System Operation
16
17730-310
OPTIMAAX
®
Lift Axle System Air Controller Module for Freightliner
SECTION 11
System Operation
Prior to operating the system, refer to Safety Precautions in the Important Safety Notice Section
of this publication .
SYSTEM FAULT
The OPTIMAAX is designed with features to detect a fault in system operation which is separate
from the air controller module . The warning light on the dashboard, see Figure 11-1, indicates
either of the following conditions:
FIGURE 11-1
A FLASHING WARNING
LIGHT
indicates a
system fault
. Refer to the
Diagnostic Tool Software Section for reading
ECU
system faults and the
Troubleshooting Guide Section of this publication .
A SOLID WARNING LIGHT
indicates an
overload condition
of the
suspension . It may be beneficial to weigh the vehicle to verify overload
condition . The OPTIMAAX system is designed to help ensure that the lift, drive,
and steer axles operate within the proper weight parameters . An overload
light will indicate an overload on at least one of the axles .
Prior to service
of the lift axle, adjacent components or the air controller module:
a . Turn ignition off .
b . Ensure the lift axle is on ground .
c . Remove 15 AMP Fuse, located in the dash behind the vehicle power distribution module
(VPDM) in location F15, which houses the main fuse and relay center, see Figure 11-2 .
d . Exhaust all pressure in lift axle air springs and vehicle air system .
NOTE
The OPTIMAAX air controller module weight thresholds to raise and deploy the lift axle are set by
vehicle manufacturer .
FIGURE 11-2
Vehicle Power
Distribution Module
(VPDM)
F15
F15
Remove 15 AMP Fuse
from slot F15,located in the
dash board behind the VPDM
