Suspension Height
If the suspension is at normal height:
•
each up press increases the suspension height
an increment, unless the suspension is at
maximum height
•
a down press lowers the suspension to its low-
est set-point (usually axle stops)
If the suspension is below normal height:
•
an up press increases the suspension height to
normal ride height
•
a down press does nothing; the suspension is
already at its lowest point
If the suspension is above normal height:
•
each up press increases the suspension height
an increment, unless the suspension is at
maximum height
•
a down press lowers the suspension to normal
ride height
On vehicles equipped with the ICU, messages about
the ride height status will display in the driver display.
See
Figure 4.28.
If the suspension is outside normal ride height
(amber lamp on), the ECAS system will automatically
return the suspension to normal ride height when
vehicle speed reaches or exceeds a set speed (usu-
ally set to 5 mph).
ECAS Standby Mode, Dash Switch
Once the key is turned off, the ECAS will enter
standby mode, remaining powered and adjusting to
level and load changes for 1 hour. To cancel standby
mode on vehicles with ECAS dash switches, turn the
key from OFF to ON to OFF in less than 1.5 sec-
onds. Confirm the deactivation of standby mode by
pressing the suspension height switch, which should
not adjust the suspension.
ECAS Remote Control Unit
Some vehicles equipped with Electronically Con-
trolled Air Suspension (ECAS) have a remote control
unit to lower and raise the rear suspension. See
Table 4.1 for keys and functions.
If the suspension is outside normal ride height
(amber lamp on), the ECAS system will automatically
return the suspension to normal ride height when
vehicle speed reaches or exceeds a set speed (usu-
ally set to 5 mph).
Messages about the ride height status will display in
the ICU driver display.
ECAS Standby Mode, Remote Control
Once the key is turned off, the ECAS will enter
standby mode, remaining powered and adjusting to
level and load changes for 1 hour. To cancel standby
mode on vehicles with a remote control, turn on the
remote control then hold the STOP key on the re-
mote for 2 seconds. Confirm the deactivation of
standby mode by attempting to turn the remote on
and adjust the suspension, which should not be pos-
sible.
11/09/2016
f611472
Fig. 4.27, Load Transfer Notification - ICUC
f61143406/29/2016
Fig. 4.28, Example of Ride Height Message - ICUC
Driver Controls
4.14
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