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 DTCs and record on the repair order.
2. Record the Environmental Data.
3. With the scan tool, erase DTCs.
4. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
5. With the scan tool, read Drivetrain Control Module (DTCM) DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK POWER TRANSFER UNIT (PTU) SHIFT ACTUATOR AND PTU FOR MECHANICAL FAILURES
1. Turn the ignition off.
2. Remove the PTU Shift Actuator in accordance with the Service Information.
3. Visually inspect the PTU and Shift Actuator for damage or mechanical problems that could cause the PTU to not shift.
  Where any problems found?
  
  Yes
  - Repair as necessary in accordance with the Service Information.
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
  No
  - Go To 3
REPLACE THE PTU SHIFT ACTUATOR AND CHECK FOR THE DTC TO RETURN
1. Replace the PTU Shift Actuator in accordance with the Service Information.
2. Turn the ignition on.
3. With the scan tool, read DTCs.
4. Test drive the vehicle in Sport Mode and use the When Monitored conditions to operate the vehicle in the conditions that set the DTC.
5. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Replace the PTU in accordance with the Service Information. Refer to REMOVAL .
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .
  No
  - The new PTU Shift Actuator repaired the problem.
  - Perform the DTCM VERIFICATION TEST. Refer to DTCM VERIFICATION TEST .