c4c5specialist
Technical Advisor
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C6 Keyless entry system
The keyless entry system and starting system are the same integrated system. This system uses many parts to ensure reliability and function, with minimal effort from the driver/owner.
Parts of keyless system
RCDLR, or Remote Control Door Lock Receiver, which recognizes key fob reception via the antennas and communicates function to the BCM.
Antennas, 4 total, one in each door, one in the rear decklid, and one low frequency antenna pocket pod in case of transmitter battery failure.
BCM, or Body Control Module. The brains of the system, which works the starter and fuel enable signals to the PCM when correct key fob information is received from the RCDLR.
LED lamps on the door panels to indicate system readiness and function.
Key fobs/transmitters. There are 2 that come with the vehicle, although you can program up to 4. There is a sacrifice here. Only 2 will be programmed to the memory package of the vehicle, the other 2 will only function doors and engine start.
DCM, or door control modules, there is one for each door. These control modules act on commands from the BCM to unlock and open doors.
Entry to vehicle functions
There are 2 ways that the system works. You can have the system work passively, letting the electronics do the work to enter the car, or you can use the transmitters actively.
In the passive mode, the system will stay idle, and the LED lamps will flash once per second, indicating that the system is working and the vehicle is locked. When you approach the car, and the fob in your pocket or hand, the vehicle will NOT just unlock the doors. You will press a soft pad to open the door or the trunk. This wakes up the BCM, which asks the RCDLR to see if there is a valid fob close to the vehicle. The RCDLR sends a low frequency signal from the antennas to challenge a fob. The fob will then transmit back, and the RCDLR see a valid signal. The RCDLR sends an approval signal to the BCM. The LED will go to a solid light, then the BCM will allow the door to unlock and release through the door control modules.
In Passive mode, the transmitters must be within 1 meter of either door or trunk for the passive system to function correctly.
Active mode is different, as you do not have to be within 1 meter for the system to work.
The range is about 30 ft, based on obsticles in between the fob and the car. There are 3 buttons, lock, unlock and trunk. Function is the same as the older systems used. When you press the unlock button, the antitheft system disarms, but will NOT open the doors until you press the soft pad on the door you are attempting to open. Lock will turn on the theft security system. Trunk will open the trunk so you can access possessions.
Starting system
Once you have entered the car and sat down, you can simply start the car by pressing the start button. There are 3 different safety features to enable the starter. You must have the Emergency brake on, and both the clutch pedal and the brake pedal must be depressed to start the car. On automatic equipped cars, the vehicle must be in park, ebrake set, and the brake pedal must be depressed.
There is also an accessory button if you would simply like the radio on, or would like to roll down a window.
When the starter button is depressed, the BCM looks for an approval from the RCDLR for the fob. If for some reason, the fob cannot be read, "No Fob Detected" will be seen in the DIC. The car will not start.
This is where the low frequency antenna fob pod comes in. If you slide the fob into the pod, which is located in the glove box, you will be able to start the car. The low frequency pod will transmit a signal into the fob, and the system will recognize it. Then the vehicle will start.
The BCM will turn on the starter relay, to engage the starter. The BCM will also send a fuel enable signal to the PCM to turn on the injectors. This will enable the engine to run.
Backup key and function
If for some reason, battery power is lost, the key is the only way into the vehicle. There is a lock cylinder at the rear of the vehicle for you to enter the trunk area. From there, you can release the drivers side door from a manual release lever inside. Turning the key shows the system that a valid user is attempting to enter the vehicle and will not set of the alarm. Once inside, you can install the fob into the backup pod and start the vehicle.
System notes
This system is dependant on the fact that there is not alot of RF, or radio frequency interferance. If there is, the system may not work as designed. This is why installation of aftermarket accessories is very critical as to the location and design.
Radar detection equipment and hands free cellular phone kits must be installed correctly so that this does NOT present a problem to the keyless system. You can install these accessories, however, correctly so.
