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 the Amplifier DTCs.
  Does the scan tool display this DTC as active?
  
  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. Repair as necessary. If no problems are found, test complete.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
VERIFY CLUSTER IS ACTIVE ON THE CAN BUS
1. With the scan tool, select ECU View.
2. Verify that the Cluster is active on the bus.
  Is the Cluster active on the bus?
  
  Yes
  - Go To 3.
  No
  - Refer to NO RESPONSE FROM IPC (INSTRUMENT PANEL CLUSTER) and perform the No Response from Cluster/CCN diagnostic procedure.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
DTCS STORED OR ACTIVE IN THE CLUSTER
1. Check for active DTCs in the Cluster.
  Are any DTCs active or stored in the Cluster?
  
  Yes
  - Refer to DIAGNOSTIC CODE INDEX, IPC and perform the appropriate diagnostic procedure.
  No
  - Go To 4
ACTIVE COMMUNICATION DTCS IN THE BCM
1. With the scan tool, select ECU View and select BCM.
2. With the scan tool, read active DTCs.
  Are any Communication DTCs active in the BCM?
  
  Yes
  - Refer to BODY CONTROL MODULE (BCM) - DIAGNOSTIC CODE INDEX and perform the appropriate diagnostic procedure.
  No
  - Replace the Amplifier in accordance with the Service Information. Refer to AMPLIFIER, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .