The immobilizer system protects your vehicle from theft. If an improperly coded key (or other device) is used, the engine’s fuel system is disabled.
Mechanical key If you lock the driver’s door with a mechanical key, all vehicle doors will lock. If you unlock the driver’s door with a mechanical key, you can open and close the driver’s door only.
Inspection 1. Turn the ignition switch OFF. 2. Disconnect the temperature control actuator connector. 3. Verify that the temperature control actuator operates to the cool position when connecting 12V to terminal 3 and grounding terminal 7.