Keyless Entry System Description and Operation: Notes
| Solid line - Hard Wire I/O Dash line - Serial Data |
|
|---|---|
| A23D | Door Latch - Driver |
| A23LR | Door Latch - Left Rear |
| A23P | Door Latch - Passenger |
| A23RR | Door Latch - Right Rear |
| K9 | Body Control Module (BCM) |
| K77 | Remote Control Door Lock Receiver |
| K84 | Keyless Entry Control Module |
| T10 | Keyless Entry Antenna |
| T10E | Keyless Entry Antenna - Rear Compartment |
| T10G | Keyless Entry Antenna - Rear Fascia |
| T10J | Keyless Entry Antenna - Center Console Front |
| T10K | Keyless Entry Antenna - Center Console Rear |
| T10M | Keyless Entry Antenna - Driver Door Handle |
| T10N | Keyless Entry Antenna - Passenger Door Handle |
| 15 | Keyless Entry Transmitter |
Keyless Entry System Description and Operation - Active
The keyless entry system is a vehicle entry device. The keyless entry system is used in conjunction with the door locks to unlock the vehicle. Keyless entry will lock/unlock the vehicle doors or open the rear compartment lid 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 antenna that has a direct link to the body control module (BCM). The BCM interprets the signal and activates the requested function or request the appropriate control module to activate the function via a serial data message. A low transmitter battery or radio frequency interference from aftermarket devices, such as 2-way radios, power inverters, computers, etc., may cause a system malfunction. High radio frequency traffic areas, such as gas stations that use pay-at-the-pump radio frequency transponders, may also cause interference that could lead to a malfunction. Keyless entry allows you to operate the following features:
- Door lock/unlock
- Remote start
- Charge port door release
- Illuminated entry lamps
- Panic alarm/Vehicle locator
- Remote vehicle start
Keyless Entry System Description and Operation - Passive
Passive keyless entry allows entry to a locked vehicle without pressing any buttons on the keyless entry transmitter. You must only have the transmitter with you. The passive entry system use low frequency antennas in several different areas on the vehicle to determine the location of the transmitter. When passively opening a locked door or the rear compartment, you must have a programmed transmitter with you in your pocket, purse, or briefcase.
When an exterior door handle button is pressed or the rear compartment touch pad is pressed, the low frequency antenna sends out a challenge to the keyless entry transmitter. Because of the low frequency, communication range is limited. The antenna will emit the challenged in a one meter range. The transmitter must be within this range to receive the challenge. The transmitter receives this challenge and emits it's response as an RF message, which is received by the remote control door lock receiver. If the response is correct, the door or rear compartment will unlock and open.
As a customer convenience feature, the keyless entry system will notify the driver if the transmitter has been left in the vehicle after exiting by chirping the vehicle horn three times. This may be turned off using vehicle personalization. Also, if the transmitter is left in the vehicle after the central door lock switch has been used to lock the vehicle, the driver door will remain unlock after exiting the vehicle. This is intended to prevent locking the transmitter in the vehicle and being unable to access it.
Keyless Entry System Description and Operation - Keyless Start
The keyless start portion of the keyless entry system allows vehicle starting, having only the transmitter as your key. The keyless start system use low frequency antennas in three different locations on the vehicle to determine the location of the transmitter. Multiple antenna are used to ensure complete coverage of the vehicle interior and rear compartment. When using the keyless start system, a programmed transmitter must be in the vehicle's interior, such as the driver's pocket, purse, or briefcase.
When the ignition mode switch is pressed, the low frequency antennas emit a challenge to the keyless entry transmitter. The transmitter receives this challenge and emits it's response as an RF message, which is received by the remote control door lock receiver. If the response is correct, vehicle starting will be allowed. If RF communication is interrupted, a "No Remote Detected" message will be displayed on the DIC. In these cases, the extended transmitter key blade can be placed in the transmitter slot located in the upper instrument panel storage compartment, under the rubber mat. The immobilizer antenna coil is located directly beneath the transmitter slot. Placing the extended key blade in the slot will create a low powered coupling between the transmitter and immobilizer antenna, allowing communications to occur and enabling vehicle starting.
The keyless entry system has the following components:
- Vehicle key with integrated keyless entry transmitter
- Driver and front passenger door antennas (part of the door handle assembly)
- Driver and front passenger door handle switches (part of the door handle assembly)
- Rear fascia antenna
- Front instrument panel console antenna
- Center console antenna
- Rear compartment antenna
- Body Control Module (BCM)
- Keyless entry control module
- Immobilizer antenna coil
- Remote control door lock receiver