High Coolant Temp
This message and an audible warning come on
whenever the engine coolant temperature exceeds
the maximum allowable temperature.
If high coolant temperature is detected during the
ignition sequence, it displays as an active fault and
the alert screen does not appear. After 30 seconds,
this message displays again.
Low Voltage
On some vehicles, this optional message and an au-
dible warning come on whenever the ICU detects a
low voltage condition.
Faulty Speedo Gauge
This message is displayed when the system detects
a faulty speedometer. This becomes the default
screen, and vehicle speed is displayed as a digital
readout at the bottom left of the screen. All other
screens and functions operate normally.
Recirc Mode Engaged/Provide Fresh Air
The Recirc Mode Engaged message appears when-
ever recirculated air is selected on the fresh/air recir-
culation switch or the air circulation switch is rotated
to the maximum air conditioning position. It displays
one time only for seven seconds. It notifies the driver
that recirculated air is being used and that fresh air
needs to be provided after 20 minutes.
If fresh air is not provided after 20 minutes, Provide
Fresh Air is displayed. It displays for seven seconds
approximately every four minutes until the driver se-
lects fresh air on the fresh/air recirculation switch or
rotates the air circulation switch away from maximum
air conditioning. See
Chapter 4
for detailed operating
instructions for the heater/air conditioner.
Low Fuel Level
The ICU continuously monitors fuel level. When the
fuel level drops to 1/8th full, the word Warning
flashes on the message display screen above the
low fuel alert.
Turn Signal On
This message (the audible warning is optional) ap-
pears whenever the turn signal remains on beyond a
preset time or distance traveled.
To dismiss this message, either turn off the turn sig-
nal or press any button on the keypad.
Service Warnings
Service warning screens display during the ignition
sequence and indicate that a service interval has
been reached or exceeded and maintenance is re-
quired. The messages may indicate the number of
miles (KM) or hours until the next required service or,
once passed, the number of miles (KM) or hours ago
that maintenance should have been performed. The
ICU2M can be programmed using ServiceLink to
generate service warnings in either miles or hours,
but not both.
No Datalink Activity
This message appears whenever the datalink is not
receiving data. If the condition persists, take the ve-
hicle in for service as soon as possible to discover
the cause of the problem.
Mobile Screens
The following screens are available when the parking
brake is off (when the vehicle is mobile) and no ac-
tive fault codes are found. Press the appropriate but-
ton on the keypad to display one of the mobile
screens.
•
trip miles and hours
•
fuel used and average MPG
•
leg miles and hours
08/17/95
f040307
WARNING
LOW OIL PRESSURE
RETURN TO
NORMAL
NORMAL OPERATION
SCREEN
PRESS ANY KEY
INITIAL
WARNING
BLINKING
WARNING
OPERATION
NOTE: All Alert Screens follow this format.
Fig. 2.13, ICU2M Alert Screen: Low Oil Pressure
Instruments and Controls Identification
2.12