions.
*
(a) When the main switch is set to OFF position.
* (b) When the ignition switch is set to ACC or OFF position.
(c) When either the brake switch, stop switch, clutch switch, or inhibitor switch is oper-
ated.
*
(d) When the engine speed exceeds 6,000
±
150 rpm.
(e) When the car speed is below 30 km/h (19 MPH).
*
(f) When the car speed input change per second is greater than ±25 km/h (±16 MPH).
* (g) When both the resume switch and set switch are depressed at the same time.
The operation indicated by the asterisk mark"
*"
causes the set speed to be erased.
Cruise control unit compares the actual car speed detected
by feedback signals from speed sensor incorporated in speed-
ometer with the speed set in the memory memorized when set
switch was turned on. A signal is then transmitted according
to the difference between the two speeds.
This signal is transmitted to solenoid valves of valve ASSY
located in engine compartment. The movement of actuator
operates throttle valve through accelerator pedal and cable,
thereby keeping the car speed constant.
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