ECD SYSTEM, Diagnostic DTC:P0069

DTC Code DTC Name
P0069 MAP Sensor Too High or Too Low

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 for optimizing combustion.

P0069
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
1 second elapses after ignition switch turned from off to ON (starter remains off) After the ignition switch is turned to ON, the difference between the atmospheric pressure sensor output and manifold absolute pressure sensor output is more than 8 kPa for 0.5 seconds (2 trip detection logic).

  • Manifold absolute pressure sensor

  • Open or short in manifold absolute pressure sensor circuit

  • Atmospheric pressure sensor (built into ECM)

WIRING DIAGRAM

Refer to DTC P0107 Click here.

INSPECTION PROCEDURE

Note

After replacing the ECM, the new ECM needs registration Click here and initialization Click here.

PROCEDURE


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


    1. Read the DTCs using the intelligent tester.

      Result
      Display (DTC output) Proceed to
      DTC P0069 is output A
      DTC P0069 and other DTCs are output B

      Tech Tips

      If codes other than P0069 are output, perform troubleshooting for those DTCs first.


    B

    GO TO DTC CHART

    A

  2. CHECK HARNESS AND CONNECTOR (MANIFOLD ABSOLUTE PRESSURE SENSOR - ECM)


    1. Disconnect the manifold absolute pressure sensor connector.

    2. Disconnect the ECM connectors.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      V9-2 (PIM) - E36-5 (PIM) Always Below 1 Ω
      V9-3 (VC) - E36-13 (VC) Always Below 1 Ω
      V9-1 (E) - E36-14 (E2) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      V9-2 (PIM) or E36-5 (PIM) - Body ground Always 10 kΩ or higher
      V9-3 (VC) or E36-13 (VC) - Body ground Always 10 kΩ or higher

    4. Reconnect the manifold absolute pressure sensor connector.

    5. Reconnect the ECM connectors.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT MANIFOLD ABSOLUTE PRESSURE SENSOR


    1. Inspect the manifold absolute pressure sensor Click here.


    NG

    REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR Click here

    OK

    REPLACE ECM