Diagnostic Test

WARNING: This page is about a different car, the 2020 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN INTERMITTENT CONDITION
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.

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 five minutes, reconnect and attempt to start the vehicle.

NOTE:
Verify the FOBIK in use is the FOBIK causing this DTC to set.
1. Turn the ignition on.
2. With the scan tool, record and erase the RFH DTCs.
3. Turn the ignition switch from on to off, wait five seconds and then crank the engine.
4. Cycle the engine off, key on.
5. With the scan tool, read the active RFH DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the RFH VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST .
TEST LF COMMUNICATION
1. With the scan tool, in the RFH menu, go to Data Display, Bussed Outputs and check the status for the current FOBIK that is being used and record that status.
2. Turn the ignition off.
3. Use the other known good FOBIKs programmed with this vehicle,
  NOTE:
  If another FOBIK is not available, insert a new FOBIK (Do not program) to test the RF Hub Modules LF communication.
4. Check the status of the current FOBIK being used and verify that the status changed from the first FOBIK
  Does the status change?
  
  Yes
  - Replace and program the FOBIK in accordance with the Service Information.
  - Perform the RFH VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST .
  No
  - Replace the IGNM/KIN in accordance with Service Information.
  - Perform the RFH VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST .