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Actuator Assembly

NOTE: If replacing actuator solenoid valves, ensure NEW "O" rings are installed.
  1. Turn ignition off. Disconnect actuator cable from actuator. Unplug 4-pin connector from actuator. Using jumper wires, connect battery voltage to terminal No. 4 of actuator connector and ground terminals No. 1, 2 and 3. See Figure .
  2. Disconnect actuator vacuum line at actuator vacuum check valve. Connect a vacuum pump to actuator vacuum check valve. Apply vacuum to system. Actuator rod should pull in completely. If actuator rod pulls in completely, go to step 4). If actuator rod pulls in partially or not at all, go to next step.
  3. Check for leaking vacuum line or defective solenoid. Repair or replace as necessary. See ACTUATOR SOLENOID  . If actuator solenoid tests okay, apply vacuum to system. If actuator rod does not retract completely, replace actuator assembly for mechanical malfunction.
  4. With jumper wires still connected, and vacuum holding steady, try to pull actuator rod out by hand. If actuator rod cannot be pulled out by hand, go to next step. If actuator rod can be pulled out by hand, replace actuator solenoid valve assembly.
  5. Disconnect ground wire from actuator connector terminal No. 3. Actuator rod should return to rest position. If actuator rod does not return to rest position, check vent hose and filter for restriction, and repair as necessary. If vent hose and filter are okay, replace actuator solenoid valves. If actuator rod returns to rest position, go to next step.
  6. Repeat steps 1) through 5), but this time disconnect ground from actuator connector terminal No. 1 (instead of terminal No. 3). See Figure . If actuator rod returns to rest position, go to next step. If actuator rod does not return to rest position, check for plugged vent hose or filter. If vent hose and filter are okay, replace actuator solenoid valve assembly.
  7. Remove jumper wires from 4-pin connector. Disconnect vent hose from actuator. Connect vacuum pump to actuator vent hose port, and apply vacuum. If actuator rod pulls in completely, actuator is okay. If actuator rod does not pull in completely, replace actuator.
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