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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 >> P0103-Mass Air Flow Sensor "A" Circuit High >> 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 
    NOTE:

    The MAF Sensor, EGR Cooler Bypass Valve and Turbocharger Actuator get a 12V power supply from the PCM.

    1. Ignition on, engine not running.
    2. Record freeze frame data and clear DTCs.
    3. Turn the ignition off for one minute.
    4. Turn the ignition on.
    5. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

  2. CHECK THE (K157) MAF SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE 
    1. Turn the ignition off.
    2. Disconnect the MAF Sensor harness connector.
    3. Turn the ignition on.
    4. Measure the voltage of the (K157) MAF Sensor Signal circuit in the MAF Sensor harness connector.

      Is the voltage equal to battery voltage?

      Yes 

      • Repair the short to battery in the (K157) MAF Sensor Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .

      No 

      • Go To  3
  3. CHECK THE (K957) MAF SENSOR RETURN CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    1. Turn the ignition off.
    2. Disconnect the PCM C1 harness connector.
    3. Measure the resistance of the (K957) MAF Sensor Return circuit between the MAF Sensor harness connector and the PCM C1 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  4

      No 

      • Repair the (K957) Mass Air Flow Sensor Return circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .
  4. CHECK THE MASS AIR FLOW SENSOR 
    1. Turn the ignition off.
    2. Reconnect the PCM C1 harness connector.
    3. Reconnect the MAF Sensor harness connector.
    4. Turn the ignition on, engine not running.
    5. With the scan tool, clear DTCs.
    6. Disconnect the MAF Sensor harness connector and read DTCs.

      Does the scan tool display DTC P0102 as active?

      Yes 

      • Replace the Mass Air Flow Sensor in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to STANDARD PROCEDURE .

      No 

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