Bendix Commercial Vehicle Systems TABS-6 ADVANCED SINGLE CHANNEL - Manual (Page 31)

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SECTION E: TROUBLESHOOTING THE
BENDIX ® WS‑24 ™ WHEEL SPEED SENSORS (WSS)
Turn off the power to the module, disconnect
the wheel speed sensor connector.
If Dynamic WSS DTCs are present:
Rotate the affected wheel and verify a minimum
of 0.25 VAC sensor output @ 0.5 RPS across the
wheel speed sensor pins. A properly positioned
sensor can output more than 2.0 VAC @ 1 RPS
Verify/inspect the following:
• Speed sensors properly contact the tone ring.
• The condition and retention force of the sensor
sleeve.
• Proper sensor lead condition, routing and
clamping sleeve.
• Condition of tone ring mounting and teeth.
• Proper number of tone ring teeth per sensed
wheel.
• Proper adjustment of wheel bearings.
• Condition of foundation brakes.
• Check for corroded/damaged wiring or
connectors between the ECU and the WSS.
Make repairs as needed (replace wiring and/or ABS
components).
Reset active DTC’s by using any of the following
methods:
• Blink Code Diagnostics, Section 20.
• PC diagnostics, Section 23.
• Bendix Remote Trailer Diagnostic Unit (TRDU)
and magnet, Section 23.
• Bendix ® Trailer Information Module, Section 23.
(If you do not reset manually, typically these will reset
automatically after a power cycle and the vehicle has
been driven for a period of time.)
Then rerun the power up sequence. Go to Section A.
If Static WSS DTCs are present:
Using a volt/ohm meter to measure the connector
pins of the sensor with a DTC, verify 950-1950
OHMS across the sensor connector pins.
Verify/inspect the following:
• No continuity from sensor connector pins to
ground.
• Vbat not measured at either sensor connector
pins.
• Verify there is no continuity between the sensor
leads and other sensors.
• Sensor/ECU wiring and connectors are not
damaged or corroded.
• Proper sensor wire routing and clamping.
Make repairs as needed (replace wiring and/or ABS
components).
Reset active DTC’s by using any of the following
methods:
• Blink Code Diagnostics, Section 20.
• PC diagnostics, Section 23.
• Bendix Remote Trailer Diagnostic Unit (TRDU)
and magnet, Section 23.
• Bendix ® Trailer Information Module, Section 23.
Then check for Dynamic WSS DTCs, see left
column.
Then rerun the power up sequence. Go to Section A.
Note: Both Static and Dynamic WSS DTCs may be present:
Looking into TABS-6 Advanced module Wire Harnesses
S‑C Sensor
(See Figure 19 on
Page 22 for Usage.)
S‑D Sensor
(See Figure 19 on
Page 22 for Usage.)