Diagnostic Test

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

VERIFY DTC IS ACTIVE
NOTE:
Make sure the IOD fuse is installed and the battery is fully charged before proceeding.
1. Turn the ignition on.
2. With the scan tool, read active DTCs.
  Is this DTC active?
  
  Yes
  - Refer to U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM) for 2500 & 3500 or U0141-LOST COMMUNICATION WITH IPM (FCM/TIPM) for 3500 Cab & Chassis, 4500 & 5500 . and perform the U0141-Lost Communication with IPM (FCM/TIPM) diagnostic procedure.
  No
  - Perform the STORED LOST COMMUNICATION DTCS for 2500 and 3500, or STORED LOST COMMUNICATION DTCS for 3500 Cab & Chassis, 4500 and 5500 diagnostic procedure . and perform the Stored Lost Communication DTCs diagnostic procedure.