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Front Acceleration Sensor: Inspection

  1. INSPECT ACCELERATION SENSOR ASSEMBLY 
    1. Connect 3 1.5 V dry batteries in series.
    2. Connect terminal 3 (SGB) to the batteries' positive (+) terminal, and terminal 2 (SGG) to the negative (-) terminal.
      Fig 1: Identifying Acceleration Sensor Assembly
      G04944235Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the voltage of the sensor.

Standard voltage 

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester Connection Sensor Condition Specified Condition
1 (SGRR) - 2 (SGND) Sensor stationary Approx. 2.25 V
Sensor is tilted Change between approx. 0.9 to 2.3 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.