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 ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. With the scan tool, record and erase the DTCs.
2. Cycle the ignition off and wait one minute.
3. Cycle the ignition on.
4. With the scan tool, select: RF Hub.
5. With the scan tool, read the Active DTCs.
  Does the scan tool display: U1433-00-IMPLAUSIBLE IGNITION SWITCH STATUS MESSAGE RECEIVED as active?
  
  Yes
  - Go To 2
  No
  - Test complete, 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.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE IGNITION SWITCH STATUS
1. Cycle the ignition on.
2. With the scan tool select; RF Hub, Data.
3. Move the ignition in all positions.
4. Read and record the Ignition Switch Status, Bussed Input.
5. With the scan tool select; BCM, Data.
6. Move the ignition in all positions.
7. Read and record the Ignition Switch Status, Bussed Input.
8. Compare the messages from both modules with the actual Ignition Switch position.
  Which module is displaying the wrong Ignition Switch status?
  
  Body Control Module
  - Replace the Body Control Module in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  Radio Frequency Hub
  - Replace the RF Hub module in accordance with the Service Information. Refer to MODULE, RADIO FREQUENCY (RF HUB), REMOVAL .
  - Perform the RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST .