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# DIFFERENTIAL VACUUM ACTUATOR > INSPECTION

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1. INSPECT DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY

1. Measure the resistance between terminals 1 and 2.

   Standard resistance:
     0.1 to 100 Ω

1. Measure the resistance between terminal 1 or 2 and body ground.

   Standard:
     5 MΩ or more
   1. If the result is not as specified, replace the differential vacuum actuator.

1. Check the actuator using one of the following methods.

   1. Measure the resistance of the actuator.

      Standard resistance:

        Tester Connection | Measurement Condition | Specified Condition
        3 to 4 | Battery positive (+) → Terminal 1 Battery negative (-) → Terminal 2 | Below 1 Ω
        3 to 4 | Battery positive (+) → Terminal 2 Battery negative (-) → Terminal 1 | 10 kΩ or more
        4 to 5 | Battery positive (+) → Terminal 1 Battery negative (-) → Terminal 2 | Below 1 Ω
        4 to 5 | Battery positive (+) → Terminal 2 Battery negative (-) → Terminal 1 | 10 kΩ or more
        4 to 6 | Battery positive (+) → Terminal 1 Battery negative (-) → Terminal 2 | Below 1 Ω
        4 to 6 | Battery positive (+) → Terminal 2 Battery negative (-) → Terminal 1 | 10 kΩ or more

      1. If the result is not as specified, replace the actuator.

   2. Check the actuator status.

      Actuator operation:

        Measurement Condition | Specified Condition
        Battery positive (+) → Terminal 1 Battery negative (-) → Terminal 2 | 2WD → 4WD
        Battery positive (+) → Terminal 2 Battery negative (-) → Terminal 1 | 4WD → 2WD

      1. If the result is not as specified, replace the actuator.