Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR TRANSMISSION CONTROL MODULE (TCM) CONTROLLER AREA NETWORK (CAN) BUS DIAGNOSTIC TROUBLE CODES (DTCS)
1. With the scan tool, read TCM DTCs and record on the repair order.
  Are any TCM CAN bus DTCs set?
  
  Yes
  - Repair TCM CAN bus DTCs. If DTC U0001-CAN C BUS is set, perform that diagnostic first. Refer to the DIAGNOSTIC CODE INDEX - 8HP45/845RE AUTOMATIC TRANSMISSION - 1500 article .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Go To 2
CHECK IF ELECTRONIC SHIFT MODULE (ESM) DTCS ARE PRESENT
1. With the scan tool, read ESM DTCs and record on the repair order.
  Are any ESM DTCs set?
  
  Yes
  - Repair ESM 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 . Refer to MODULE, TRANSMISSION CONTROL, MODULE PROGRAMMING .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .