Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Radio Frequency Hub
| Refer to COMPONENT INDEX . |
In vehicles equipped with the optional PEKG system, a Sentry Key antenna is not used and the RFH transmits the valid or invalid key message on the CAN-C data bus when the ignition transitions from OFF to RUN.
When the status of the ignition switch (KIN) is ON, the SKIS control circuitry transmits an RF signal to the transponder in the FOBIK by way of the LF antennas. The SKIS then waits for an RF signal response from the transponder. If the response received identifies the FOBIK as valid, the SKIS control circuitry sends a valid key message to the PCM over the CAN-C data bus. If the response received identifies the key as invalid, or if no response is received from the key transponder, the SKIS sends an electronic invalid key message to the PCM which prevents the engine from starting.
Inputs:
- Key transponder traffic from KIN
- TRM_Code request from BCM
- Ignition and operational mode status
- Odometer total request
- FOBIK validation request
Outputs:
- TRM_Code response to BCM
- Key transponder ID info
- Key programming status (FOBIK low battery message)
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.