Degrees of Vertical

2. R
econnect all of the air hoses and plugs to the module.
Depending on the installation, additional plugs may
be necessary. Thread sealant products that contain
PTFE may be used; however, thread sealant tape is not
recommended as there is a potential for tape material
entering the valve and affecting the valve’s operation.
Ensure no thread sealant enters the valve. All air hoses
and fittings should be checked for leaks prior to returning
the vehicle to service.

Driving
Direction

Figure 16 – Installation on the Trailer (Longitudinal)
40" m)
(1 m)
from
mid-pointbetween
between the
100 in. ±(2.5
from
midpoint
theaxles
axles

10°
10°

Frame-Mount Module: The TABS‑6 ADV MC module uses
three (3) Class-8 steel M10x1.5 lock nuts with washers,
torqued to 354 ± 44.4 in.-lbs (40±5 N•m).

+ 2(5in.cm)
± 2"
(5.08center
cm)
from
from
center
of trailer

3. R
econnect the ECU power, auxiliary power (if present),
and WSS electrical connectors to the ECU. Apply a small
amount of non-conductive electrical grease to each
connector pin before reconnecting.
NOTE: The WSS must follow the orientation of the module
as shown in Figure 18 for fixed-axle trailers. Where a lift
axle is present, and sensors are to be installed on that
axle, secondary sensors “SE” and “SF” must be used
for the lift axle.
•

It is necessary to fix the WSS to the orientation of
the lateral acceleration sensor for plausibility checks
between the sensors.

•

If the WSS location does not match the orientation
of the TABS‑6 ADV MC module shown in Figure 18,
a DTC will be generated and the ABS indicator lamp
will be illuminated.

•

efer to the raised lettering on the casting body,
R
or see Figure 18, for WSS locations, “S-C,” “S-D,”
“S-E,” and “S-F.”

of trailer

The TABS‑6 ADV MC or MC LITE module must be located no more than
40 inches from the mid-point between the axles, and within two inches
from the center line of the trailer (for TRSP variants, if there is an offset
from the centerline, it should be configured on the ECU).

Figure 17 – Installation on the Trailer (Center Line)

4. L
eakage and operational tests must be performed before
returning the vehicle to service.

20

Right - “Curb-Side”
Sensor
“S-F”

Right - “Curb-Side”
Sensor
“S-D”

P21

Driving
Direction

Sensor
“S-C”

Driving

Sensor
“S-C”
Left - “Road-Side”

P22

Direction

P22

Sensor
“S-E”

Sensor
“S-E”

P21

Sensor
“S-D”

Sensor
“S-F”
Left - “Road-Side”

Figure 18 – WSS Locations

21

LEAKAGE AND OPERATIONAL TESTS

For NPTF fittings, the use of a thread sealant is
recommended. This can be a pre-applied or a handapplied sealant product (with PTFE). When using a
hand-applied sealant, use caution so as not to over-apply.
Always follow the fitting manufacturer’s pre-applied or
hand-applied thread sealant recommendations. Use of
PTFE tape is not approved and will void the Bendix ABS
and the Bendix TRSP valve warranty.
1. Before performing the leakage tests, block the wheels.
2. Fully charge the ABS and verify proper brake adjustment.
3. M
ake several trailer brake applications and check for
prompt application and release at each wheel.
4. Perform the leak-down test procedure:
•

et up the pressure circuits to apply supply (red)
S
line and service pressures with a regulator and a
pressure gauge on each line.

•

pply 110 - 120 psi to the trailer supply (red) circuit
A
to release the parking brake.

•

Apply the service brakes at 90 - 95 psi.

•

Identify and record the pressure from the gauge on
the supply (red) line and the service line.

•

•

22

ut off the pressure to the supply (red) line before
C
the pressure gauge and monitor for the pressure to
drop. If the pressure drops less than 3 psi in one
(1) minute, the supply (red) line test passes. If the
pressure drops more than 3 psi in one (1) minute,
identify and correct the source of the leak on the
supply (red) line.
If the supply (red) line test passes, repeat the test
for the service line. If the pressure drops less than 2
psi in one (1) minute, the test passes. If the pressure
drops more than 2 psi in one (1) minute, identify and
correct the source of the leak on the service line.

•

soap and water solution can be used to identify
A
sources of leaks on the fittings and valves.

•

If available, a Lite-Check® machine can be used to
perform the leak-down test.

