Instrumentation Control Units; Ignition Sequence - freightliner cascadia Driver Manual

Instruments

Instrumentation Control Units

The instrumentation control unit (ICU) provides the
driver with engine and vehicle information. It is com-
prised of standard and optional gauges, an audible
warning, a driver message center, and a lightbar con-
taining warning and indicator lamps (also known as
telltales). Warning and indicator lamps illuminate in
red (danger), amber (caution), green (status advi-
sory), or blue (high-beam headlights active).
Cascadia vehicles are equipped with an ICU3, ICU4,
ICU4M, or ICU4Me. See
Fig. 4.3 for typical ICU layouts.
The following headings in this chapter provide addi-
tional information and operating instructions for ICU
components:
•
"Warning and Indicator Lights"
•
"Instruments"
3
2
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09/10/2009
1. Transmission Temperature Gauge
2. Coolant Temperature Gauge
3. Engine Oil Pressure Gauge
4. Driver Message Center
5. Fuel/DEF Level Gauge
4.1
Fig. 4.1, Fig. 4.2, and
4
9
6. Primary Air Pressure Gauge
7. Secondary Air Pressure Gauge
8. Speedometer
9. Tachometer
Fig. 4.1, ICU3 Instrument Cluster (EPA10 shown)
•
"Driver Message Center"

Ignition Sequence

When the ignition is turned on, the ICU runs a self-
check. See Fig.
is a good way to ensure the ICU is functioning prop-
erly.
IMPORTANT: Do not crank the engine until the
ICU self-check is complete.
NOTE: Air gauges do not complete a sweep of
their dials during the ignition sequence.
When the ignition is turned on, the following actions
should occur:
•
electronic gauges complete a full sweep of
their dials
11
10
4.4. Observing the ignition sequence
5
6
12
7
8
10. High Beam Indicator
11. Driver Display Screen
12. Mode/Reset Switch
13. Satellite Gauges
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