Standard Cruise Control

57x d 05.07.000

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 will 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 D12 automated transmission, setting the cruise control with the engine brake on will activate cruise descent control mode. Moving the transmission shift lever to the top position will resume the set cruise speed. Moving the lever down to engage the engine brake after the cruise control has been set will activate deceleration mode. See ‘Cruise Descent Control and deceleration modes, Detroit™ Automated Transmissions’ 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. See Fig..

  1. Cruise Accelerate/Resume

  2. Quick Access System Settings

  3. Cruise Decelerate/Set

  4. Phone Hang-Up/Reject

  5. Marker Interrupt**

  6. Phone Pick-Up

  7. Headlamp Interrupt**

  8. Cancel Cruise Control

  9. **Not available in all markets

Fig. 1, Steering-Wheel-Mounted Right-Hand Switch Pod - ICUC

  • 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. See Fig.. The speed memory will be retained until the ignition is turned off.

  1. Gear Indicator

  2. Gear mode

  3. Clock

  4. Soft Telltales

  5. Adaptive Cruise Control and Tracked Vehicle Distance

  6. Cruise Control Symbol (adaptive cruise control shown)

  7. Cruise Control Set Speed

  8. Cruise Control Overspeed

  9. Cruise Control Underspeed

Fig. 2, Static Menu - ICUC

  • 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.

  • 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.

    Note: Cruise control is cancelled if the brake or clutch pedal is depressed, or vehicle speed drops below the minimum cruise control speed.

  1. To cruise at a particular speed:
    1. Depress the accelerator pedal until the speedometer reaches the desired speed.
    2. Press the cruise decelerate/SET button to set the desired speed.

    2. Note: The speed memory is lost whenever the ignition switch is turned to OFF.

  2. To disengage the cruise control, do one of the following:

    • In the ICUC system, 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. Press and hold to clear the set speed (Detroit Diesel engines only).

    • Depress the brake pedal.

    • Depress the clutch pedal (on a manual transmission only).

  3. To resume a preselected cruise speed, press the cruise accelerate/RES button. Cruise will return to the last set speed.

    4. Note: If vehicle speed drops below the minimum cruise control speed, cruise control will disengage. To resume to the preselected cruise speed, increase vehicle speed to above minimum cruise control speed and press the cruise accelerate/RES button.

  4. To increase cruise speed, press the cruise accelerate/RES button until the desired set speed is displayed.
  5. 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.
    On vehicles with adaptive cruise control, the leading vehicle following distance can be set in the Quick Access menus.
Note:
Parent topic: Standard Cruise Control
Document Number: 0000109073
Manual Publication Date: 2024-05-09
Topic Publication Date: 2025-04-05