Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, View DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION - 6.7L diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
CHECK FOR THE (F203) SCR RELAY 1 HEATER SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Remove the F19 30A Fuse located in the PDC.
3. Disconnect the DEF Dosing Control Unit C2 harness connector.
4. Turn the ignition on.
5. Measure the voltage on the (F203) SCR Module Heater Supply circuit at the DEF Dosing Control Unit harness connector.
  Is there voltage present?
  
  Yes
  - Go To 3
  No
  - Replace the DEF Dosing Control Unit in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK FOR THE (F203) SCR RELAY 1 HEATER SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the PDC C5 harness connector.
3. Turn the ignition on.
4. Measure the voltage on the (F203) SCR Module Heater Supply circuit at the PDC C5 harness connector (PDC side).
  Is there voltage present?
  
  Yes
  - Replace the Power Distribution Center in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Repair the (F203) SCR Module Heater Supply circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .