mode/reset button a second time for trip hours (en-
gine 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 tem-
perature 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 techni-
cians to retrieve fault codes and other diagnostic in-
formation 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 dis-
tance 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 ve-
hicle service is required. See
Fig. 4.8 for a the diag-
nostic and engine display screens.
To access the diagnostic screens, press and hold the
mode/reset button when the DIAG screen is dis-
played.
If the word SERVICE appears on the diagnostic mes-
sage display screen, service cycle screens are en-
abled. 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, ser-
vice 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 dis-
play 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 param-
eters. See Fig. 4.9.
To access the setup screens, press and hold the
mode/reset button when the SETUP screen is dis-
played.
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,isfor
resetting certain parameters to the original settings.
Hold the mode/reset button to reset the antilock brak-
ing system (ABS), SAMS roll call, automated trans-
mission display, transmission heartbeat, sensor fault
codes, and engine oil level screens. Press the mode/
reset button to sequence back to the odometer.
ICU4M
Functions
ICU4M settings and the driver message center are
controlled with the +/- INFO switch and the MY INFO
switch, mounted on the dash. See
Fig. 4.10. Press
the upper half of the +/- INFO switch to scroll up;
press the lower half of the +/- INFO switch to scroll
down. Press and hold the upper half of the +/- INFO
switch to reset or select a menu choice. When the
display is reset, an audible chirp sounds.
Some main features of the ICU4M include:
•
Gauges that sweep 270 degrees and have
pointers lit by an LED.
•
Service intervals that are programmable via
two dash-mounted switches.
Instruments
4.13
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