Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 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, record all Freeze frame data.
3. With the scan tool, erase DTCs.
4. Turn the ignition off for 75 seconds.
5. Turn the ignition on.
6. With the scan tool, read DTCs.
  Did the DTC reset?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
CHECK THE (K31) FUEL LIFT PUMP CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Turn the ignition on.
4. Measure for voltage on the (K31) Fuel Lift Pump Control circuit at the PCM C2 harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (K31) Fuel Lift Pump Control circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
CHECK THE PCM/PDC
1. Turn Ignition off.
2. Disconnect the PDC C3 harness connector.
3. Reconnect the PCM C2 harness connector.
4. Turn the ignition on, engine off.
5. Using a 12-Volt test light connected to 12 Volts, probe the (K31) Fuel Lift Pump Control circuit at the PDC C3 harness connector.
6. Toggle the lift pump actuator with the scan tool.
  NOTE:
  The test light must illuminate brightly.
7. Compare the brightness to that of a direct connection to the battery.
  Does the test light cycle on and off and illuminate brightly?
  
  Yes
  - Replace the Power Distribution Center in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  No
  - Replace the Powertrain Control Module (PCM) in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .