Ignition Sequence
When the ignition is turned on, the ICU runs a self-check. Observing the ignition sequence is a good way to ensure the ICU is functioning properly.
Important: Do not crank the engine until the ICU self-check is complete.
ICUC
Note: Air gauges in the ICUC do not complete a sweep of their dials during the ignition sequence.
When the ignition is turned on, the following actions should occur in the ICUC:
-
Freightliner and engine logo displays on the driver display until startup is complete
-
Speedometer and tachometer complete a full sweep of their dials
-
Warning and indicator lamps illuminate, then are extinguished (if not active)
-
Audible alert sounds for any active faults
-
Active alerts are displayed on the ICUC screen.
If the ICUC receives active fault codes, it displays them one after the other until the ignition is turned off. The alerts are displayed until they are acknowledged. If there are no active faults, the ICUC displays the home screen after the self-check completes.
Important: If any red or amber warning and indicator lamps do not illuminate during the ICUC self-check or do not go out (if not active) after the self-check completes, take the vehicle to an authorized Freightliner service facility as soon as possible.
If active faults are present, take the action outlined in "Warnings, Indicators, and Messages" tables in this chapter, then take the vehicle to an authorized Freightliner service facility as soon as possible.