7
Figure 11 – Testing Aux Output with the Switch On
Figure 13 – Test Complete
Figure 12 – Testing Aux Output with the Switch Off
Launch the Bendix
®
ACom
®
diagnostic software program
and select component test, LAC1 Test on Configured AUX
I/O, to perform functionality/operational checks or diagnose
lift axle issues. For general override, select LL_ALL Test
on Configured AUX I/O.
Refer to Figure 10.
This test will confirm if power is applied to the source.
If the output switch is not on, disconnect the electrical
connector from the lift axle valve and manually
apply 12 VDC to determine if the problem indicates
electrical wiring or the TLV-9000
™
lift axle valve.
For troubleshooting information refer to the Bendix
®
TABS-6
™
Advanced Service Data Sheet referenced in
this document.
Refer to Figure 11.
The next test will confirm if the power output is turned off
at the source.
Refer to Figure 12.
A check mark next to the test description indicates a
successful test completion.
Refer to Figure 13.
2 - MANUAL (NON-SOFTWARE) METHOD OF TESTING
VALVE OPERATION
1. Block the vehicles wheels and fully charge the tractor
and trailer air system. The trailer must not be loaded
for this test.
2. Apply the vehicle parking brakes.
3. With the wiring harness disconnected from the
TLV-9000 lift axle valve, disconnect both air lines
from the lift bag delivery ports (Ports 23) and install
test plugs into the fittings. Apply a soap solution around
the opening of the exhaust port and check for leakage.
Leakage must not exceed a one (1) inch bubble in less
than five (5) seconds around the exhaust seal.
4. Remove the test plugs and reconnect both air lines back
to the lift bag delivery ports (Ports 23).
Apply power
(12 VDC) via a separate power supply to the TLV-9000
valve. The lift axle must rise to the desired position.
5. With the lift axle in the raised position, disconnect both
air lines from the suspension bag delivery ports (Ports
21) and install test plugs into the fittings. Apply a soap
solution around the opening of the exhaust port and
check for leakage. Leakage must not exceed a one
(1) inch bubble in less than five (5) seconds around the
exhaust seal.
6. Remove the test plugs and reconnect both lines back
to the suspension bag delivery ports (Ports 21). Turn
off the power to the TLV-9000 lift axle valve. The lift
axle should return to its original position.
If the valve does not function as described; or if leakage is
excessive, replace the valve.
