Air Controller Module
10
17730-310
OPTIMAAX
®
Lift Axle System Air Controller Module for Freightliner
SECTION 6
Air Controller Module
INSTALLATION
ASSEMBLY
1 . Prior to installation of air controller module, refer to Cautions and Warnings in the Important
Safety Notice Section of this publication
DO NOT WORK ON THE VEHICLE ELECTRICAL SYSTEM WITH THE VEHICLE POWER ON . DAMAGE TO
VEHICLE ELECTRICAL SYSTEM AND / OR UNEXPECTED AXLE MOVEMENT MAY RESULT .
NOTE
Refer to Wiring Diagram Section of this publication for basic routing / schematic of wires .
2 . Chock the wheels and exhaust all air from the vehicle supply tanks .
PRIOR TO AND DURING DEFLATION AND INFLATION OF THE AIR SUSPENSION SYSTEM, ENSURE THAT ALL
PERSONNEL AND EQUIPMENT ARE CLEAR FROM UNDER THE VEHICLE AND AROUND THE SERVICE AREA,
FAILURE TO DO SO CAN CAUSE SERIOUS PERSONAL INJURY, DEATH, OR PROPERTY DAMAGE .
3 . See additional Air Spring Cautions and Warnings in the Important Safety Notice Section of this
publication prior to deflating or inflating the air system .
4 . Ensure vehicle power is off .
5 . Remove 15 AMP fuse from slot F15 located in the dash board behind VPDM, see Figure 11-2
in System Operation Section of this publication .
6 . Ensure the wiring harness is plugged into the ECU and air controller manifold per the vehicle
manufacturer’s specifications . Harness connectors have printing (A,B,C,D,E) to indicate
which manifold connectors to mate with . The manifold is engraved with matching letters, see
Wiring Diagram Section of this publication .
■
The wiring harness pressure connector labeled
DRIVE
matches the manifold port
engraved
DRIVE
. The harness pressure connector labeled
LIFT
matches with the remain-
ing manifold port .
■
Ensure the wiring harness is secured as per vehicle manufacturer’s guidelines . For worn or
frayed harness, contact the vehicle manufacturer .
DO NOT WORK ON THE VEHICLE ELECTRICAL SYSTEM WITH THE VEHICLE POWER ON . DAMAGE TO
VEHICLE ELECTRICAL SYSTEM AND / OR UNEXPECTED AXLE MOVEMENT MAY RESULT .
7 . Connect the lift axle air plumbing to the OPTIMAAX air manifold per Air Manifold Diagram
Section of this publication .
8 . Install splash shield over OPTIMAAX ECU .
9 . See additional Air Spring Cautions and Warnings in the Important Safety Notice Section of this
publication prior to deflating or inflating the air system .
10 . Reconnect vehicle power and start the engine .
11 . Re-insert 15 AMP fuse in slot F15 located in the dash board behind VPDM .
12 . Allow compressor to generate full system pressure . With wheels still chocked, cycle vehicle
parking brake to verify system operation .
■
Lift axle should always remain on the ground with the parking brake set . At bobtail condi-
tion the lift axle should raise when the parking brake is released .
13 . Remove the wheel chocks .
