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Required Special Tools:
- MB991709: Wiring harness set
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The relevant wheel, on which the wheel speed sensor is fitted, should
be free to run.
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1.Remove the wheel speed sensor connector to be checked.
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2.
| caution |
For precise measurement, do not connect to the wheel
speed sensor-side connector and the wiring harness side connector terminal No.1.
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Use the special tool test harness (MB991709) to connect a multimeter between the wheel
speed sensor-side connector and the wiring harness connector terminal No.2.
3.Turn the ignition switch to the "ON" position.
4.
| caution |
Do not rotate the wheel too quickly. Output current changes
significantly as the wheel speed detection magnetic encoder comes near or goes away from the
wheel speed sensor.
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Rotate the wheel, on which the wheel speed sensor is fitted, quite slowly to measure the
output current with the multimeter.
Standard value: 5.9 to 8.4 mA or 11.8 to 16.8 mA
5.If the measurement is not within the standard value, or the output current does not
change in proportion to the wheel rotation, replace the wheel speed sensor (Refer to  ).
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