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. 4.1
,
Fig. 4.2
, and
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"
•
"Driver Message Center"
Ignition Sequence
When the ignition is turned on, the ICU runs a self-
check. See
Fig. 4.4
. Observing the ignition sequence
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
09/10/2009
f610864a
1
2
3
4
5
6
7
8
9
13
10
11
12
1.
Transmission Temperature Gauge
2.
Coolant Temperature Gauge
3.
Engine Oil Pressure Gauge
4.
Driver Message Center
5.
Fuel/DEF Level Gauge
6.
Primary Air Pressure Gauge
7.
Secondary Air Pressure Gauge
8.
Speedometer
9.
Tachometer
10. High Beam Indicator
11. Driver Display Screen
12. Mode/Reset Switch
13. Satellite Gauges
Fig. 4.1, ICU3 Instrument Cluster (EPA10 shown)
Instruments
4.1
Summary of Contents for cascadia
Page 1: ...Driver s Manual CASCADIA Part Number STI 478 Publication Number STI 478 6 ...
Page 106: ...9 Cab Features Windows 9 1 Mirrors 9 1 Cab Amenities 9 1 Sleeper Amenities 9 2 ...
Page 163: ...16 Drive Axles Differential Locks 16 1 Two Speed Drive Axles 16 2 ...
Page 167: ...17 Steering System Power Steering System General Information 17 1 Power Steering Systems 17 1 ...
Page 180: ...19 Trailer Couplings Air Suspension Dump Valve 19 1 Holland Trailer Coupling 19 1 ...
Page 229: ...26 Specifications Fuses and Relays 26 1 Replacement Bulbs 26 3 Fluids and Lubricants 26 4 ...