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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 433 (6.7L Diesel - DTCS P0008 To P040D - 2500 Hd & 3500 Hd) >> Diagnosis And Testing >> P0253-Injection Pump Fuel Control Circuit Low >> Diagnostic Test

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.
  1. ACTIVE DTC 
    1. Ignition on, engine not running.
    2. Record freeze frame data and clear DTCs.
    3. Turn the ignition off for 75 seconds.
    4. Start the engine and let idle for at least two minutes.
    5. With the scan tool, read DTCs.

      Did the DTC reset?

      Yes 

      • Go To  2

      No 

  2. CHECK THE (K398) FUEL CONTROL ACTUATOR DRIVER CIRCUIT FOR A SHORT TO GROUND 
    1. Turn the ignition off.
    2. Disconnect the PCM C1 harness connector.
    3. Disconnect the Fuel Control Actuator harness connector.
    4. Measure the resistance between ground and the (K398) FCA Driver circuit at the FCA harness connector.

      Is the resistance below 10k Ohms?

      Yes 

      • Repair the (K398) FCA Driver circuit for a short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .

      No 

      • Go To  3
  3. CHECK FOR THE (K398) FCA DRIVER CIRCUIT SHORTED TO THE (K396) FCA RETURN CIRCUIT 
    1. Measure the Resistance between the (K398) FCA Driver circuit and the (K396) FCA Return circuit at the Fuel Control Actuator harness connector.

      Is the resistance below 10k Ohms?

      Yes 

      • Repair the short between the (K398) FCA Driver circuit and the (K396) FCA Return circuit.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .

      No 

      • Go To  4
  4. FUEL CONTROL ACTUATOR 
    1. Reconnect the PCM C1 harness connector.
    2. Replace the Fuel Control Actuator in accordance with the service information.
    3. Turn the ignition on and clear any DTCs.
    4. Start the engine and allow it to idle for at least two minutes.
    5. With the scan tool, read DTCs.

      Did the DTC reset?

      Yes 

      • Replace the Powertrain Control Module in accordance with the service information.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .

      No 

      • Repair complete.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
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