Driver Message Center (2024)

ICU3/ICU4

The driver message center is controlled using the mode/reset switch, located on the right side of the ICU, and the + and – buttons mounted in the right-hand pod of the steering wheel ( Fig. 4.11 ). See Fig. 4.11 . Tap the mode/reset switch or the + switch to advance one screen; press and hold either switch to select a menu choice or reset the display. When the display resets, an audible chirp sounds.

NOTE: To reset values in the ICU4M and ICU4Me driver message centers, press and hold the + switch.

Fig. 4.11, Steering Wheel-Mounted Switches

Four driving screens are accessible when the parking brake is off. All screens and menus are accessible when the parking brake is on (parked screens).

Driving Screens

The following screens are available when the parking brake is off (when the vehicle is mobile) and no active fault codes are found. Use the + and – switches on the steering wheel, or the mode/reset switch, to scroll through the screens. To reset any values, press and hold the + switch or the mode/reset switch. The driving screens appear in the following order:

Odometer

Trip distance

Trip hours

Outside temperature

Parked Screens/Menus

The following screens and menus are available when the parking brake is on (when the vehicle is parked) and no active fault codes are found. Use the + and – switches on the steering wheel, or the mode/reset switch, to scroll through the driving screens. To reset any values, press and hold the + switch or the mode/reset switch. See Fig. 4.12 . The parked screens appear in the following order:

Odometer

Trip distance

Trip hours

Outside temperature

Temperature alert

Note: The engine oil level screen displays for Mercedes-Benz engines only (if equipped and enabled).

Fig. 4.12, ICU3 Parked Screens

Diagnostics

Clear screen (on vehicles with less than 255 miles on the odometer)

Engine miles/hours

Setup

Temperature Alert

When the outside temperature drops to 35°F (1.7°C) or less, the ICU displays a caution text at one-second intervals for five seconds, and an audible alert sounds. Tap the + or – switch on the steering wheel, or the mode/reset switch, to acknowledge the message. The audible alert will not sound again unless the temperature cycles above 37°F (4°C) and back to 35°F (1.7°C) or less. This warning only occurs while the ignition is on and the parking brake is released.

The temperature alert message allows the driver to enable or disable the ambient temperature warning.

Press and hold the mode/reset switch to toggle between on and off. Release the mode/reset switch, then tap it to select the displayed choice.

Diagnostics

When the DIAG screen is displayed, press and hold the mode/reset switch to access the various diagnostic screens. See Fig. 4.13 for a diagram of the diagnostic screens.

Fig. 4.13, ICU4 Diagnostic Screens

The diagnostic screens are used by trained technicians to retrieve fault codes and other diagnostic information pertaining to the vehicle. If active fault codes display during start-up or at any other time, make a note of the fault code and take the vehicle to an authorized Freightliner service facility

If fault codes are displayed, press and hold the mode/reset switch to view the next fault code until reaching the DIAG screen.

Engine Miles/Hours

When the engine miles/hours screen is displayed, press and hold the mode/reset switch to access the engines screen submenu. See Fig. 4.13 for a diagram of the engine screens.

Fig. 4.14, ICU4 Setup Screens

Setup

The setup menu allows the driver to manage ICU parameters. The setup screen submenu allows the driver to enable and change service intervals. See Fig. 4.14 .

If service intervals are enabled and service distance or time has been exceeded, the text SERVICE HOUR/MI (KM) will display at start-up to indicate vehicle service is required.

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

Use the last screen in the setup menu, RESET EE , to reset the parameters the ICU learns back to the default settings. Press and hold the mode/reset switch to reset the following learned parameters:

automated transmission display

seat belt switch learning

engine oil level

other electronic devices that have been removed from the vehicle (e.g. Qualcomm)

ICU4M

Functions

ICU4M settings and the driver message center are controlled with the + and – switches and the MY INFO switch, mounted on the dash. See Fig. 4.15 . Tap the MY INFO switch to drill down from each main screen to the submenus contained within it. Use the + and – switches to scroll through screens and select options. Tap the MY INFO switch again to exit each change screen.

Fig. 4.15, MY INFO Switch

With the parking brake off, only the odometer and alert messages can be displayed. Park the vehicle and set the parking brake to access the parked screens and menus.

Alert Messages

The driver message center displays alert messages when certain conditions occur. They are warnings, cautions, or other messages that require the driver's attention, but not all of them are critical to the operation of the vehicle.

