WABCO iABS 2S/1M Standard, Maintenance Manual

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Appendix II
Fig. 11.2
SENSOR
CABLE
3"
(76 MM)
4003573 a
5. Install the wheel hub carefully so that the tooth wheel pushes against the sensor as the wheel
bearings are adjusted. There should be no gap between the sensor and the tooth wheel. If the gap is
too large, this can cause the ECU to log a fault code.
6. Test the sensor output voltage. Use a volt/ohm meter to check the output voltage of the sensors while
rotating the wheel at approximately 1/2 revolution per second. Minimum output must be 0.2 volts AC,
though if the wheel is spun faster than 1/2 of a revolution per second, the reading will likely be higher.
It is important to spin the wheel at the correct speed to determine the output is in fact correct. If
minimum output is less than 0.2 volt AC, push the sensor toward the tooth wheel. Recheck the sensor
output.