Principles of Operation

PRINCIPLES OF OPERATION

Power Door Locks
The vehicle security module controls the power door locks, remote keyless entry (RKE) system, and the memory locking feature on vehicles equipped with a sliding door. The lock and unlock operation is carried out by supplying ground to the vehicle security module from the door lock control switch. The normal path of the actuators is to ground through the vehicle security module. The door lock control switch locks and unlocks all doors by grounding the appropriate circuit to the vehicle security module. The vehicle security module then supplies power to the appropriate common actuator circuit to lock or unlock all the doors.

The sliding door memory lock feature locks the sliding door in the event that a lock command was issued by the operator while the sliding door was open. Since the door lock actuators are located in the sliding door, power is supplied to the actuators through the contact plate. When the sliding door is opened, the circuit is also opened. If a lock command is issued through the RKE transmitter or door lock control switches and the sliding door is opened, the memory lock feature remembers the command and reissues the lock signal to the door lock actuators once the sliding door is closed.

Remote Keyless Entry (RKE)
The RKE transmitter sends a frequency that is received by the vehicle security module internal antenna. Depending on the frequency received, the vehicle security module locks all the doors or unlocks the driver door. If the unlock frequency is received again within 3 seconds of the first unlock, the vehicle security module unlocks all the doors.

If the frequency received is for the panic button, the vehicle security module cycles ground to the parking lamps and the horn. The parking lamps and the horn continue to cycle until the panic button is pressed again or the ignition switch is turned to the ON position. The operating range of the RKE transmitter may be affected by aftermarket systems, dealer installed options, high power devices, or TV/radio transmission towers.