CONSTRUCTION AND OPERATION



The cruise control section in engine-ECU calculates the cruise control system operation condition based on the signals sent from switches and sensors. Based on the calculation, the cruise control section outputs the target accelerator pedal opening angle signal to the engine control section, and CVT control signal to CVT-ECU <Petrol engine>, shift control signal to A/T-ECU <Diesel engine> or clutch switch <M/T> and cruise control status (ON/OFF, etc.) to the combination meter, respectively.

The combination meter will turn on the cruise control indicator lamp <Standard meter>, the cruise control display screen <High contrast meter> or the speed limiter display screen when the cruise control system is active. On the high contrast meter, "SET" symbol will also appear in the screen during constant speed driving.
BLOCK DIAGRAM


SYSTEM FUNCTIONS



SET FUNCTION


1.While driving in the vehicle speed range of approximately 40 to 200 km/h, press the SET - switch.
2.The cruise control system stores the vehicle speed when the SET - switch is released, and then performs a constant speed driving at the stored vehicle speed. The speed limiter will store a set vehicle speed, and then regulate the vehicle speed within that stored speed.
3.When the SET - switch is operated while driving at the vehicle speed of high speed limit (approximately 200 km/h) or faster, the constant speed driving is not performed.
4.When the SET - switch is operated while driving at the vehicle speed of low speed limit (approximately 40 km/h) or slower, the constant speed driving is not performed.

DECELERATION FUNCTION


1.When the SET - switch is pressed and held for approximately 0.5 second or longer during the constant speed driving, the vehicle is decelerated by using engine braking while the switch is pressed.
2.After that the SET - switch is released, the vehicle speed of that time is newly stored, and then the constant speed driving is performed at that speed. The speed limiter will store a set vehicle speed, and then regulate the vehicle speed within that stored speed.
3.In addition, when the SET - switch is pressed for less than approximately 0.5 second, the vehicle speed is decreased by approximately 1.6 km/h from the constant speed driving speed. The decelerated speed is newly stored, and then the constant speed driving is performed at that speed. Every time the SET-switch is pressed briefly (within approx. 0.5 seconds), the speed limiter will store a lower vehicle speed by 1 km/h. The speed limiter will regulate the vehicle speed within that last stored speed.
4.When the SET - switch is pressed and held, and the vehicle speed is decelerated to low speed limit (approximately 40 km/h) , the low speed limit will be maintained.

RESUME FUNCTION


1.During the constant speed driving, press the CANCEL switch, or depress the brake pedal to cancel the constant speed driving. The speed limiter will be deactivated by pressing the CANCEL switch.
2.Afterward, when the RES + switch is pressed while driving at a vehicle speed of low speed limit (approximately 40 km/h) or more, a constant speed driving is performed at the vehicle speed stored when the constant speed driving was cancelled.

ACCELERATION FUNCTION


1.During the constant speed driving, when the RES + switch is pressed and held for approximately 0.5 seconds or longer, the vehicle is accelerated with the specified acceleration while the switch is pressed.
2.After that the RES + switch is released, the vehicle speed of that time is newly stored, and then the constant speed driving is performed at that speed. The speed limiter will store a set vehicle speed, and then regulate the vehicle speed within that stored speed.
3.In addition when the RES + switch is pressed for less than approximately 0.5 second, the vehicle speed is increased by approximately 1.6 km/h from the constant speed driving speed. The accelerated vehicle speed is newly stored, and then the constant speed driving is performed at that speed. Every time the RES + switch is pressed briefly (within approx. 0.5 seconds), the speed limiter will store a higher vehicle speed by 1 km/h. The speed limiter will regulate the vehicle speed within that last stored speed.

CANCEL FUNCTION


When any of the following conditions are satisfied, the constant speed driving will be cancelled. The speed limiter will be deactivated by pressing the CANCEL switch.


EMERGENCY CANCEL FUNCTION


When the accelerator pedal is depressed fully to drive at higher speed than the stored speed, the speed limiter will be deactivated temporarily

LAST STATUS MEMORY FUNCTION <RUSSIA>


The system stores ON/OFF status of the cruise control when the ignition switch is turned off. Then, when the ignition switch is turned on the next time, the system will resume the stored status.

FAIL-SAFE FUNCTION


When one of the following conditions is met, the cruise control system function will be suspended until the system returns to normal condition. Also, when one of the following conditions is met, a constant speed driving is cancelled immediately. The speed limiter will be also deactivated.

When one of the following conditions is met, unless the vehicle is stopped to turn the ignition switch to the "LOCK" (OFF) position, the cruise control system function will be suspended even if the system returns to the normal state. Also, one of the following conditions is met, a constant speed driving is cancelled immediately. The speed limiter will be also deactivated.


DIAGNOSIS FUNCTION


To ease the system inspection, the diagnosis code inspection, data list inspection is available by M.U.T.-III.
note For the diagnosis code items and input check code items, refer to the Workshop Manual.