Radio Frequency Hub Module (RFHM) Programming
If other electronic modules need to be replaced, besides the RFHM, see the "Replacement and Programming Order Guide" before proceeding. Refer to STANDARD PROCEDURE .
If, during programming, the scan tool instructs to "Enter the vehicle PIN number", care should be taken because the RFHM will only allow 3 consecutive attempts to enter the correct PIN. If 3 consecutive incorrect PIN's are entered, the RFHM will Lock Out the scan tool. To exit Lock Mode, the ignition must remain in the Off position for 25 minutes. All accessories must be off. A battery charger connected to the battery during this time period is recommended.
The Powertrain Control Module (PCM) stores the secret key information. When the RFHM needs to be replaced, the secret key information will be retrieved from the PCM and then transferred to the new RFHM for security use.
Perform the following after completion of a diagnostic repair:
- Connect the previously disconnected components and connectors.
- It may be necessary to obtain the vehicle's unique Personal Identification Number (PIN) assigned to the vehicle. This number can be obtained from the original vehicle invoice or from your Service Manager or Parts Manager.
- Turn the ignition ON.
- With the scan tool select: RFH/Radio Frequency Hub.
- Turn the ignition off.
- If the RFHM was replaced or any un-programmed or new Frequency Operated Button Integrated Key (FOBIK)s, program all FOBIKs that are to be used with this vehicle. With the scan tool, select "Misc. Functions", "Program Ignition FOBIKs" and follow the instructions on the screen. All FOBIKs that are to be used in this vehicle must remain on the front seat near the console during programming.
- If the RFHM module was replaced, with the scan tool select "Misc. Functions", "RF-HUB Replace" and follow the instructions on the screen.
- Turn the ignition on then off leaving the key in the ON position.
- With the scan tool, erase all RFHM DTCs.
- Operate all equipped RFHM (Passive Entry, Remote Start, Ignition Positions etc.).
- Wait four minutes.
- With the scan tool, read the RFHM DTCs.
- If any RFHM DTCs are present, and perform the appropriate diagnostic procedure. Refer to DIAGNOSIS AND TESTING .
- If no DTCs are present, the repair is complete.