Circuit/System Description

The keyless entry system is a vehicle entry device. Keyless entry will unlock the vehicle doors when a corresponding button on the remote-key is pressed. This is accomplished by the remote-key sending a radio frequency to the steering column module (CIM). The CIM interprets the signal and activates the requested function. A low remote-key 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.