5. A
pply power and monitor the power-up sequence to verify
proper system operation.
6. C
alibrate and set the odometer parameters, if necessary,
using a diagnostic tool.
7. R
efer to Appendix A and record all applicable information
prior to programming the TABS-6 ADV MC or MC LITE
module.
8. P
erform an installation test using ACOM DIAGNOSTIC
SOFTWARE. Minimum tests that are required to verify
the proper installation of the ABS/TRSP system are:
•
ECU Information: This test provides the user with
specific ECU information. It is required that no
Diagnostic Trouble Codes (DTCs) (other than “endof-line test not completed”) are present and that the
ECU has been configured.
•
Wheel End Sequence Test: During this test, checks
are carried out that verify the correlation of the wheel
installed with a WSS and the pressure modulator that
controls the pressure to the associated brake.
•
Lateral Acceleration Test: The installation angle
information is retrieved from the ECU and compared
to the predefined limits (± 5°). This test verifies the
unit is installed as close to horizontal as possible.
NOTE: TABS-6 MC LITE does not support lateral
acceleration, but should still follow TABS-6 ADV MC
installation instructions and recommendations.
•
Pressure Sensor Test: During this test, checks are
carried out that verify the proper response is received
from the pressure sensors during a brake application.
•
Axle Load Sensing Test (Air Ride): The test has
the user verify the expected measurement of the load
pressure sensor, Port 42, for air ride suspensions. The
program provides the reading of the sensor.
•
Mechanical Load Sensor Test (Mechanical Spring
Ride): The test has the user verify the expected
measurement of the spring deflection sensor. The
program provides the reading of the sensor.
•
Customer Scratch Pad: The tester is requested to
input data into the fields displayed on the screen. This
data will be stored in the ECU and also can be stored
to a file on the computer or printed out for reference.
9. W
here a safe location is available (e.g. a restricted
access area or a test track), it is possible to road test the
ABS function by making an abrupt stop from a vehicle
speed of about 20 mph (32.19 kph) to check for proper
function. The wheels should not enter a prolonged lock
condition and the ABS function should be audible. It is
the responsibility of the technician to perform this test in
a safe location.

ABS WIRING

MISCELLANEOUS MAINTENANCE

Disconnect the electrical connectors from the ABS or the
TRSP controller before welding on the trailer.

GLAD HAND MAINTENANCE

Dielectric grease should be applied to electrical
connectors to help protect against moisture intrusion.
All connector leads of the TABS‑6 ADV MC module pigtail
harness are weather-sealed at the connector interface and
are clearly labeled for proper installation.
Bendix provides over-molded versions of the TABS‑6 ADV
MC module’s wiring harness and Bendix recommends that
the complete harness be replaced if corrosion or damage
occurs.

NEVER POUR ANY LIQUIDS (alcohol, antifreeze, additives, etc.) into the glad hands.
Liquids may cause the o-rings and seals
to swell, or may result in lubrication loss
and leave harmful residues.
Prevent nesting insects and contaminants
from entering and blocking the air hoses.
Check that screens are present and clean.
Drain the trailer air tanks a minimum of every six (6)
months.
Liquids/contamination can cause TRAILER AIR BRAKE
FAILURE and/or the INABILITY TO RELEASE the trailer
parking brakes.

When troubleshooting ABS wiring, some general rules should
be followed where applicable.
1. C
heck all wiring and connectors to ensure they are secure
and free from visible damage (e.g. cuts, abrasions, etc.).
2. C
heck for evidence of wire chafing due to poor routing
or poor securing of wires.
3. Check connectors for proper insertion and locking.
4. V
erify the connector pins are properly greased with a
non-conductive electrical grease compound.
5. C
onnector terminals must not show signs of corrosion or
exposure to the environment.
6. Never pierce wire insulation when checking for continuity.
7. D
o not deform individual pins or sockets during probing
with a volt/ohm meter.
8. It is strongly recommended that all wiring harnesses and
sensor leads are properly secured at least every 18 in.
(46 cm).
9. A
pply a small amount of non-conductive electrical grease
to each connector pin before reconnecting.

23

E

E

IGNITION VOLTAGE

D

D

BRAKE LAMP VOLTAGE

C

C NOT USED

30

85

NOT USED
NOT USED

87

Load Sensor
(Optional)

86

1

1

3

3

2

2

4

4

1

1

2

2

3

3

4

4

5

5

6

6

1
2

NOT USED

ABS INDICATOR LAMP (AUX I/O 7)

REAR DUMP
CONTROL RELAY
AND ATC VALVE
(OPTIONAL)

LIFT BAG
PRESSURE
SWITCH
(OPTIONAL)

3

GROUND

4
5

TT-CAN HI

6

TT-CAN LO

NOT USED

7

NOT USED

AUX I/O 1
AUX I/O 2

1
2

AUXILIARY I/O 3

3

SENSOR GROUND

4

SENSOR INPUT

5

SENSOR SUPPLY

6

NOT USED
NOT USED
SAE J1939 (H)

4-PIN CONNECTORS

BENDIX® TRAILER
INFORMATION MODULE:
G2 (OPTIONAL)

2

7
8

7

4

4

6

6

3

3

5

5

2

2

NOT USED

4

4 NOT USED

1

1

NOT USED

3

3 NOT USED

2

2

NOT USED

1

NOT USED

1

1 NOT USED

NOT USED

2

7

7-PIN
CONNECTOR

SAE J1939 (L)
AUX I/O RETURN 1 and 2
AUX I/O RETURN 3

SENSOR “S-C” (+)

1

SENSOR “S-C”

SENSOR “S-C” (-)