•
fuel level (low)
•
transmission oil temperature (high)
Other available gauges include:
•
tachometer
•
engine oil temperature
•
transmission oil temperature
•
axle temperature; forward-rear, and rear-rear
•
ammeter
•
air pressure; primary, secondary, application,
and suspension
•
pyrometer
•
turbo boost
Buzzer and Chime
A buzzer sounds for three seconds during the self-
test at start-up, and when the following conditions
exist:
•
low air pressure
•
low oil pressure
•
high coolant temperature
•
the parking brake is applied and the vehicle is
moving at a speed of at least 2 mph (3 km/h)
A chime sounds when the parking brake is off and
the door is open, or when the headlights are on and
the door is open.
Ignition Sequence
When the ignition key is turned on, the ICU4/ICU4-2
begins a self-test. During this process, all gauges
controlled by the cluster sweep to full scale and re-
turn, the buzzer sounds for three seconds, the fasten
seat belt warning light illuminates for 15 seconds,
and the battery voltage, low air pressure, and parking
brake warning lights illuminate then turn off. Then the
software revision level of the ICU4/ICU4-2 is dis-
played, followed by active faults, if any, then the
odometer display.
Mode/Reset Switch Functions
The mode/reset switch controls the display of the
odometer, trip miles and hours, engine miles and
hours, service cycle screens, fault code screens, and
oil level screens (on some Mercedes-Benz engines;
if equipped and enabled).
Push the switch to scroll through mode selections,
and hold the switch to reset trip miles or hours while
they are displayed. See Fig. 2.5. With the parking
09/05/2006
1
2
3
4
5
67
89
10
11
12
13
1415
16
17
1819
f610817
CHECK STOP
1. Left-Turn Signal
2. Check Engine Indicator
3. Optional Indicator
4. Stop Engine Warning
5. High Exhaust System
Temperature (HEST) Warning
6. Diesel Particulate Filter Status
Lamp (DPF)
7. Message Display Screen
8. Mode/Reset Switch
9. Tractor ABS Indicator
10. Trailer ABS Indicator
11. Check Transmission Indicator
12. Optimized Idle Indicator
13. Right-Turn Signal
14. Low Air System Pressure Warning
15. High-Beam Indicator
16. Parking/Emergency Brake
Warning
17. Fasten Seat Belt Warning
18. Malfunction Indicator Light (MIL)
19. Low Vehicle Battery Voltage
Fig. 2.4, ICU4-2 Dash Message Center (typical), EPA07 Compliant
Instruments and Controls Identification
2.5
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