Diagnostic Test

WARNING: This page is about a different car, the 2009 Dodge Durango and 2009 Chrysler Aspen. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE
NOTE: Make sure the IOD fuse is installed and battery Voltage is between 10 and 16 Volts before proceeding.
1. Turn the ignition on.
2. Using a scan tool, read DTCs.
  Is this DTC active?
  
  Yes
  - Refer to DTC-Based Diagnostics/MODULE, Front Control (FCM) - Diagnosis and Testing and perform the U0141-Lost Communication with Front Control Module (FCM) diagnostic procedure.
  No
  - Perform the Stored Lost Communication DTCs diagnostic procedure. Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing .