Module, Radio Frequency (RF Hub): Description

Courtesy of CHRYSLER GROUP, LLC

The Radio Frequency Hub (RFH) (2) is a primary component of several standard and optional electronic systems in the vehicle. The RFH is a Radio Frequency (RF) and Low Frequency (LF) receiver, contains controlling logic for a number of systems and communicates with other electronic modules and nodes in the vehicle over the Controller Area Network (CAN) data bus as well as over a private serial bus. There are several models of the RFH that support NAFTA, BUX and Japan markets. Different signal supporting options include automatic transmission, manual transmission, Passive Entry Keyless Go (PEKG) system using smart door handles and Keyless Ignition Node (KIN) switch, and remote start.

Systems and features supported by the RFH include:

• Brake Transmission Shift Interlock (BTSI) System 
• Ignition System 
• Passive Entry (PE) Keyless Go (KG) Systems 
• Remote Keyless Entry (RKE) System 
• Remote Start System 
• Sentry Key Immobilizer System (SKIS) 
• Tire Pressure Monitor (TPM) System 
• Vehicle Theft Alarm (VTA) System 

Concealed and protected within the molded black plastic RFH housing is the microcontroller and the other electronic circuitry of the module. The RFH is located behind the left rear cargo quarter trim panel. It is secured through two mounting tabs integral to the module housing to the shelf support by two plastic push-in fasteners.

Depending upon vehicle equipment, either one or two connector receptacles (1 and 3) integral to the RFH housing are connected to the vehicle electrical system through dedicated take outs and connectors of the body wire harness. In vehicles with the optional remote start system, a remote start antenna is located adjacent to the RFH on the shelf support and is connected directly to the RFH through a third integral connector receptacle (2).

The RFH cannot be adjusted or repaired and, if damaged or ineffective, it must be replaced.