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Component Testing: Actuator

  1. Disconnect 3-pin actuator connector. Resistance between actuator harness connector terminals No. 1 (Yellow/Green wire) and No. 3 (Black/Red wire) should be approximately 71 ohms. Resistance between actuator terminals No. 2 (Light Green wire) and No. 3 (Black/Red wire) should be 38 ohms. If resistance is as specified, go to next step. If resistance is not as specified, replace actuator.
  2. Connect positive battery lead to actuator terminals No. 1 (Yellow/Green wire) and No. 2 (Light Green wire). Connect negative battery lead to actuator terminal No. 3 (Black/Red wire). Slowly apply vacuum from 0-11.81 in. Hg to actuator vacuum port. Control cable should pull smoothly, about 1.42" (36 mm), as vacuum increases.
  3. With vacuum stabilized, control cable should not return. Disconnect positive battery lead from actuator terminals No. 1 and 2. Control cable should return to original position as vacuum returns to zero. If vacuum actuator operation is not as specified, replace actuator and recheck system operation.
NOTE: As vacuum is applied and held, drawn-in diaphragm may return. This does not indicate a malfunction as actuator leakage is allowable.
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