Description And Operation: Operation

WARNING: This page is about a different car, the 2022 Chrysler Voyager and 2022 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.

The FOB with Integrated Key (FOBIK) incorporates many useful functions into a single, compact unit. The transducer on the internal circuit board of the FOBIK uses low frequency Radio Frequency (RF) communication to ensure vehicle security through an electronic validation or handshake process that is performed with the Radio Frequency Hub Module (RFHM) each time the engine is started.

When any one of the Remote Keyless Entry (RKE), liftgate or remote start buttons of the FOBIK is depressed, the on-board transmitter of the FOBIK generates a high frequency RF request signal that is received and validated by the RFHM. If the RFHM determines the RF signal was generated by a FOBIK that is valid for the vehicle, the RFHM relays electronic request messages to the appropriate electronic modules in the vehicle over the Controller Area Network (CAN) data bus to invoke the functions or features associated with the request.

The integrated mechanical emergency key of the FOBIK provides emergency access to the vehicle in case the battery in the vehicle or the transmitter becomes discharged. The emergency key can also be retained to keep any locked on-board vehicle storage compartments such as the glove box secured, for example: While the vehicle is being attended to by a parking valet.

Each vehicle owner is provided with a four-digit Personal Identification Number (PIN) by the dealer at the time of vehicle purchase. This number is required along with a diagnostic scan tool for the dealer to program an additional or replacement FOBIK into the electronics of the vehicle. The emergency key included with a new additional or replacement blank FOBIK must also be cut to match the coding of the lock cylinders in the vehicle.

Diagnosis of a FOBIK transmitter requires the use of a Radio Frequency Detector such as special tool (#9001, Rf Detector). Refer to the appropriate diagnostic information.

Key Sense Overview - This product provides the vehicle owner with the ability to identify a specific vehicle key for which a customized category of vehicle settings can be applied to determine the driving experience for other drivers of the vehicle. The vehicle settings are protected by a unique 4-digit PIN, which the vehicle owner creates when accessing the specific settings for the first time. This product also has additional features that are always enabled when the specific key is in use that cannot be set by the vehicle owner. While this specific key is in use, the vehicle will respond accordingly to the customized vehicle settings and mandatory features. This includes enhanced driving assistance features, increased driver alerts, and the locking of certain optional features. The key sense is selectable only using the scan tool through the RFH and may be set to either "admin" or "keysense".

Key Sense Operation -

The Powertrain Control Module (PCM) will receive the feature configuration CAN message to change max vehicle speed when a dedicated "Key Sense" key fob is present in the vehicle.
The PCM will control torque to limit maximum vehicle speed equal to a calibratable value. The maximum vehicle speed is determined by a lookup table that uses the value received in the feature configuration CAN message.
The PCM will request via CAN to the Body Control Module (BCM) to provide visual feedback to the driver using the Instrument Cluster (IC) to inform the driver that the speed limiting function is active or close to being active