Module, Radio Frequency (RF Hub): Description: Description
The Radio Frequency Hub Module (RFHM) (2) (also known as the RF Hub/RFH) is a primary component of several standard and optional electronic systems in the vehicle. The RFHM 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. Different signal supporting options include automatic transmission, manual transmission, Passive Entry Keyless go system using smart door handles, the Keyless Ignition Node (KIN) switch, and remote start.
Systems and features supported by the RFHM on Chrysler, Dodge, Jeep vehicles include:
- Ignition System
- Passive Entry (PE) Keyless Go (KG) Systems
- Remote Keyless Entry (RKE) System
- Remote Start System
- Sentry Key Immobilizer System (SKIS)
- Vehicle Theft Alarm (VTA) System
Concealed and protected within the molded black plastic RFHM housing is the microcontroller and the other electronic circuitry of the module. The RFHM is located near the center of the shelf support behind the rear seat back and is concealed beneath the package tray interior trim. It is secured through two mounting tabs integral to the module housing to the shelf support by two nuts onto weld studs.
This model RFHM has two connector receptacles integral to the RFHM housing are connected to the vehicle electrical system through dedicated take outs and connectors of the body wire harness. A remote start antenna is located above the headliner and is connected directly to the RFHM through a third integral connector receptacle.
The RFHM cannot be adjusted or repaired and, if damaged or ineffective, it must be replaced.