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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 421 (Radio Frequency (RF Hub) Module - Electrical Diagnostics - 2500 Hd & 3500 Hd) >> Diagnosis And Testing >> B1A25-00 Invalid Key >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. DETERMINING IF DIAGNOSTIC TROUBLE CODE (DTC) IS CURRENT 
    NOTE:

    An external Radio-Frequency Identification (RFID) key (and/or pass/radio key), such as one used to gain access to a 24 hour gym, can cause this DTC to set and create a no start condition. Inspect the customer's key chain for any type of RFID key. If one is not found, question the customer to see if a spare key chain has this RFID key on it or if it was removed from the original key chain before the vehicle was released for service. If a RFID key is present, remove the ignition key from the vehicle and remove the RFID key from the key chain. For GPEC equipped vehicles, disconnect the battery and wait a minimum of 5 minutes, reconnect and attempt to start the vehicle.

    NOTE:

    Verify the FOBIK being used is correct for this vehicle and unprogrammed. If the FOBIK being programmed is not blank (already programmed to another vehicle) this fault will set.

    NOTE:

    Verify that the battery is fully charged with a DVOM and use the scan tool to compare the Battery Voltage listed under "Data" in the RFH View to that of the BCM. If the battery is not fully charged, correct this condition before proceeding.

    1. With the scan tool, read and record the RFH DTCs.
    2. With the scan tool, erase the RFH DTCs.
      NOTE:

      Perform the following test several times to make sure the DTC is current.

    3. Turn the ignition off.
    4. Wait 10 seconds.
    5. Turn the ignition on.
    6. With the scan tool, read the RFH DTCs.

      Does the scan tool display the DTC that was previously erased?

      Yes 

      • Go To  2

      No 

      • Test complete.
  2. CHECKING FOR MULTIPLE KEYS 

    Are there multiple vehicle FOBIK's available?

    Yes 

    • Go To  3

    No 

    • Go To  4
  3. MULTIPLE KEY OPERATION 
    NOTE:

    Perform the following steps using one of the vehicles FOBIK's. When finished, repeat the procedure using each of the other FOBIK's, one at a time.

    1. With the scan tool, erase the RFH DTCs.
    2. Turn the ignition off.
    3. Wait 10 seconds.
    4. Turn the ignition on.
    5. With the scan tool, read the RFH DTCs.

      Is the DTC present for all ignition keys?

      Yes 

      • Replace and program the Radio Frequency Hub Module in accordance with the Service Information.
      • Perform the RFH VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Replace the FOBIK that caused the RFH DTC.
      • Perform the RFH VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  4. REPROGRAM KEY 
    1. With the scan tool, attempt to reprogram the FOBIK to the RFH.
    2. With the scan tool, erase the RFH DTCs.
    3. Wait 10 seconds.
    4. Turn the ignition on.
    5. With the scan tool, read the RFH DTCs.

      Does the DTC set again?

      Yes 

      • Replace the FOBIK that caused the RFH DTC.
      • Perform the RFH VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Test complete.
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