NOTE: If there is more than one alert message to display, tap the + switch or the MY INFO switch to access the next message, and so on, until all messages have been viewed.

More important messages take priority over less important messages. The order of priority is:

parking brake set (with the vehicle moving)

parking brake off (with the door open)

low oil pressure or high coolant temperature

Incoming Message

On vehicles with a Qualcomm onboard communications system, a notification appears on the driver message center whenever a message is received.

NOTE: The incoming message screen also displays during the ignition sequence if a message is available.

This message displays for a preset time period, then returns after a preset interval until it is dismissed by the + and – switches or the MY INFO switch.

Parking Brake On

This warning message and an audible warning come on whenever the parking brake is applied and the vehicle is moving faster than 2 mph (3 km/h). See Fig. 4.16 . The screen and audible warning go away only when the parking brake is released, or speed is reduced below 2 mph.

Fig. 4.16, Parking Brake On Alert Message

Low Oil Pressure

This warning message and an audible warning come on whenever the oil pressure falls below the minimum oil pressure, whether the vehicle is idling or in motion. Tap the + and – switches or the MY INFO switch to dismiss the message.

If low oil pressure is detected during the ignition sequence, it displays as an active fault instead of an alert message. After 30 seconds, the message displays again.

High Coolant Temp

This message and an audible warning come on whenever the engine coolant temperature exceeds the maximum allowable temperature.

If high coolant temperature is detected during the ignition sequence, it displays as an active fault instead of an alert message. After 30 seconds, the message displays again.

Low Air Pressure

NOTE: On vehicles with ICU4Me, EPA 2016 or newer, the low air pressure warning telltale under the ICU4Me screen does not illuminate during the self-check or under low air conditions. This behavior is intended and complies with government regulations.

A pop-up message stating "Brake Air Supply Pressure Low" displays on the ICU4Me screen and an audible warning buzzer sounds when the air pressure in the primary or secondary reservoir has dropped below approximately 70 psi (483 kPa).

Low Voltage

On some vehicles, this optional message and an audible warning come on whenever a low voltage condition is detected.

Turn Signal On

This warning message and audible warning come on whenever the turn signal remains on for four minutes or five miles of travel. To dismiss this message, either turn off the turn signal or tap the + and – switches or the MY INFO switch.

Air Temperature

When the outside air temperature drops below 35°F (1.7°C), a warning text is displayed at one-second intervals for five seconds, and an audible warning will sound. Tap the + and – switches or the MY INFO switch to acknowledge the warning. The alert message will not occur again unless the temperature cycles above 37°F (4°C) and back below 35°F (1.7°C). This warning only occurs while the ignition is on and the parking brake is off.

Service Warnings

Service warning alerts display during the ignition sequence and indicate if a service interval has been reached or exceeded and maintenance is required. The messages may indicate the number of miles (km) or hours until the next required service or, once passed, the number of miles (km) or hours since maintenance should have been performed.

Automated Transmission Display

The ICU4M can display current gear information for vehicles with an automated transmission. The last three digits at the far right on the lower line of the driver message center are reserved for this information.

When a shift request is made by the driver, an up or down arrow is also displayed, depending on the shift direction.

For more information about specific models of automated transmissions, see Chapter 15 .

Driving Screens

The following screens are available when the parking brake is off (when the vehicle is mobile).

Fasten seat belt (rpm<100)

Fuel economy (rpm>100)

Fig. 4.17, ICU4M Driving Screens

Odometer

Trip distance/hours

Trip advisory

Leg distance/hours

Leg advisory

Fuel used/average MPG (KM/L)

Outside air temperature

Favorite Screen

The driver can set a favorite driving screen using the MY INFO switch. Press and hold the lower half of the MY INFO switch for just over one second to set the current screen as the favorite screen. A chirp will sound to verify the screen has been set.

Tap the lower half of the MY INFO switch to access the favorite screen. Tap the MY INFO switch again to leave the favorite screen.

NOTE: Only driving screens can be set as the favorite screen.

Parked Screens/Menus

Tap the MY INFO switch to drill down from each main screen to the submenus contained within it. Use the + and – switches to scroll through screens and select options. Tap the MY INFO switch again to exit each change screen. Press and hold the + switch or the upper half of the MY INFO switch to reset the counters for trip and fuel information.

The following screens are available when the parking brake is on (when the vehicle is parked). See Fig. 4.18 .

