Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Pickup and 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR ACTIVE DTCS
1. With the scan tool, read the active WIN DTCs.
2. Cycle the ignition switch from off to on at least 3 times, leaving the ignition on for a minimum of one minute per cycle.
3. With the scan tool, read the active WIN DTCs.
  Does the scan tool display: U0001-CAN C BUS as active?
  
  Yes
  - Refer to U0001-CAN C BUS for 1500, 2500 & 3500 or U0001-CAN C BUS CIRCUIT for 3500 CAB & CHASSIS, 4500 & 5500 . and perform the U0001-CAN C Bus diagnostic procedure.
  No
  - Refer to appropriate Electrical Diagnostic Information . and perform the Stored Lost Communication DTCs diagnostic procedure.