Cruise Control System System Description

Low speed limit
The lowest possible limit of the speed setting range is set at approximately 40 km/h (25 mph). The cruise control system cannot be set when the driving vehicle speed is below the low speed limit. Cruise control operation will be automatically canceled but the stored vehicle speed will be retained when the vehicle speed drops below the low speed limit of approximately 40 km/h (25 mph) while the cruise control is in operation.

High speed limit
The highest possible limit of the speed setting range is set at approximately 200 km/h (125 mph). The cruise control system cannot be set when the driving vehicle speed is over the high speed limit. Also, + (ACCEL)/RES (RESUME) cannot be used to increase speed beyond the high speed limit.

SET CONTROL
The vehicle speed is stored and constant speed control is maintained when pushing the cruise control main switch to - (COAST)/SET while driving with the main switch on (the cruise main indicator light is on), and the vehicle speed is within the set speed range between the low and high speed limits.

- (COAST) CONTROL
When the cruise control main switch is set to - (COAST)/SET and held in that position while the cruise control system is operating, the ECM sends a "throttle valve opening angle 0°" demand signal to the cruise control system. Then the vehicle speed, when the cruise control main switch is released, is stored and maintained.

HINT:

An actual throttle valve opening angle of 0° is not possible due to the idle speed control, etc.

TAP-DOWN CONTROL
When tapping down the cruise control main switch to - (COAST)/SET (for approximately 0.6 seconds) while the cruise control system is in operation, the stored vehicle speed decreases each time by approximately 1.6 km/h (1.0 mph). When the cruise control main switch is released from - (COAST)/SET and the difference between the driving and stored vehicle speed is more than approximately 5 km/h (3.1 mph), the driving vehicle speed is stored and constant speed control is maintained.

ACCELERATION CONTROL
The throttle valve motor of the throttle body assembly is instructed by the ECM to open the throttle valve when + (ACCEL)/RES (RESUME) on the cruise control main switch is pressed and held while the cruise control system is in operation. When the cruise control main switch is released from + (ACCEL)/RES (RESUME), the vehicle speed is stored and the vehicle is controlled at a constant speed.

TAP-UP CONTROL
When tapping up the cruise control main switch to + (ACCEL)/RES (RESUME) (for approximately 0.6 seconds) while the cruise control system is in operation, the stored vehicle speed increases each time by approximately 1.6 km/h (1.0 mph). However, when the difference between the driving speed and the stored vehicle speed is more than approximately 5 km/h (3.1 mph), the stored vehicle speed will not be changed.

RESUME CONTROL
If cruise control operation was canceled with the stop light switch assembly, the CANCEL switch or the low speed limit control, and if driving speed is within the limit range, pushing the cruise control main switch to + (ACCEL)/RES (RESUME) restores vehicle speed memorized at the time of cancellation, and maintains constant speed control.

MANUAL CANCEL CONTROL
Performing any of the following cancels the cruise control system while in operation (the stored vehicle speed in the ECM is maintained).

1. Depressing the brake pedal
   
2. Depressing the clutch pedal (for M/T)
   
3. The shift lever is moved to except D or S (S5 and S4 range) (for U250E).
   
4. The shift lever is moved to except D or 3 (for U341E).
   
5. Pulling the cruise control main switch to CANCEL
   
6. Turning the cruise control main switch off (the vehicle speed stored in the ECM is not maintained)