Diagnostic Test

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

ACTIVE DTC
1. Ignition on, engine not running.
2. With a scan tool, read PCM DTCs.
  Is the DTC active at this time?
  
  Yes
  - Refer to U0121-LOST COMMUNICATION WITH ABS and perform the U0121-Lost Communication with Anti-lock Brake Module diagnostic procedure.
  No
  - Refer to STORED LOST COMMUNICATION DTCS and perform the Stored Lost Communication DTCs diagnostic procedure.