Name: BENDIX TABS-6
Brand: BENDIX
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SECTION F: TROUBLESHOOTING THE

LOAD SENSOR (OUT‑OF‑RANGE CONDITION)

(Note: The indicator lamp for this condition is illuminated only after the vehicle moves.)

Turn off the power to the module.

For spring suspension system trailers:

Verify/inspect the following:

1. Inspect the load sensor linkage:

• Check that the linkage is attached to the axle

clamp.

• Inspect for damage to the linkage components,

loose connectors and mis‑installation.

• Check that the load sensor lever rod is in a

horizontal position with the trailer empty.

• Verifythatthesensorlinkagehasnotipped

over so that it faces the opposite direction.

2. Switchonpowertothemodule.UsingBendix

ACom

Diagnostics,opentheTRSPSensors

screen and press “Start.” Find the load (in lbs.)

that the sensor is registering, and verify that the

actual trailer load is consistent with the value

found. Where the value does not appear to

be correct, perform the load sensor resistance

check:

• Unplugthe12-pinconnectorfromthemodule.

• With the load sensor lever in the horizontal

position,verifythatapproximately2.5KOhmsis

measuredbetweenpinsfour(4)andve(5)and

betweenpinsve(5)andsix(6).UsingBendix

AComDiagnosticsopentheconguration

screen,thentheLoadandSensorConguration

tab,andselectthe“LoadSensing”panel.

Verify that the current “Sensing Type” is shown

as“External.”Ifnot,changetheselectionto

“External.”

Where the value does not appear to be correct,

enterthecorrectvalue(s)ontheconguration

screen. If your version of Bendix ACom

Diagnosticsdoesnotpermityoutomakethese

changes, update your copy of the program

(available as a free download from the support

pages at www.bendix.com.)

Note:Useascaletoobtaintheactualempty

trailer weight and use a pressure gauge to obtain

actual empty trailer suspension air bag pressure.

Wherepossible,obtaintheload\pressurecurve

fromthesuspensionmanufacturerforthespecic

suspension\airbagcombinationtondtheexpected

values for this vehicle.

Thenrerunthepowerupsequence.GotoSectionA.

For air suspension system trailers:

Verify/inspect the following:

1. Check that port P42 is connected by an

unkinked air hose to the primary suspension air

bags.

2. Check that the suspension height control valve

is functioning correctly.

3. Check for air leakage in the suspension system.

4. Switchonpowertothemodule.UsingBendix

ACom

Diagnostics,opentheTRSPSensors

screen and select “Start.” Find the load (in lbs.)

that the sensor is registering, and verify that the

actual trailer load is consistent with the value

found.

5. Where the value does not appear to be correct,

usingBendixAComDiagnostics,openthe

“Pressures” screen and select “Start.” Read

the pressure shown for the airbag port (P42).

If the load value, or pressure value are not as

expected,openthe“Conguration”screen;then

theLoadandSensorCongurationtab,and

selectthe“LoadSensing”panel.Verifythatthe

current “Sensing Type” is shown as “Internal.” If

not, change the selection to “Internal.”

Notethevaluesshownonthescreenforthe

current load and pressure. Verify that the values

shown on the screen for the empty and laden

weight and voltage are correct.