Montero V6-3.8L SOHC (2005)
Wheel Speed Sensor: Testing and Inspection
ABS Sensor Output Voltage Check
ABS SENSOR OUTPUT VOLTAGE CHECK
Required Special Tool:
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MB991219: Inspection Harness
NOTE: Two ECUs of the same type are situated up and down in a row at the inner part of the floor console. The upper side ECU is the
M-ASTC-ECU. The lower side ECU is the transfer ECU.
1. Lift up the vehicle and release the parking brake.
2. Disconnect the M-ASTC-ECU connector, and then use special tool MB991219 to measure the output voltage at the harness side connector.
3. Manually turn the wheel to be measured 1/2 to 1 turn/second. Measure the output voltage with a voltmeter or oscilloscope.
Output voltage:
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Minimal voltmeter reading: 42 mV
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Maximum voltmeter reading: 300 mV
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Minimal oscilloscope reading: 120 mV
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Maximum oscilloscope reading: 600 mV
Probable causes of low output voltage
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ABS sensor pole piece-to-ABS rotor clearance too large
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Faulty ABS sensor
NOTE: Check the connection of the sensor harness and connector before using the oscilloscope.
