Keyless Entry: Description and Operation
INTRODUCTIONThe Remote Keyless Entry System (RKE) allows locking/unlocking of vehicle door(s) and releasing the deck lid by remote control using a hand held radio frequency key fob transmitter.
The Body Control Module (BCM) may receive signals from up to four key fob transmitters. Each key fob transmitter has its own ID code, with the rolling code, and the code is programmed and stored into BCM memory. The ID code of the key fob transmitter never changes. However the rolling code portion changes every time a button is pressed. If the key fob transmitter is replaced or an additional transmitter is added, the codes of all units may have to be reprogrammed into the BCM memory. If a BCM is replaced, the key fob transmitter codes must be programmed in the new BCM memory. If a programmed key fob transmitter button is pressed more than 250 Times outside of the vehicle range, the rolling code will go out of synchronization. In this case the rolling code has to be synchronized again for complete operation. Refer to Synchronization of Rolling Code.
The Deck Lid Release switch is located in the center console, and is disabled whenever the Vehicle Theft Security System (VTSS) is activated.
Illuminated Entry
The illuminated entry relay located in the junction block is used to control the ground path for the interior lamps. Power for the relay is supplied on circuit M1. This is the Ignition-Off Draw (IOD) circuit and is protected by a 10 Amp fuse located in cavity 5 of the junction block.
Ground for the relay is supplied on circuit M112. This circuit connects from the relay to the Body Control Module (BCM). When the BCM provides a ground path for the relay, circuits M2 and Z1 are connected illuminating the interior lamps.
SYSTEM OPERATION
Key Fob Transmitter:
The key fob transmitter has four buttons for operation. They are LOCK, UNLOCK, DECK LID and PANIC.
Depressing the button:
UNLOCK button will unlock the driver's door and enable illuminated entry, if equipped. Pushing and releasing the button once will unlock the driver's door. Pushing and releasing the button two times, within five seconds interval, will unlock all doors.
- LOCK button, the horn will sound a short CHIRP to notify that the all door lock signal was received and set. The illuminated entry operation will be cancelled and all interior lamps will immediately turn OFF.
- DECK LID button will release the deck lid when the button is pressed twice within 2 Seconds.
- PANIC button will start the panic mode when the button is pressed for more than one second. The driver door will unlock. The horn will sound and the headlamps flash approximately once a second. The interior lamps will come ON. The PANIC mode can be canceled by pressing the unlock button, or will time out in approx 3 Minutes.
The BCM is capable of retaining Vehicle Access Code (VAC) even when power is removed.
Each Remote Keyless Entry Module must have at least one and no more than four key fob transmitters.
Illuminated Entry
The Illuminated Entry System is available on vehicles equipped with the Remote Keyless Entry system. The Illuminated Entry System turns ON the courtesy lamps when the remote keyless entry system is activated. The Remote Keyless Entry Module and the Body Controller are used to control the system. Courtesy lamps will turn on for 30 Seconds (± 1 Second) and fade to OFF over a 5 Second period.
The Illuminated Entry System also turns ON the courtesy lamps (and ignition switch lamp) when door is opened. The courtesy lamps will remain ON while the door is open, then fade to OFF 30 Seconds (± 1 Second) after the last door is closed.
The courtesy and ignition switch lamps will fade to OFF immediately when the ignition is switched to ON.
The Illuminated Entry System cannot be activated during the 30 Second (± 1 Second) period after the ignition switch is turned OFF. After a door is opened and closed during this 30 Second period, the system will function as previously described.
When the battery voltage has been interrupted to the Illuminated Entry System, the system will not function until the remote keyless entry UNLOCK is actuated.
The illuminated entry relay located in the junction block is used to control the ground path for the interior lamps. Power for the relay is supplied on circuit M1. This is the Ignition-Off Draw (IOD) circuit and is protected by a 10 Amp fuse located in cavity 5 of the junction block.
Ground for the relay is supplied on circuit M112. This circuit connects from the relay to the Body Control Module (BCM). When the BCM provides a ground path for the relay, circuits M2 and Z1 are connected illuminating the interior lamps.
The Illuminated Entry System is available on vehicles equipped with the Remote Keyless Entry system. The Illuminated Entry System turns ON the courtesy lamps when the remote keyless entry system is activated. The Remote Keyless Entry Module and the Body Controller are used to control the system. Courtesy lamps will turn on for 30 Seconds (± 1 Second) and fade to OFF over a 5 Second period.
The Illuminated Entry System also turns ON the courtesy lamps (and ignition switch lamp) when door is opened. The courtesy lamps will remain ON while the door is open, then fade to OFF 30 Seconds ( ±1 Second) after the last door is closed.
The courtesy and ignition switch lamps will fade to OFF immediately when the ignition is switched to ON.
The Illuminated Entry System cannot be activated during the 30 Second ( ±1 Second) period after the ignition switch is turned OFF. After a door is opened and closed during this 30 Second period, the system will function as previously described.
When the battery voltage has been interrupted to the Illuminated Entry System, the system will not function until the remote keyless entry UNLOCK is actuated.
Keyless Entry System
The system allows locking/unlocking of vehicle do Release Relay
The Deck Lid Relase circuit works in conjunction with the BCM to prevent unwanted operation after the Vehicle Theft Security System is set. The VTSS portion of the BCM will also disable the Universal Transmitter (garage door opener). The relay is energized from either the deck lid release switch or from the BCM from a signal from the Remote RKE fob transmitter.
Deck Lid Release Relay
The Deck Lid Relase circuit works in conjunction with the BCM to prevent unwanted operation after the Vehicle Theft Security System is set. The VTSS portion of the BCM will also disable the Universal Transmitter (garage door opener). The relay is energized from either the deck lid release switch or from the BCM from a signal from the Remote RKE fob transmitter.
Transmitter Battery
Key Fob Transmitter:
The transmitter has two 3 Volt batteries, which can be removed and replaced without special tools. The battery is available at local retail stores. Recommended battery is CR2016 Panasonic or equivalent. Battery life is about one to 2 years.
CIRCUIT OPERATION
Remote Keyless Entry
Operation of the Remote Keyless Entry (RKE) system is controlled by the Body Control Module (BCM).
When the BCM receives a signal from the RKE transmitter it supplies power and ground to the appropriate circuits dependent upon the operators request.
Operation of the door lock motors is the same with or without RKE.
Illuminated Entry
The illuminated entry relay located in the junction block is used to control the ground path for the interior lamps. Power for the relay is supplied on circuit M1. This is the Ignition-Off Draw (IOD) circuit and is protected by a 10 Amp fuse located in cavity 5 of the junction block.
Ground for the relay is supplied on circuit M112. This circuit connects from the relay to the Body Control Module (BCM). When the BCM provides a ground path for the relay, circuits M2 and Z1 are connected illuminating the interior lamps.