Instruments
1
09/27/95
1. Main Dash Panel
2. Lightbar
3. Driver Message Center
4. Warning and Indicator Lights
Fig. 4.3, ICU2M Instrument Cluster (typical)
IF NO FAULTS
WERE DETECTED
123456.7
MI
12.3 VOLTS
PARKING BRAKE
RELEASED
123456.7
MI
12.3 VOLTS
01/18/2012
Fig. 4.4, ICU Self-Check
•
Air pressure falls below approximately 70 psi
(483 kPa).
•
Parking brake is set with the vehicle moving
faster than two miles per hour.
•
System voltage falls below 12 volts.
4.3
2 3
4
f600991
IGNITION SWITCH
TURNED TO ON
ICU PERFORMS
SELF−TEST
IF FAULT DETECTED
APU 190
PARKING BRAKE
RELEASED
f040420c
•
Door is open or the headlights are on, with the
parking brake off.
Warning and Indicator Lights
The ICU lightbar has three or four rows of warning
and indicator lights with icon symbols, depending on
the ICU. The positions of the lights may vary for the
different ICU's, but the telltales are standard for all
applications. See
Table 4.1
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 may not be
equipped with all of the lamps shown in
Table
4.1.
Engine Protection System
WARNING
When the red STOP engine lamp illuminates,
most engines are programmed to shut down au-
tomatically within 30 seconds. The driver must
immediately move the vehicle to a safe location
at the side of the road to prevent causing a haz-
ardous situation that could cause bodily injury,
property damage, or severe damage to the en-
gine.
See
Fig. 4.5
for an explanation of the aftertreatment
system (ATS) warning indicators, and actions re-
quired to avoid further engine protection steps.
The STOP engine lamp illuminates when the engine
protection system is activated in one of two ways. On
some engines, the engine protection system will der-
ate the engine, allowing it to run at lower rpm and
slower vehicle speed. Drive the vehicle to a safe lo-
cation or to a service facility.
IMPORTANT: Safely bring the vehicle to a stop
on the side of the road and shut down the en-
gine as soon as the red light is seen. If the en-
gine shuts down while the vehicle is in a haz-
ardous location, turn the key to the OFF position
for a few seconds, then restart the engine and
move the vehicle to a safer location.
for a listing of standard
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