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.

DETERMINING IF DIAGNOSTIC TROUBLE CODE (DTC) IS CURRENT
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. Use the alleged FOBIK and try to cycle the ignition.
4. Wait 10 seconds.
5. 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.
CHECKING FOR MULTIPLE KEYS
Are there multiple vehicle FOBIK's available?

Yes
- Go To 3
No
- Go To 4
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
  - Go To 5
  No
  - Replace the FOBIK that caused the RFH DTC.
  - Perform the RFH VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST .
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.
  Did the DTC return?
  
  Yes
  - Go To 5
  No
  - Test complete.
REPLACE FOBIK
1. Replace the FOBIK that caused the RFH DTC.
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.
  Did the DTC return?
  
  Yes
  - Go To 6
  No
  - Test complete.
REPLACE THE IGNM
1. Replace the IGNM in accordance with Service Information.
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.
  Did the DTC return?
  
  Yes
  - Replace and program the Radio Frequency Hub Module in accordance with the Service Information.
  - Perform the RFH VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST .
  No
  - Test complete.