Ignition Switch and Key
The ignition switch has four positions: OFF, ACC (ac-
cessory), ON, and START. See
Fig. 5.1. The ignition
key also locks and unlocks the cab doors, baggage
door(s), and if equipped, the bunk door(s).
In the OFF position, the ignition switch is vertical.
The key can be inserted and removed only in the
OFF position.
The following functions are operable when the igni-
tion switch is in the OFF position (regardless of
whether the key is inserted):
•
low-beam headlights
•
taillights
•
brake lights
•
road lights
•
dome lights
•
clearance lights
•
hazard warning lights
•
turn signals
•
utility lights
•
baggage compartment lights
•
spotlights
•
electric horn
•
clock
•
refrigerator
•
CB radio
•
power mirrors
•
power receptacle
•
fuel heater
•
electric oil pan heater
•
electric or diesel-fired engine coolant pre-
heater
Turn the key counterclockwise to reach the ACC po-
sition. In addition to all the functions that are oper-
able in the OFF position, the following functions are
operable when the switch is in the ACC position:
•
radio/stereo system
•
heater and A/C fan
•
mirror defog
•
windshield fan
•
ether start system
•
air dryer
•
backup lights
Turn the key clockwise past the OFF position to
reach the ON position. When the ignition is turned
on, the following actions should occur:
•
electronic gauges complete a full sweep of
their dials
•
warning and indicator lamps illuminate, then
are extinguished
•
audible alert sounds for approximately four
seconds or until sufficient air pressure builds
up in the primary and secondary air systems
•
software revision level of the ICU is displayed
on the driver message center, followed by any
active faults
IMPORTANT: If any red or amber warning or
indicator lamps do not illuminate during the ICU
self-check or do not extinguish after the self-
check completes, take the vehicle to an autho-
rized Daimler Trucks service facility as soon as
possible.
IMPORTANT: Do not crank the engine until the
ICU gauge sweep is complete.
07/19/2006 f610805
Fig. 5.1, Ignition Switch
Driver Controls
5.1
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