Acura RL (1996-2004 year). Manual - part 52
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34-5
Cruise Control
How the Circuit Works
The cruise control system uses mechanical and
electrical devices to maintain the car’s speed at a
setting selected by the driver.
System Description
The cruise control unit receives command signals
from the cruise control main switch and the cruise
control Set/Resume/Cancel switch. With the ignition
switch in ON (II) or START (III), voltage is provided
to the cruise control main switch through fuse 20.
When you push the switch to ON, power is provided
to the cruise control unit and the brake pedal
position switch.
The cruise control unit receives information about
operating conditions from the brake pedal position
switch, the vehicle speed sensor (VSS), and the A/T
gear position switch. The cruise control unit then
sends signals to the cruise control actuator which
regulates the throttle position to maintain the
selected speed. The control unit compares the
actual speed of the car to the selected speed, and
then opens or closes the throttle as necessary to
match the selected speed.
The brake pedal position switch releases the
system’s control of the throttle at the instant you
press on the brake pedal. The switch sends a signal
to the control unit by removing power from the
normally closed brake input (GRY wire), and
providing power at the normally open brake input
(GRN/WHT wire). The control unit responds by
allowing the throttle to close. The A/T gear position
switch sends a “disengage” signal to the control unit
that also allows the throttle to close if the shifter is
moved from the “D” position.
The cruise control system will set and automatically
maintain any speed above 25 mph (40 km/h). To set
it, make sure the main switch is on and the switch
indicator is on. Then, after reaching the desired
speed, press the SET switch. This sends a “set”
signal to the cruise control unit which, in turn,
controls the cruise control actuator to maintain the
set speed.
When you push the SET switch and the cruise
control system is on, the cruise control ON indicator
lights up.
You can cancel the cruise control system by pushing
the cancel switch or by turning the main switch off.
This removes power to the control unit and erases
the set speed from memory. If the system is
disengaged temporarily by the brake pedal position
switch, or A/T gear position switch, and the car’s
speed is still above 25 mph, press the RESUME
switch: the car will automatically return to the
previously set speed.
For gradual acceleration without pressing the
accelerator pedal, push the RESUME switch and
hold it there. This will send an “acceleration” signal
to the control unit. When you release the switch, the
system will be reprogrammed for the new speed. To
slow the car down, push the SET switch in and hold
it there. This sends a “deceleration” signal to the
control unit, causing the car to coast. When the
desired speed is reached, release the SET switch.
This reprograms the system for the new speed.
Refer to the Service Manual (Section 4, Engine
Electrical) for specific tests or troubleshooting
procedures.
2004 American Honda Motor Co., Inc.
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