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
1. With the scan tool, read Instrument Cluster (IPC) DTCs and record on the repair order.
2. With the scan tool, erase IPC DTCs.
3. Turn the ignition off.
4. Turn the ignition on.
5. With the scan tool, read IPC DTCs.
  Does the DTC return?
  
  Yes
  - Go To 2
  No
  - Go To 5
CHECK FOR BODY CONTROL MODULE (BCM) DTCS
1. With the scan tool, read BCM DTCs and record on the repair order.
  Are there any BCM CAN Bus DTCs present?
  
  Yes
  - Repair the BCM DTC(s). Refer to BODY CONTROL MODULE (BCM) - DIAGNOSTIC CODE INDEX .
  No
  - Go To 3
CHECK FOR TRANSMISSION CONTROL MODULE (TCM) DTCS
1. With the scan tool, read TCM DTCs.
  Are there any TCM DTCs present?
  
  Yes
  - Repair the TCM DTC(s). Refer to TRANSMISSION CONTROL MODULE (TCM) - DIAGNOSTIC CODE INDEX .
  No
  - Go To 4
CHECK OTHER MODULES FOR DTCS
1. With the scan tool, read DTCs.
  Are there any other modules reporting implausible communication DTCs against the TCM?
  
  Yes
  - Replace and program the Transmission Control Module (TCM) in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Using the schematics as a guide, check the IPC Module pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Instrument Cluster in accordance with the Service Information. Refer to REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE WIRING AND CONNECTORS
1. The conditions necessary to set the DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this Module. Wiggle the wiring and connectors while checking for shorted and open circuits.
3. Check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
4. Check Service Bulletins for any possible causes that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Test complete.