STABILITY MODULE
INSTALLATION/SERVICE
GUIDE (L31288W)
TM
Page 20
4S/2M Axle-By-Axle Configuration with
Stability Module (Multi-Axle Trailers)
This is a recommended configuration for spread axle applications. For
Axle-By-Axle ABS configurations and Stability Module; ITCM must be
configured for this application with the DIAG+ Software.
Recommended speed sensor wheel locations are
shown in the figures below.
Sensor (S1A, S1B) should be installed on Road Side.
Sensor (S2A, S2B) should be installed on Curb Side.
Modulator Valve is plumbed to the trailing axle(s).
Modulator Valve is plumbed closest to the King Pin.
Make sure sensors are pushed firmly against the
exciter ring.
Note:
The A Sensors must go with the
Modulator Valve and the B Sensors must go with
the Modulator Valve.
*
Note:
The pneumatic tube between Stability
Module Port 2 and the ABS Control Port 4
should be no longer than 80” (2 m) in total length f
or a 3/8-inch diameter tube. Refer to Page 14
for details on the pneumatic connections of
the Stability Module.
Legend
Air Hose Line:
Modulator Valves:
Stability Module:
Speed Sensors: S1A, S2A, S1B, S2B
21
22
21
22
21
22
Curb
Road
Tri-Axle
(Air or Spring Suspension)
----- 4S/2M -----
Tandem Axle
Curb
(Air or Spring Suspension)
Road
----- 4S/2M -----
22
21
S2B
S1B
S2A
S1A
21
21
22
S2A
S1A
S2B
S1B
Quad-Axle
Curb
(Spring Suspension)
Road
----- 4S/2M -----
S2B
S1B
22
S2A
S1A
21
Full Trailer
Curb
(Air or Spring Suspension)
Road
----- 4S/2M -----
22
21
S2B
S1B
S2A
S1A
Quad-Axle
Curb
(Air Suspension)
Road
----- 4S/2M -----
S2B
S1B
22
S2A
S1A
21
ITCM
S2B
S1A
21
S1B
S2A
22
SM
SM
SM
SM
SM
*
*
*
*
