Standard Cruise Control
Warning: Do not use the cruise control system when driving conditions do not permit maintaining a constant speed, such as in heavy traffic or on roads that are winding, icy, snow-covered, slippery, or roads with a loose driving surface. Failure to follow this precaution could cause a collision or loss of vehicle control, possibly resulting in personal injury or property damage.
Notice: When the cruise control is engaged, do not attempt to shift gears without using the clutch pedal. Failure to follow this precaution may result in a temporarily uncontrolled increase in engine speed. Transmission damage and gear stripping could result.
Note: If the vehicle is equipped with a Detroit DT12 automated transmission, setting the cruise control with the engine brake on activates cruise descent control mode. Moving the transmission shift lever to the top position resumes the set cruise speed. Moving the lever down to engage the engine brake after the cruise control has been set activates deceleration mode. See ‘Cruise Descent Control and Deceleration Modes’ in this chapter.
In the ICUC, standard cruise control is operated by three switches mounted in the right-hand switch pod of the steering wheel.
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Cruise Decelerate/SET Button—Press to set the cruise speed while the vehicle is traveling at the desired speed. Press and hold to decrease the set cruise speed by 5 mph increments (Detroit Diesel engines only). Single press decreases cruise speed by 1 mph. When cruise control has been set, the driver display static menu in the ICUC shows relevant cruise control icons and the set speed. The speed memory is retained until the ignition is turned off.
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CNCL Button—Press to pause the cruise control, while retaining the speed setting in memory. The cruise control can also be disengaged, while retaining the speed memory, by depressing the brake or clutch pedals.
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Cruise Accelerate/RES Button—Press to resume the set speed. Press and hold to increase the set cruise speed by 5 mph increments (Detroit Diesel engines only). Single press increases cruise speed by 1 mph. If no previous set speed is stored, pressing the button sets the cruise speed.
- To cruise at a particular speed:
- Depress the accelerator pedal until the speedometer reaches the desired speed.
- Press the cruise decelerate/SET button to set the desired speed.
- To disengage the cruise control, do one of the following:
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Press the CNCL button in the center of the right-hand steering-wheel-mounted switch pod. A single press disengages the cruise control, but retains the set speed.
On vehicle's equipped with a Detroit Diesel engine, press and hold the CNCL button to clear the set speed.
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Depress the brake pedal.
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If equipped with a manual transmission, press the clutch pedal.
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- To resume a preselected cruise speed, press the cruise accelerate/RES button. Cruise control returns to the last set speed.
- To increase cruise speed, press the cruise accelerate/RES button until the desired set speed is displayed.
- To decrease cruise speed, press the cruise decelerate/SET
button until the desired set speed is displayed.
The cruise speed hysteresis (maximum speed above and below the set speed) can be set in the ICU settings menu. The leading vehicle following distance can be set using the quick access button.
Note: The set speed memory is lost whenever the ignition is turned off.
Note: If vehicle speed drops below the minimum cruise control speed, cruise control disengages. To resume to the preselected cruise speed, increase the vehicle speed to above the minimum cruise control speed and press the cruise accelerate/RES button.