Radio Frequency Module (RF Hub) - Operation

OPERATION

There are 5 other component categories that make up the new ignition system.
The components are:
- Radio Frequency (RF) HUB (1)
- LF Antennas (5)
- FOB (2, 4 for Police)
- Special Door Handles (2)
- Special Liftgate Handle (1)

This new ignition system operation begins when an owner approaches their vehicle with a FOB somewhere on their person or belongings, i.e., in their gym bag. When the owner touches the handle to pull the door open, door handle electronics signal the RF HUB with a "request to open". The RF HUB uses all of the 5 LF (low frequency) antennas to communicate with the FOB. Once located, the FOB's response is evaluated by the RF HUB to determine if the person pulling on the door handle is in fact the owner. This process completes 'FOB authentication'.

Once authentication is successfully completed, the RF HUB requests the Body Control Module (BCM) to unlock the affected door. Once the doors unlock, the owner is then free to continue pulling the door handle in an attempt to enter their vehicle. This process of opening the door without actively using a FOB or key is called 'passive entry'. The LD/LX trunk handle is outfitted with a passive entry switch, allowing the trunk to pop open when it's pressed after FOB authentication completes successfully.

After the vehicle's owner is buckled, the customer then pushes the KIN's SSB (Keyless Ignition Node's Start/Stop Button) while pushing the brake pedal as if braking while coming to a stoplight. (For manual transmission vehicles the clutch pedal is depressed instead of the brake pedal to initiate a start procedure). Before the vehicle is allowed to start, another 'FOB authentication' cycle must be completed. Once successfully completed, the RF HUB next sends the BCM the ignition switch position, which equates to a 'request to start' command. The process of starting a vehicle without the act of using a bladed key or FOB is called 'Keyless Go'.

The passive entry works when the FOB can be located outside the vehicle using the LF antennas. Keyless go operates when the RF HUB can locate the FOB inside the vehicle. Please refer to the owner's manual for more information on authentication zones.

After putting the vehicle into park, pushing the KIN's SSB allows the vehicle's engine to be shut off. In an emergency, pressing the SSB continuously for 2 seconds or repeatedly (one hit every 30- 500msec) shuts off the engine.