•
Coolant temperature rises above the maximum
preset value.
•
Air pressure falls below about 70 psi (483
kPa).
•
Parking brake is set with the vehicle moving
faster than two miles per hour.
•
System voltage falls below 12 volts.
•
Door is open with the headlights on and the
parking brake off.
•
Driver seat belt is not fastened with the parking
brake off (optional).
•
Outside temperature falls below 35°F (1.7°C)
(optional).
Warning and Indicator Lights
There can be up to 28 telltales installed in the ICU. If
an optional lamp is not requested, the position is
blank.
See
for a list of standard and commonly
used warning and indicator lamps.
Warning and indicator lamps illuminate in red (dan-
ger), amber (caution), green (status advisory), or
blue (high-beam headlights active).
IMPORTANT: Depending upon local jurisdic-
tional emissions guidelines, vehicles and/or en-
gines that are domiciled outside of the U.S. and
Canada may not be compliant with EPA07,
EPA10, GHG14, or GHG17 regulations. Non-
compliant vehicles may not be equipped with all
of the lamps shown in
IGNITION SWITCH
PARKING BRAKE
RELEASED
IF NO FAULTS
WERE DETECTED
IF FAULT DETECTED
APU 190
123456.7
12.3 VOLTS
123456.7
12.3 VOLTS
MI
MI
01/18/2012
f040420c
PARKING BRAKE
RELEASED
TURNED TO ON
ICU PERFORMS
SELF−TEST
Fig. 3.3, Ignition Sequence
Instruments
3.3
