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Rear Acceleration Sensor: Inspection: Inspection

WARNING: This page is about a different car, the 2010 Lexus GS 450h. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT REAR ACCELERATION SENSOR 
    1. Connect 3 1.5 V dry batteries in series.
    2. Connect terminal 3 (SGV) to the front battery's positive (+) terminal, and terminal 2 (SGND) to the rear battery's negative (-) terminal.
      Fig 1: Inspecting Rear Acceleration Sensor
      GTY134226Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the voltage of the sensor.

      Standard voltage

      Tester Connection Sensor Condition Specified Condition
      SGRR (1) - SGND (2) Sensor stationary Approx. 2.3 V
      SGRR (1) - SGND (2) Sensor vibrating vertically Change between approx. 1.0 to 4.0 V
      NOTE:
      • Do not apply a voltage of more than 6 V.
      • Do not drop the acceleration sensor. If it is dropped, replace it with a new one.
      • The acceleration sensor removed from the vehicle must not be placed upside down.

      HINT: 

      When the acceleration sensor is tilted, it may output a different value.

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