Central Door Unlock

The central door unlock feature is activated when the driver door key is inserted into the driver door lock cylinder and turned to the Unlock position. The doors will unlock when either of the following happens:
^ The Driver Door Module (DDM) sees that its door cylinder switch is continuously closed for longer than 3 seconds.
^ The DDM sees that its door cylinder switch is closed twice in 3 seconds.

The DDM sends a Class 2 message to the RIM indicating the above. The RIM sends a Class 2 message to all of the door modules to unlock all doors.

The door key cylinder unlock switch is mounted to the driver door key cylinder. The DDM supplies battery positive voltage through the driver door key switch signal circuit, and ground via a ground circuit to the normally open contacts of the switch. When the switch is closed, voltage flows through the switch, providing the DDM with the necessary signal input.