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7-character LCD that normally shows odometer read-
ings and, below that, a smaller 3-character LCD that
shows voltmeter readings. Warning messages and
diagnostic fault codes will also appear in the display
screen.
Information provided by the driver display screen in-
cludes:
•
odometer readings (in miles or kilometers)
•
trip and total engine distance
•
trip and total engine hours
•
service screens
•
fault code displays
•
warning messages
Ignition Sequence
When the ignition is turned on, the ICU3 runs
through the ignition sequence. See
Fig. 3.3
. First,
the ICU3 performs a self-test, looking for active fault
codes and displays them, if any, one after the other
until the engine is started or the ignition switch is
turned off. If there are no active fault codes, the
driver display screen displays the odometer.
When the ignition is first turned on, all the electronic
gauges complete a full sweep of their dials, the
warning and indicator lamps illuminate, and the au-
dible warning sounds for three seconds. On EPA10-
compliant vehicles, the DEF level indicator illumi-
nates all segments green, then turns them off one at
a time before turning the left most segment amber
then red.
5
4
f610578
1
2
3
10/11/2001
NOTE: Instruments and controls, and their locations, may vary from those shown.
1.
Left-Hand Control Panel
2.
ICU3
3.
Right-Hand Control Panel
4.
Auxiliary Dash Panel
5.
Climate Control Panel
Fig. 3.2, Dash Panel Layout (typical)
Instruments
3.2