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 DIAGNOSTIC TROUBLE CODE (DTC)
1. Turn the ignition on.
2. With the scan tool, read active DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2
  No
  - The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
VERIFY THE PCM IS ACTIVE ON THE CAN BUS
1. With the scan tool, verify that the PCM is active on the bus.
  NOTE:
  If any DTCs are stored in the PCM, repair those first before proceeding.
  
  Is the PCM active on the bus?
  
  Yes
  - Replace and program the BCM in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Refer to NO RESPONSE FROM PCM (POWERTRAIN CONTROL MODULE) - 2.4L or NO RESPONSE FROM PCM (POWERTRAIN CONTROL MODULE) - 3.2L and perform the No Response from PCM diagnostic procedure.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .