Description And Operation: Description
The Radio Frequency Hub (RFH) overview:
- The RFH is an integrated receiver (base station) in the vehicle that interfaces with the Remote Keyless Entry (RKE) FOB using both RF (Radio Frequency) and LF (Low Frequency).
- The RFH contains the controlling logic for the Passive Entry Keyless Go (PEKG) feature, and the Keyless Ignition Node (KIN) lighting.
- The RFH communicates on the CAN C bus as well a dedicated K-line with the KIN.
- The RFH is also hard wired to the vehicle's door handles and multiple LF antennas for purposes of providing PEKG functionality.
The RFH contains the following features:
- Immobilizer
- Remote Keyless Entry
- Keyless Go
- Passive Entry
- Keyless Ignition Node (KIN) dimming control
- Remote Start
- Tire Pressure Monitoring (TPM)
The RFH marries itself to the Body Control Module (BCM) and Powertrain Control Module (PCM) with an Immobilizer Access Code (AES) at the first key on at the assembly plant.
| 1 - RFH |
The RFH is located above the headliner secured to the rear roof structure.
- Secured in place with two screws
- Can have either two or three connections:
- Pink coaxial connector (remote start only)
- 16 way connector
- 20 way connector
The RFH will, at a minimum, receive the following information from the KIN:
- Start/Stop Button states
- Transponder authentication in back up mode
The RFH will, at a minimum, transmit the following information to the KIN:
- Start/Stop Button backlight LED control
- Ignition Status Ring LED control
This model RFH has two connector receptacles integral to the RFH housing and 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 RFH through a third integral connector receptacle, which extends the range for the remote start operation. When equipped with remote start, the antenna also receives the signal from the Tire Pressure Monitor (TPM) sensors.
The RFH cannot be adjusted or repaired and, if damaged or ineffective, it must be replaced.