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 OTHER DTCS
1. Ignition on, engine not running.
2. With the scan tool, read DTCs.
  Are there any other DEF system DTCs active?
  
  Yes
  - Repair all other DEF system DTCs before proceeding with this test procedure.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 2
U11C1 ACTIVE
Is DTC U11C1 active?

Yes
- Go To 3
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
DEF DOSING CONTROL UNIT
1. Check the DEF DCU for proper application.
2. Check the DEF DCU to confirm that the flash is correct and up to date.
  Is it the correct DEF DCU with the latest flash update?
  
  Yes
  - Go To 4
  No
  - Replace the DEF Dosing Control Unit (if application is not correct). Use the latest flash update.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
POWERTRAIN CONTROL MODULE
1. Replace the DEF Dosing Control Module in accordance with the latest Service Information.
2. Turn the ignition on.
3. With the scan tool, record all Freeze frame data.
4. With the scan tool, erase DTCs.
5. Turn the ignition off for 30 seconds.
6. Start the engine. It may be necessary to test drive the vehicle.
7. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Powertrain Control Module in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Repair is complete.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .