Bendix Commercial Vehicle Systems TABS-6 TRAILER ABS MODULE - Manual (Page 22)

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Troubleshooting Flowcharts
Diagnostic trouble code information can be retrieved from
the TABS-6 module by using blink code diagnostics, or a
diagnostic tool. The following troubleshooting fl ow charts
will help the technician isolate the cause of the fault and
confi rm whether the fault resides in the component, wiring
or connectors.
Troubleshooting should always begin by observing the
dash or trailer-mounted ABS indicator lamp during the
TABS-6 module's power-up sequence. If it is necessary
to make electrical measurements, always begin by taking
voltage and resistance measurements at the 5- or 18-pin
ECU pigtail harness connector.
Once the circuit fault is found, isolate the area needing
repair by repeating the measurements at all connections
in the affected circuit towards the modulator, wheel speed
sensor, etc.
No voltage or resistance measurements are to be made on
the bulkhead connector pins of the module.
Troubleshooting Flowcharts
Section A : (Power-Up Sequence)
Trailer-Mounted ABS Indicator Lamp . . . . . . . Page 23
Section B: (Power-Up Sequence)
Dash-Mounted ABS Indicator Lamp . . . . . . . . Page 24
Section C: Diagnostic Trouble Code (DTC) Blink
Code Quick Reference . . . . . . . . . . . . . . . . . . . Page 25
Section D: Diagnostic Trouble Code
TRDU
™ Tool LED Quick Reference . . . . . . . . . Page 26
Section E: Troubleshooting the Trailer-Mounted
ABS Indicator Lamp Circuitry . . . . . . . . . . . . . Page 27
Section F: Troubleshooting the Power Supply . . . . . . . . . Page 28
Section G: Troubleshooting the WS-24 ™ Wheel
Speed Sensors . . . . . . . . . . . . . . . . . . . . . . . . . Page 29
Section H: Troubleshooting the BR9235 ™ Modulator
Relay Valves. . . . . . . . . . . . . . . . . . . . . . . . . . . Page 30