Diagnostic Test

WARNING: This page is about a different car, the 2019 RAM 3500 HD and 2019 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR BODY CONTROL MODULE (BCM) CONTROLLER AREA NETWORK (CAN) BUS DTCS
1. With the scan tool, read BCM DTCs.
  Are any BCM CAN bus DTCs set?
  
  Yes
  - Repair BCM CAN bus DTCs in accordance with the Service Information. If DTC U0002-00 is set, perform that diagnostic first. Refer to DTC TROUBLESHOOTING .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Go To 2
CHECK FOR POWERTRAIN CONTROL MODULE (PCM) DTCS
1. With the scan tool, read PCM DTCs.
  Are any PCM DTCs set?
  
  Yes
  - Repair PCM DTCs. Refer to DIAGNOSTIC CODE INDEX .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Go To 3
CHECK FOR OTHER TRANSMISSION CONTROL MODULE (TCM) DTCS
1. With the scan tool, read TCM DTCs and record on the repair order.
  Are any other TCM DTCs set?
  
  Yes
  - Repair other TCM DTC(s). Refer to DIAGNOSTIC CODE INDEX .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Using the schematics as a guide, check the TCM connector and all related in-line connector terminals for corrosion, damage, or pushed out terminals. Pay particular attention to the power and ground circuits. If no problems are found, replace and program the TCM in accordance with the Service Information. Refer to MODULE, TRANSMISSION CONTROL (TCM), REMOVAL AND INSTALLATION .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .