LEMON Manuals: Even more car manuals for everyone
Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 433 (6.7L Diesel - DTCS P0008 To P040D - 2500 Hd & 3500 Hd) >> Diagnosis And Testing >> P0255-Injection Pump Fuel Control Circuit Performance >> 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 up to two minutes.
    5. With the scan tool, read DTCs.

      Did the DTC reset?

      Yes 

      • Go To  2

      No 

  2. CHECK FOR HIGH RESISTANCE IN THE (K398) FUEL CONTROL ACTUATOR DRIVER CIRCUIT 
    2. Turn the ignition off.
    3. Disconnect the Fuel Control Actuator harness connector.
    4. Disconnect the PCM C1 harness connector.
      NOTE:

      Check connectors - Clean/repair as necessary.

    5. Measure the resistance of the (K398) FCA Driver circuit between the Fuel Control Actuator harness connector and the PCM C1 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  3

      No 

      • Repair the (K398) Fuel Control Actuator Driver circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  3. CHECK FOR HIGH RESISTANCE IN THE (K396) FUEL CONTROL ACTUATOR RETURN CIRCUIT 
    2. Measure the resistance of the (K396) FCA Return circuit between the Fuel Control Actuator harness connector and the PCM C1 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  4

      No 

      • Repair the (K396) FCA Return circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  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 let idle for at least two minutes.
    5. With the scan tool, read DTCs.

      Did the DTC reset?

      Yes 

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

      No 

      • Test complete.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
scientia non olet · About LEMON Manuals