Actuator Assembly
NOTE:
If replacing actuator solenoid valves, ensure new "O" rings are installed.
- Turn ignition off. Disconnect actuator cable from actuator. See Figure . Disconnect 4-pin connector from actuator. Using fused jumper wires, connect battery voltage to terminal No. 4 of actuator connector and simultaneously connect ground to terminals No. 1, 2 and 3. See Fig 1 .
- Disconnect actuator vacuum line at vacuum check valve. Connect a vacuum pump to actuator vacuum line. 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.
- Check for leaking vacuum line. Repair as necessary. If vacuum line is not leaking, check actuator solenoid valves. See ACTUATOR SOLENOID . If actuator solenoid valves test okay, actuator assembly may have a mechanical malfunction. Road test cruise control system. If still malfunctioning, replace actuator assembly for mechanical malfunction.
- 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 assembly.
- 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 malfunctioning solenoid valve assembly. If actuator rod returns to rest position, repeat steps 1 - 5 after disconnecting ground from actuator connector terminal No. 1. See Fig 1 .
- If actuator rod returns to rest position after disconnecting ground from actuator terminal No. 1, actuator assembly is functioning properly. If actuator rod does not return to rest position and vent hose and filter are not plugged, replace solenoid valve assembly.