Allthebest, c4c5
C6 Keyless entry system
The keyless entry system and starting system are the same integrated system. This system uses many parts to ensure reliability and function, with minimal effort from the driver/owner.
Parts of keyless system
RCDLR, or Remote Control Door Lock Receiver, which recognizes key fob reception via the antennas and communicates function to the BCM.
Antennas, 4 total, one in each door, one in the rear decklid, and one low frequency antenna pocket pod in case of transmitter battery failure.
BCM, or Body Control Module. The brains of the system, which works the starter and fuel enable signals to the PCM when correct key fob information is received from the RCDLR.
LED lamps on the door panels to indicate system readiness and function.
Key fobs/transmitters. There are 2 that come with the vehicle, although you can program up to 4. There is a sacrifice here. Only 2 will be programmed to the memory package of the vehicle, the other 2 will only function doors and engine start.
DCM, or door control modules, there is one for each door. These control modules act on commands from the BCM to unlock and open doors.
Entry to vehicle functions
There are 2 ways that the system works. You can have the system work passively, letting the electronics do the work to enter the car, or you can use the transmitters actively.
In the passive mode, the system will stay idle, and the LED lamps will flash once per second, indicating that the system is working and the vehicle is locked. When you approach the car, and the fob in your pocket or hand, the vehicle will NOT just unlock the doors. You will press a soft pad to open the door or the trunk. This wakes up the BCM, which asks the RCDLR to see if there is a valid fob close to the vehicle. The RCDLR sends a low frequency signal from the antennas to challenge a fob. The fob will then transmit back, and the RCDLR see a valid signal. The RCDLR sends an approval signal to the BCM. The LED will go to a solid light, then the BCM will allow the door to unlock and release through the door control modules.
In Passive mode, the transmitters must be within 1 meter of either door or trunk for the passive system to function correctly.
Active mode is different, as you do not have to be within 1 meter for the system to work.
The range is about 30 ft, based on obsticles in between the fob and the car. There are 3 buttons, lock, unlock and trunk. Function is the same as the older systems used. When you press the unlock button, the antitheft system disarms, but will NOT open the doors until you press the soft pad on the door you are attempting to open. Lock will turn on the theft security system. Trunk will open the trunk so you can access possessions.
Starting system
Once you have entered the car and sat down, you can simply start the car by pressing the start button. There are 3 different safety features to enable the starter. You must have the Emergency brake on, and both the clutch pedal and the brake pedal must be depressed to start the car. On automatic equipped cars, the vehicle must be in park, ebrake set, and the brake pedal must be depressed.
There is also an accessory button if you would simply like the radio on, or would like to roll down a window.
When the starter button is depressed, the BCM looks for an approval from the RCDLR for the fob. If for some reason, the fob cannot be read, "No Fob Detected" will be seen in the DIC. The car will not start.
This is where the low frequency antenna fob pod comes in. If you slide the fob into the pod, which is located in the glove box, you will be able to start the car. The low frequency pod will transmit a signal into the fob, and the system will recognize it. Then the vehicle will start.
The BCM will turn on the starter relay, to engage the starter. The BCM will also send a fuel enable signal to the PCM to turn on the injectors. This will enable the engine to run.
Backup key and function
If for some reason, battery power is lost, the key is the only way into the vehicle. There is a lock cylinder at the rear of the vehicle for you to enter the trunk area. From there, you can release the drivers side door from a manual release lever inside. Turning the key shows the system that a valid user is attempting to enter the vehicle and will not set of the alarm. Once inside, you can install the fob into the backup pod and start the vehicle.
System notes
This system is dependant on the fact that there is not alot of RF, or radio frequency interferance. If there is, the system may not work as designed. This is why installation of aftermarket accessories is very critical as to the location and design.
Radar detection equipment and hands free cellular phone kits must be installed correctly so that this does NOT present a problem to the keyless system. You can install these accessories, however, correctly so.
Allthebest, c4c5