Instrumentation Control Unit:
ICUC
The instrumentation control unit (ICU) provides the
driver with engine and vehicle information. A New
Cascadia vehicle can be equipped with either an
ICUC or ICC5. See
Fig. 3.1 for a typical ICUC
layout.
This section provides general system and operating
instructions for ICUC components. Following sections
provide more detailed information.
ICUC
The instrument cluster unit (common), or ICUC, is
comprised of six physical gauges, indicator lamps
(telltales), a six inch portrait driver display screen,
steering wheel mounted switches, and audible warn-
ing systems. Warning and indicator lamps illuminate
in red (warning), amber (caution), green (status on),
or blue (high-beam headlights active).
The driver display screen provides information on
various vehicle systems as well as warnings, cau-
tions, and notifications on systems status.
Ignition Sequence
When the ignition is turned on, the ICU runs a self-
check. Observing the ignition sequence is a good
way to ensure the ICU is functioning properly.
IMPORTANT: Do not crank the engine until the
ICU self-check is complete.
ICUC
NOTE: Air gauges in the ICUC do not complete
a sweep of their dials during the ignition se-
quence.
When the ignition is turned on, the following actions
should occur in the ICUC:
•
Freightliner and engine logo displays on the
driver display until startup is complete
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1
3
4
5
6
2
A B C D E F
1. Speedometer
2. Coolant Temperature Gauge
3. Primary and Secondary Air
Pressure Gauge
4. Fuel and DEF Level Gauge
5. Engine Oil Pressure Gauge
6. Tachometer
7. Driver Display
A. Home
B. Drive Time Systems
C. Vehicle Operations
D. Maintenance
E. Infotainment
F. User Settings
Fig. 3.1, Instrument Cluster Overview - ICUC
Instruments
3.1
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