### System Outline

It is a drive control system at constant speed by controlling fuel injection volume by operating switches at hand instead of accelerator pedal when a driver wants to drive at constant speed on a highway.

1.Set Control

When the SET switch is turned from ON to OFF during driving with the main switch ON, the vehicle speed at that time is registered and the vehicle is controlled at that constant speed.

2.Coast Control

When the SET switch is kept ON during driving with the cruise control, the cruise control required opening gets zero to reduce the vehicle speed. If the SET/COAST switch is turned OFF, the vehicle speed at that time is registered and the vehicle is controlled at the constant speed.

3.Tap Up Control

Whenever +RES switch is tapped ON instantaneously (For approximately 0.5 sec.), the registered vehicle speed increases by about 1.6 km/h.

4.Tap Down Control

Whenever the SET switch is tapped ON instantaneously (For approximately 0.5 sec.), the registered vehicle speed decreased by about 1.6 km/h.

5.Accel Control

When +RES switch kept ON during driving with the cruise control, the engine control module controls the throttle valve to accelerate the vehicle.
It also registers the vehicle speed when +RES switch is turned OFF and controls the vehicle at the constant speed.

6.Manual Cancel Mechanism

If any of the following signals is input during cruise control travelling, the cruise control is cancelled.

*The stop lamp SW is turned on.

*The CANCEL SW is turned on.

*The ONOFF SW is turned off.

*The clutch pedal is depressed.

7.Auto Cancel Function

If any of the following conditions is encountered, the cruise control is automatically cancelled.

*The stop light SW wiring is faulty or shortcircuited.

*The vehicle speed signal is faulty.

*The electronically controlled throttle malfunctions.

8.Other Cancel Function

If any operate VSC system the cruise control is cancelled.

9.Overdrive Control Function

The overdrive control may be cancelled if the vehicle travels on the slope during cruise control travelling. After the overdrive control has been cancelled, when climbing hill is judged to finish from throttle opening information, the vehicle returns to the overdrive control mode again after the overdrive return timer is completed.