Diagnostic Test

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
NOTE:
All FOBIKs used with this vehicle should be present during this test. In pursuit vehicles, the most probable cause that sets this code is the RKE transmitter being pressed over 1024 times when it is out of range of the vehicle and loses synchronization with the rolling code in the RFHM. If the DTC is active, drive vehicle above 5 MPH; and then verify the DTC has changed to stored. If the DTC is stored, the concern has been fixed. If the DTC remains active, reprogram ALL FOBIKs to the vehicle first using the diagnostic scan tool.

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. Use the alleged inoperative FOBIK, cycle/press (if equipped with Keyless Go, the KIN button) the ignition on.
  NOTE:
  On the Passive Entry Keyless Go (PEKG)/Keyless Ignition Node (KIN) system, using the rounded end of the FOBIK to press the Stop/Start button can cycle the ignition even if the battery in the FOBIK is INOP.
2. With the scan tool, read RF Hub DTCs and record on the repair order.
3. Press the lock/unlock button of the alleged inoperative FOBIK several times.
4. With the scan tool, read RF Hub DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - The conditions that caused this DTC to set are not present at this time. The FOBIK may have already been re-syncronized by being in the vehicle while it was being driven. Inform the owner of the most probable cause for this code to set and therefore causing the FOBIK to be inoperative.
CHECK THE FOBIK
1. With the scan tool, erase the DTCs.
2. Turn the ignition off.
3. Put the inoperative FOBIK in the vehicle.
4. With the good FOBIK, start and drive the vehicle above five miles per hour for one mile.
5. Turn the ignition off.
6. Operate the inoperative FOBIK in all functions several times.
7. With the scan tool, read RF Hub DTCs.
  Is the DTC active?
  
  Yes
  - Go To 3
  No
  - Test complete.
REPROGRAM OR REPLACE THE FOBIK
1. With the scan tool, reprogram ALL existing FOBIKs used with this vehicle.
2. With the scan tool, erase the DTCs.
3. Turn the ignition off.
4. Operate the previously noted inoperative FOBIK in all functions several times.
5. With the scan tool, read RF Hub DTCs.
  Is the DTC active?
  
  Yes
  - Replace the FOBIK and program using the scan tool. Refer to MODULE, RADIO FREQUENCY (RF HUB), MODULE PROGRAMMING .
  No
  - Test complete.