ECD SYSTEM(w/ Glow Plug Controller), Diagnostic DTC:P0069

DTC Code DTC Name
P0069 Manifold Absolute Pressure - Barometric Pressure Correlation

DESCRIPTION

To detect atmospheric pressure, the atmospheric pressure sensor built into the ECM is used in the common rail system. Following the changes in the atmospheric pressure, the ECM corrects the fuel injection volume, timing and duration, and adjusts the common rail internal fuel pressure to optimize combustion.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0069 Manifold Absolute Pressure - Barometric Pressure Correlation After the ignition switch is turned to ON, the difference between the atmospheric pressure sensor output and diesel turbo pressure sensor output is higher than 8 kPa for 0.5 seconds (2 trip detection logic).

  • Diesel turbo pressure sensor

  • ECM

 Comes on DTC stored
DTC Detection Drive Pattern
DTC No. DTC Detection Drive Pattern
P0069 1 second elapses after ignition switch turned from off to ON (starter remains off)
Related Data List
DTC No. Data List
P0069

  • Atmosphere Pressure

  • MAP

Tech Tips


  • Turn the ignition switch to ON and check the Atmosphere Pressure and MAP items in the Data List. If the atmospheric pressure displayed on the GTS differs greatly from the actual atmospheric pressure (standard: 101 kPa), the sensor (atmospheric pressure sensor or diesel turbo pressure sensor) is malfunctioning.

  • If DTC P0069 is stored, the following symptoms may appear:


    • Misfire

    • Combustion noise

    • Black smoke

    • White smoke

    • Lack of power

CAUTION / NOTICE / HINT

Note

When replacing the ECM, perform ECM Initialization and Registration.

Click here

Tech Tips


  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing a new ECM, perform all of the initialization and registration procedures for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0069)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    4. Read the DTCs.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Result Proceed to
      DTC P0069 is output A
      DTC P0069 and other DTCs are output B

      Tech Tips

      If any DTCs other than P0069 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. INSPECT DIESEL TURBO PRESSURE SENSOR

    Tech Tips

    Before inspecting the diesel turbo pressure sensor, perform a wire harness inspection and if there are any problems with the wire harness, repair or replace it.


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / MAP.


      Powertrain > Engine and ECT > Data List
      Tester Display
      MAP

    5. Read the value.

      OK
      Same value as the actual atmospheric pressure.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE DIESEL TURBO PRESSURE SENSOR Click here

    OK

  3. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 5 Click here

  4. REPLACE DIESEL TURBO PRESSURE SENSOR


    1. Replace the diesel turbo pressure sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  5. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTC.


      Powertrain > Engine and ECT > Clear DTCs

    5. Turn the ignition switch off and wait for 30 seconds or more.

    6. Turn the ignition switch to ON and wait for 1 second.

    7. Turn the GTS on.

    8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.

    9. Confirm that the pending DTC is not output again.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Proceed to
      NEXT

    NEXT

    END