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 ACTIVE DTC
1. With the scan tool, read Radio Frequency Hub (RF HUB) DTCs and record on the repair order.
2. With the scan tool, erase DTCs.
3. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
4. With the scan tool, read RF HUB DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - The condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension and repair as necessary. If no problems are found, test complete.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (D926) PASSIVE ENTRY ANTENNA 4 SIGNAL CIRCUIT FOR AN OPEN
1. Disconnect the Passive Entry Antenna 4 harness connector.
2. Measure the resistance of the (D926) Passive Entry Antenna 4 Signal circuit between the RF HUB C2 harness connector and the Passive Entry Antenna 4 harness connector.
  Is the resistance below 2.0 Ohms?
  
  Yes
  - Go To 3
  No
  - Repair the (D926) Passive Entry Antenna 4 Signal circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (D927) PASSIVE ENTRY ANTENNA 4 RETURN CIRCUIT FOR A OPEN
1. Measure the resistance of the (D927) Passive Entry Antenna 4 Return circuit between the RF HUB C2 harness connector and the Passive Entry Antenna 4 harness connector.
  Is the resistance below 2.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the (D927) Passive Entry Antenna 4 Return circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (D926) PASSIVE ENTRY ANTENNA 4 SIGNAL CIRCUIT FOR A SHORT TO THE (D927) PASSIVE ENTRY ANTENNA 4 RETURN CIRCUIT
1. Check for continuity between the (D926) Passive Entry Antenna 4 Signal circuit and the (D927) Passive Entry Antenna 4 Return circuit at the RF Hub C2 harness connector.
  Is there continuity between the (D926) Passive Entry Antenna 4 Signal circuit and the (D927) Passive Entry Antenna 4 Return circuit?
  
  Yes
  - Repair the (D926) Passive Entry Antenna 4 Signal circuit for a short to the (D927) Passive Entry Antenna 4 Return circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Passive Entry Antenna 4 in accordance with the service information. Refer to ANTENNA, PASSIVE ENTRY, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .