Actuator Test
- Disconnect 3-pin actuator connector. Resistance between actuator harness connector terminal No. 1 (Yellow/Green wire) and terminal No. 3 (Black/Red wire) should be approximately 71 ohms. Resistance between actuator terminal No. 2 (Light Green wire) and terminal 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.
- Connect positive battery lead to actuator terminal No. 1 (Yellow/Green wire) and terminal 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.
- 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.