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, View DTCs.
  Is DTC U010E active?
  
  Yes
  - Perform the diagnostic procedure for U010E before continuing.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 2
U040F ACTIVE
Is DTC U040F active?

Yes
- Go To 3
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK THE DEF DCU CONNECTOR FOR CORROSION OR FOREIGN MATERIAL
1. Turn the ignition on.
2. With the scan tool, record all Freeze frame data.
3. With the scan tool, erase DTCs.
4. Disconnect the DEF Dosing Control Unit C1 harness connector.
  NOTE:
  Check connectors for corrosion or foreign materials- Clean/repair as necessary.
5. Reconnect the DEF Dosing Control Unit C1 harness connector.
6. Test drive the vehicle for an extended amount of time.
  Did the DTC return?
  
  Yes
  - Go To 4
  No
  - Repair is complete.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
POWERTRAIN CONTROL MODULE
Are there invalid or implausible data DTCs present for other components on the J1939 Data Link?

Yes
- Replace the Powertrain Control Module in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Replace the DEF Dosing Control Unit in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .