ICU4

Functions

The mode/reset button, located on the right side of the lightbar, controls the driver message center. Press the mode/reset button to advance one screen; hold the button down to select a menu choice or reset the display. When the display is reset, an audible chirp sounds.

Direct Access Screens

When the parking brake is not set, pressing the mode/reset button will scroll through the direct access screens.

• Trip distance

• Trip hours

• Outside temperature

• Back to odometer

Stationary Access Screens

When the parking brake is set, pressing the mode/reset button will scroll through the stationary access screens. See Fig..

• Odometer

• Trip distance

• Trip hours

• Outside temperature

Fig. 1, ICU4 Stationary Access Screens

• Select screen

• Temperature alert screen

• Diagnostic screen

• Clear screen (with less than 254 miles)

• Engine miles

• Engine hours

• Setup screen

Trip Information

Trip information allows you to view trip mileage and time.

When the odometer reading is displayed, press the mode/reset button once for trip distance. Press the mode/reset button a second time for trip hours (engine hours).

Press and hold the mode/reset button to reset trip miles or hours to zero.

Ambient Air Temperature

When the ambient air temperature drops below 35°F (1.7°C), the ICU displays a caution text at 1-second intervals for five seconds and a chime sounds if the ambient temperature alarm is enabled. The driver can acknowledge the message by pressing the mode/reset button. The chime will not sound again unless the temperature cycles above 37°F (4°C) and back below 35°F (1.7°C).

When the parking brake is set, the ambient air temperature display can be changed from °F to °C by changing the MI or KM selection in the SETUP menus. The warning message can be disabled or enabled in the SETUP menus.

Diagnostic Screens

The diagnostic screens are used by trained technicians to retrieve fault codes and other diagnostic information pertaining to the vehicle. Active faults are current problems that require attention. If active fault codes display during start-up or at any other time, make a note of the fault code and text message, then call an authorized Freightliner service facility for assistance.

During vehicle start-up, with the parking brake set, the ICU4 will display any active fault codes for three seconds each until the parking brake is released. If service cycle screens are enabled and service distance or time has been exceeded, the text SERVICE HOUR/MI (KM) will be displayed to inform the driver that the service interval has been exceeded and vehicle service is required. See Fig. for a the diagnostic and engine display screens.

Fig. 2,  ICU4 Diagnostic and Engine Display Screens

To access the diagnostic screens, press and hold the mode/reset button when the DIAG screen is displayed.

If the word SERVICE appears on the diagnostic message display screen, service cycle screens are enabled. Either service miles or hours can be enabled, but not both. Hold the mode/reset button to display miles or hours remaining until the next scheduled service. If MI (KM) appears on the DIAG screen, service miles are enabled; if HOURS appears on the screen, service hours are enabled. If service miles or hours have been exceeded, the number flashes to indicate service is overdue.

Engine Screens

The engine screen displays total engine miles or hours. Press and hold the mode/reset button to display total engine miles. Press and hold it a second time to display total engine hours.

To access the engine screens, press and hold the mode/reset button when the engine miles/hours screen is displayed.

Setup Screens

The setup screens are used to manage ICU4 parameters. See Fig..

Fig. 3,  ICU4 Setup Screens

To access the setup screens, press and hold the mode/reset button when the SETUP screen is displayed.

For each parameter, press and hold the mode/reset button to navigate to the parameter change screen. In each change screen, use the mode/reset button to toggle between options.

The last screen in the setup menu, RESET EE , is for resetting certain parameters to the original settings. Hold the mode/reset button to reset the antilock braking system (ABS), SAMS roll call, automated transmission display, transmission heartbeat, sensor fault codes, and engine oil level screens. Press the mode/reset button to sequence back to the odometer.