For 1990-2009 cars

### Keyless Entry System Description

The keyless entry system is a vehicle entry device. The keyless entry system is used in conjunction with the body control module (BCM) to remotely activate certain vehicle features. Keyless entry will lock/unlock the doors when a corresponding button on the keyless entry transmitter is pressed. This is accomplished by the transmitter sending a radio frequency to the remote control door lock receiver (RCDLR). The RCDLR interprets the signal and activates the requested function via a serial data message to the body control module (BCM). A low transmitter or vehicle battery or radio frequency (RF) interference from aftermarket devices, such as 2-way radios, power inverters, computers, etc., may cause a system malfunction. High RF traffic areas may also cause interference that could lead to a malfunction. Keyless entry allows you to operate the following components:

• | Door locks

• | Rear compartment lid release

• | Vehicle locator/panic alarm

• | Illuminated entry lamps

The keyless entry system has the following components:

• | Keyless entry transmitters

• | RCDLR

• | BCM

### Keyless Entry Transmitters

The keyless entry transmitters are used to lock and unlock the vehicle door while away from the immediate are of the vehicle. The transmitters will operate at a distance of up to 60 feet (18 m) away from the vehicle.

### Remote Control Door Lock Receiver (RCDLR)

The remote control door lock receiver (RCDLR) is a multifunction module that operates both the keyless entry system as well as the TPM system. When an RF message is received from a keyless entry transmitter, the RCDLR interprets this signal and will request via serial data that the body control module (BCM) perform the specific function, i.e. door lock, door unlock, or vehicle locate.

### Unlock Driver Door Only

Momentarily press the transmitter UNLOCK button in order to perform the following functions:

• | Unlock only the driver door.

• | Illuminate the interior lamps for a determined length of time, or until the ignition is turned ON

• | Flash the exterior lights, if enabled through personalization

• | Disarm the Content Theft Deterrent (CTD) System, if equipped

• | Deactivate the CTD system when in the alarm mode

### Unlock All Doors - Second Operation

Momentarily press the transmitter UNLOCK button a second time, within 5 seconds of the first press, to perform the following function:

Unlock the remaining doors

### Lock All Doors

Press the transmitter LOCK button to perform the following functions:

• | Lock all vehicle doors

• | Immediately turn OFF the interior lamps

• | Flash the exterior lights, if enabled through personalization

• | Chirp the horn, if enabled through personalization

• | Arm the Content Theft Deterrent (CTD) System, if equipped

### Rear Compartment Lid Release

Press the transmitter rear compartment lid release button to perform the following function:

Open the rear compartment lid

### Vehicle Locator/Panic Alarm

A single press of the panic button performs the following functions. Some functions may be dependent on personalization settings:

• | Pulses the horn three times

• | Flashes the parking lamps three times

A press and hold of the panic button performs the following functions:

• | Illuminates the interior lamps

• | Pulses the horn and flashes the parking lamps for 30 second or until the following conditions occur:

- | The panic button is pressed

- | The ignition switch is turned to the RUN position with a valid key