Keyless Entry: Description and Operation

The Keyless Entry Receiver is designed with an internal antenna. The Receiver picks up transmitted Radio frequencies from a hand held Transmitter with sufficient power to operate the system from up to 7 to 10 meters (22 to 33 ft.) from the Receiver.

TRANSMITTER FUNCTIONS
Lock
When the Lock Button is pressed. the Receiver grounds the "Lock All" coil of Relay #1, causing both Door Lock Actuators to lock. The Receiver also grounds the "Illumination" coil of Relay #2 for two seconds. This provides visual confirmation that a lock function was performed.

Unlock
When the Unlock Button is pressed once, the Receiver grounds the "Unlock Driver" coil of Relay #1. causing the Left Hand Door Lock Actuator to unlock. To provide an illuminated entry. the Receiver also grounds the "Illumination" coil of Relay #2 for forty seconds or until the Receiver sees an Ignition "ON" input. When the Unlock Button is pressed twice. the second must be within five seconds of the first. the Receiver grounds the "Unlock All" coil of Relay #2, causing both actuator to receive unlock signals.

Hatch Release
When the Hatch Release Button is pressed. the Receiver grounds the "Hatch Release" coil of Relay #3. With Relay #3 closed. the Hatch Release Relay is energized and applies battery voltage to the Hatch Release Actuator. releasing the Hatch. To provide hatch area illumination. the Receiver also grounds the "Illumination" coil of Relay #2 for forty seconds or until the Receiver season Ignition "ON" input. The Hatch Release Function operates only when the vehicle is in park or neutral (Automatic Transmission) or the Parking Brake is applied (Manual Transmission). The Hatch Release Function is disabled as soon as the Keyless Entry Receiver sees an Ignition "ON" input.

Illuminated Entry Operation
The Keyless Entry Receiver provides a ground to turn on the Dome Lamp (Coupe) or Rear Courtesy Lamps (Convertible) for illuminated entry whenever a Transmitter request is received. With a "Lock" request. the Dome Lamp (Coupe) or Rear Courtesy Lamps (Convertible) is turned on for two seconds to provide visual conformation that a lock tunction was performed. - With an "Unlock" or Hatch Release" request. the Dome Lamp (Coupe) or Rear Courtesy Lamps (Convertible) is turned on for forty seconds to provide illuminated entry and batch area illumination.

The illuminated entry time cannot he extended by pressing the Lock. Unlock or Hatch Release Buttons until it has timed Out. Illuminated entry is disabled as soon as the Keyless Entry Receiver Sees an Ignition "ON" input at terminal "D" of connector C1.

Power Door Locks
The Door Lock Actuators always receive ground through the Power Door Lock Switches from G200. Battery voltage is applied to the actuators either from the PWR ACCY Fuse 7 when the Power Door Lock Switches are used (for the specific amount of time allowed before the power Door Lock Switches are disabled. refer to "Retained Accessory Power," Accessories and optional Equipment. Accessory Delay Module or from the Courtesy Fuse 8 when the Keyless Entry Receiver sees a request from the Transmitter.

PROGRAMMING THE KEYLESS ENTRY RECEIVER
The Keyless Entry Receiver is capable of accepting Vehicle Access Code (VAC) programming from any two random Transmitters. One or two Transmitters can he programmed. When two Transmitters are programmed. they must be programmed during the same program sequence. one after the other but not simultaneously. The Transmitter is manufactured with a permanent VAC combination (one of over 4 billion combinations) that cannot he changed for the life of the Transmitter. The Receiver can only be programmed by the Transmitter when it is powered at the Battery input at connector C2 terminal "F" and the program input tine is grounded to connector C1 terminal "A".

Programming Procedure
1. Ground the program input line by connecting a fused jumper at Data Link Connector (DLC) from terminal "G" to terminal "A". The Receiver will cycle the Door Lock Actuators within one to three seconds to acknowledge that the Receiver in the PROGRAM" mode.
2. Press any button on the Transmitter once. In response. the Receiver will cycle the Door Lock Actuators 10 acknowledge that a transmission has been received.
3. Press any button of the second Transmitter once. in response. the Receiver will cycle the Door Lock Actuators to acknowledge that a transmission has been received.
4. Remove the fused jumper from the DLC and verify system operation using all three transmitter buttons.

Important:
Always program both Transmitters when replacing a lost or damaged Transmitter. The first Transmitter Code programmed will always be in both memories until a second Transmitter is programmed within the same sequence.
^ The Keyless Entry System will not be operational if the program input line is left grounded.
^ Program only one vehicle Keyless Entry System at a time. If multiple vehicles are being programmed in close proximity simultaneously, it is possible that the same Transmitter could be trained to more than one Receiver.