Odometer

Fig. 4.18, ICU4M Idle Hours, Trip Information, Fuel Information, and Engine Information Screens

Trip information including trip miles/hours, idle hours, average speed, leg miles/hours

Fuel information including fuel used, fuel economy, idle/PTO fuel usage

Engine information including engine miles/hours, engine/PTO gallons, oil level

Diagnostic information

Trip Information

Trip Information displays the trip miles, trip advisories, idle hours, leg miles, and leg advisories, in that order.

Fuel Information

Fuel information displays total fuel usage since the last reset, fuel mileage, and fuel consumed while idling or running the PTO, in that order.

Engine Information

Engine information displays engine mileage and hours, and total fuel consumption, in that order.

Diagnostic Information

If active fault codes are displayed on the diagnostic information screens, make a note of the fault code and text message, then take the vehicle to an authorized Freightliner service facility See Fig. 4.19 for a diagram of the diagnostic information screens.

Fig. 4.19, ICU4M Diagnostic Information and Service Information Screens

Service Information

The Service Information menu displays the next service interval, expressed in either miles or hours. See Fig. 4.19 . Service intervals can also be deactivated. For programming service intervals, see Setup Information , below.

NOTE: If the vehicle has exceeded the service interval, the miles(km)/hours remaining screen is replaced by the service was due screen, followed by the number of miles(km)/hours since the service was due.

Setup Information

The Setup Information menu allows the driver to program various features of the ICU4M. See Fig. 4.20 .

Fig. 4.20, ICU4M Setup Information Screens

The setup features include:

Service intervals (OFF/MILES/HOURS)

Outside temperature warning (ON/OFF)

Target MPG

LCD lamp (ON/OFF)

Driver message center brightness

Language (English/French/Spanish)

Units of measurement (English/Metric)

Driver select (ON/OFF)

Reset parameters to original settings

Vehicle Information Screens

The vehicle information screens display hardware and software information, including the Freightliner part number and switch ID of the ICU. See Fig. 4.21 .

Fig. 4.21, ICU4M Vehicle Information Screens

ICU4Me

Functions

ICU4Me settings and the driver message center are controlled using the ICU4Me control switch located on the dash, and the + and – switches mounted in the right-hand pod of the steering wheel. See Fig. 4.22 and Fig. 4.11 .

Fig. 4.22, ICU4Me Control Switch

The driver message center is divided into four sections. The odometer and cruise control status field are displayed along the bottom of the message center. When cruise control is active, the cruise control status field displays relevant cruise control icons and the set speed. If the vehicle is equipped with a manual transmission, time and temperature are displayed in the top left corner of the driver message center. The message field displays the driving screens and alert messages. See Fig. 4.23 .

If the vehicle is equipped with an automated transmission, the gear display is located in the top left corner of the driver message center. Time and temperature are displayed in the message field, unless an alert message is active or a driving screen has been selected. The odometer and cruise control status field are displayed along the bottom of the message center. See Fig. 4.24 . For information about transmission display options, see Chapter 15 .

1. Temperature and Compass
2. Message Field
3. Cruise Control Status Field
4. Odometer

Fig. 4.23, Driver Message Center Without Gear Display, ICU4Me

1. Gear Display
2. Temperature and Compass
3. Cruise Control Status Field
4. Odometer

Fig. 4.24, Driver Message Center with Gear Display, ICU4Me

Alert Messages

Alert messages are displayed in the message field to notify the driver when certain conditions occur. They include warnings, cautions, and other messages that require the driver’s attention. Not all alert messages are critical to the operation of the vehicle. More important messages take priority over less important messages.

NOTE: All alert messages follow the format shown in Fig. 4.25 .

Fig. 4.25, Parking Brake Alert Message

Press the + switch to acknowledge alert messages and revert to the previously displayed driving screen. The following alert messages will repeat intermittently until the condition is eliminated:

turn signal on

low voltage

no datalink

low transmission air pressure (Detroit transmissions only)

Driving Screens

Use the + and – switches on the steering wheel to navigate through the driving screens.

Fig. 4.26, Driving Screen Navigation, ICU4Me

With the parking brake off, only the driving screens are available. Use the + and – switches on the steering wheel to scroll through the driving screens; see Fig. 4.26 . To reset any values, press and hold the + switch.

Temperature

MPG information

Trip information

Leg information

Gauge display (if selected)

Predictive Cruise Control (optional)

Enter parked menus

Parked Screens/Menus

Park the vehicle and set the parking brake to access the parked menus and submenus. See Fig. 4.27 . To reset values in any of the menus, press and hold the + switch.

