freightliner NEW CASCADIA 2016, Driver Manual

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NOTICE
Never exhaust air from the suspension while
driving. When the air is exhausted, the suspen-
sion will not absorb road shocks, and compo-
nents may be damaged.
A red LED in the switch is illuminated when the sus-
pension is deflated.
ECAS Dash Switches
Vehicles with Electronically Controlled Air Suspension
(ECAS) may be equipped with either dash switches
or a remote control unit, not both. See
Figure 4.28
and Table 4.1 .
LOAD XFER (Load Transfer)
This switch controls the ECAS manual load transfer
function by adjusting suspension air pressure. Use
this function to minimize wheel slippage in road con-
ditions where traction may be a concern.
The ECAS load transfer feature applies the maxi-
mum available vehicle load on the drive axle, up to
the maximum allowable limit, determined by the
gross axle weight rating (GAWR). In bobtail or with a
loaded trailer less than the GAWR, the tag axle sup-
ports a negligible load while the drive axle supports
nearly the full weight. Above the GAWR, the drive
axle is loaded with approximately the maximum al-
lowable load and the tag supports the remainder.
Load transfer mode can be deactivated by holding up
on the dash switch for 4 seconds. Load transfer
mode will automatically deactivate when the vehicle
reaches 45 mph (72 kmh).
For vehicles equipped with the ICUC, when load
transfer mode is active, "Load Transfer" will display
in the message field of the driver display. See
Figure
4.29 .
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 ICUC, messages
about the ride height status will display in the mes-
sage field of the driver display. See
Figure 4.30 .
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
f611473 11/16/2016
1
2
LOAD
XFER
1. Load Transfer 2. Suspension Height
Fig. 4.28, ECAS Dash Switches
11/09/2016 f611472
Fig. 4.29, Load Transfer Notification, ICUC
Driver Controls
4.16