Circuit/System Description

The keyless entry system will unlock the vehicle doors or open/unlock the rear compartment when a corresponding button on the keyless entry transmitter is pressed. This is accomplished by the keyless entry transmitter sending a radio frequency to the remote control door lock receiver, which then sends the signal to the body control module (BCM). The BCM interprets the signal and activates the requested function. A low transmitter battery or radio frequency (RF) interference from aftermarket devices such as 2-way radios, power inverters, cellular phone chargers, computers, etc. may cause a system malfunction. High RF traffic areas, such as gas stations which use pay-at-the-pump RF transponders, may also cause interference that could lead to a malfunction.

The remote control door lock receiver uses the AM/FM antenna, located in the rear glass, to increase the range of the transmitter. A coax cable connects the remote control door lock receiver to the radio antenna amplifier. The radio antenna amplifier acts as an interface that combines the radio antenna and the remote control door lock receiver antenna. This allows both the radio and the remote control door lock receiver to use the AM/FM antenna.