Trip information

Fuel information

Engine information

Diagnostics

Service information

Settings

Use the + and – switches on the steering wheel to navigate through the parked menus.

Fig. 4.27, Parked Menus, ICU4Me

ICU Information

A small numerical fraction is displayed in the upper right-hand corner of each screen to indicate the number of available screens or options to scroll through. See Fig. 4.28 . Press the upper half of the ICU4Me control switch to select a menu choice. Press the lower half of the control switch to back out of a selected menu or submenu. Use the + switch to scroll up, and the – switch to scroll down.

Fig. 4.28, Parked Menu Navigation, ICU4Me

When navigating the parked menus, the left side of the driver message center displays a "breadcrumb menu" to show the order of menus and submenus that have been selected during the current navigation.

Trip Information

The ICU can record data for one trip segment and one leg segment. When trip information is reset, all the leg information is reset as well.

Fuel Information

Using this menu, the driver can view the total fuel used since the last reset, the total idle gallons used since the last reset, and the average MPG since the last reset.

Engine Information

Using this menu, the driver can view engine miles, engine hours, gallons used, PTO hours, and PTO gallons. Engine oil level is optional for Detroit engines. The information contained in the Engine Information screens cannot be reset.

Diagnostics

Active and historical faults are displayed in the diagnostics menu. See Fig. 4.29 . If there are any active faults, the total number of faults is displayed in parenthesis next to the affected controller. To view specific active faults, press the upper half of the ICU4Me control switch on the dash. Press the upper half of the ICU4Me control switch to toggle between the text description and the failure code for each selected fault.

Fig. 4.29, Diagnostics Menu Navigation, ICU4Me

Service Information

Using this menu, the driver can enable, disable, and set service intervals for engine miles or engine hours. After enabling service intervals, select interval unit (miles or hours), and the interval duration.

Settings

The settings menu contains the controls for the following settings:

Display (includes brightness, contrast, display light, and night mode settings)

Gauge select

Language

Time zone

Self-test

Temperature warning enable/disable

Units

The Gauge Select submenu allows the driver to select certain gauge values for display in the message field while driving, See Fig. 4.30 . Use the + and – switches on the steering wheel to scroll through the list of available gauges, then press the upper half of the ICU4Me control switch to select a desired gauge. The ICU4Me control switch can also be used to uncheck boxes if necessary.

Using the Time Zone submenu, the driver can select supported time zone. Use the + and – switches to increment between time zones, see Fig 4.31 and Fig 4.32 . Press the upper half of the ICU4Me control switch to select the desired time zone. Press the lower half of the control switch to back out of a selected menu or submenu. See Table 4.5 for supported time zone list.

Once the operator has selected the time zone, the operator will be able to enable or disable the Daylight Savings, see Fig 4.33 . When the Daylight Savings is ‘ON’, a pop-up confirmation screen shall confirm the time by displaying the time the operator selected and 1 hour shall be subtracted from the current time which would make the offset for PST -7:00 hours instead of -8:00 hours.

When the Daylight Savings is selected as ‘OFF’ then no offset shall be applied to the current time.

Fig. 4.30, Selecting Gauges to Display, ICU4Me

Fig. 4.31, Time Settings

Fig. 4.32, Time Zone Selection

Fig. 4.33, Enable or Disable Daylight Savings

Time Zone	Abbreviation	From UTC (DST Off)	DST On	ICU4Me Display
Eastern Brazilian Time	EBT	-3:00	-2:00	East. Brazilian
Newfoundland Time	NT	-3:30	-2:30	Newfoundland
Atlantic Standard Time	AST	-4:00	-3:00	Atlantic Std.
Eastern Standard Time	EST	-5:00	-4:00	Eastern Std.
Central Standard Time	CST	-6:00	-5:00	Central Std.
Mountain Standard Time	MST	-7:00	-6:00	Mountain Std.
Pacific Standard Time	PST	-8:00	-7:00	Pacific Std.
Yukon Standard Time	YST	-9:00	-8:00	Yukon Std.
Alaska-Hawaii Standard Time	AHST	-10:00	-9:00	Hawaii Std.
Nome Time	NT	-11:00	-10:00	Nome Time
International Date Line West	IDLW	-12:00	-11:00	Western Date Line

Table 4.5, Supported Time Zones

ICU Information

The ICU Information screen displays the part numbers for the instrument cluster and software.