Module, Radio Frequency (RF Hub): Description
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, Rotary ignition system using IGNM switch, Passive Entry Keyless go system using smart door handles and KIN switch, and remote start.
Systems and features supported by the RFH include:
- Brake Transmission Shift Interlock (BTSI) System
- Ignition Switch System
- Passive Entry (PE) Keyless Go (KG) System
- 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 in the rear cargo area headliner. It is secured through two mounting tabs integral to the module housing 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).
If the vehicle is equipped with remote start or Passive Entry (PE) The external remote start antenna receives the signal from the tire pressure sensors
The RFH cannot be adjusted or repaired and, if damaged or ineffective, it must be replaced.