Diagnostic Test

WARNING: This page is about a different car, the 2012 Dodge Durango. 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. With the scan tool, read active DTCs.
  Is this DTC active?
  
  Yes
  - Perform the U0001-CAN C Bus diagnostic procedure. Refer to U0001-CAN C BUS and perform the U0001-CAN C Bus diagnostic procedure.
  No
  - Perform the Stored Lost Communication DTCs diagnostic procedure.Refer to COMMUNICATION - DIAGNOSIS AND TESTING .