The Stability Module is a plug-in extension for the trailer ITCM ABS ECU which provides rollover
control or other active braking applications (by combination with additional ABS software and
hardware).
The Stability Module for ITCM is plumbed in series between the Control/Signal/Blue gladhand and
the control input or Port #4 on the ABS valve. The Stability Module communicates with the ITCM
ECU over the Haldex CAN bus for rollover control or other active braking applications.
The Stability Module contains sensors to monitor the Control/Signal/Blue line air pressure, as well
as, the suspension air pressure if equipped with an air bag suspension. The trailer’s movements are
monitored by an internal accelerometer and communicated to the ITCM ECU. If a threshold value
of acceleration is reached the ITCM will command the Stability Module to apply a series of brief
test pulses of control air to the ABS valve. The test pulses are just large enough to brake a freely
spinning wheel but not a loaded wheel end. If the tested wheel end responds to the test pulse
confirming the pending rollover a large brake application is initiated to slow and stabilize the
trailer.
System Overview
Introduction
STABILITY MODULE
INSTALLATION/SERVICE
GUIDE (L31288W)
TM
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