5
Figure 7 – Return to Normal Operation
TLV-9000
™
Valve Fills the Suspension Bags & Exhausts the Lift Bags
MANUAL OVERRIDE FEATURE
The TLV-9000
™
lift axle valve is controlled by the Bendix
®
trailer ABS/TRSP
ECU, via a wiring harness, to provide lift
axle operation based on load sensing logic programmed
into the ECU. During normal operation the driver does not
control the lift axle. For drop-axle control Bendix offers a
manual override harness available from any authorized
service parts outlet.
Refer to Figure 8.
Figure 8 – Wire Harnesses
Connects to
the ECU
Connects to the
Pressure Switch
or the Manual
Override Harness
If Used
Bayonet Connector
(Connects to the
Bendix
®
TLV-9000
™
Lift Axle Valve
)
Bendix
®
TABS-6
™
Advanced Lift Axle Control Harness
A
Connects to
the Lift Axle
Harness "A"
Connects to
the Pressure
Switch
Bendix TABS-6 Advanced Override Harness
Connects to
the Toggle
Switch
The override harness can simply be connected to the
existing lift axle wiring harness to manually complete the
electrical ground loop circuit. This function allows the
driver to drop the lift axle when desired (as opposed to
load sensing) and remain on the ground as long as the
switch is activated. When the switch is deactivated, the
axle will only raise if the trailer payload is under the weight
requirement (normal load sensing operation). The switch
is provided by trailer OEM only.
Bendix
®
TR-3
™
Lift Axle Service
Shut-Off Valve
To Lift Axle
Service
Relay Valve
Control Port
Trailer
ABS
Module
Suspension Bag
Lift Bag
Lift Axle
Lift Axle
