Dtc P0069 Manifold Absolute Pressure - Barometric Pressure Correlation


DESCRIPTION

INSPECTION PROCEDURE

CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0069)

INSPECT MANIFOLD ABSOLUTE PRESSURE SENSOR

CHECK DTC OUTPUT

DTC 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.

P0069
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
1 second elapses after engine switch turned from off to on (IG) (starter remains off)
After the engine switch on (IG), the difference between the atmospheric pressure sensor output and manifold absolute pressure sensor output is more than 14 kPa for 0.5 seconds (2 trip detection logic).
  1. Manifold absolute pressure sensor
  2. ECM

Related Data List
DTC No.
Data List
P0069
  1. Atmosphere Pressure
  2. MAP
HINT:
  1. Turn the engine switch on (IG) 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 manifold absolute pressure sensor) is malfunctioning.
  2. If DTC P0069 is stored, the following symptoms may appear:
    1. Misfire
    2. Combustion noise
    3. Black smoke
    4. White smoke
    5. Lack of power

INSPECTION PROCEDURE

NOTICE:
  1. After replacing the ECM, the new ECM needs registration (LandCruiser RM0000012XK0AUX.html) and initialization (LandCruiser RM000000TIN08HX.html).
HINT:
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.
1.CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0069)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG) and turn the GTS on.

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

  1. Read the DTCs.

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

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


B
GO TO DTC CHART (LandCruiser RM0000031HW07OX.html)
A


2.INSPECT MANIFOLD ABSOLUTE PRESSURE SENSOR
HINT:
Before inspecting the manifold absolute 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.

  1. Turn the engine switch on (IG) and turn the GTS on.

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

  1. Read the value.

    OK:
    Same value as the actual atmospheric pressure.


NG
REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR
OK


3.CHECK DTC OUTPUT

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG) and turn the GTS on.

  1. Clear the DTC (LandCruiser RM000000PDK1E5X.html).

  1. Turn the engine switch off and wait for 30 seconds or more.

  1. Turn the engine switch on (IG) for 1 second.

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

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    DTC P0069 is output
    		A
    No DTC is output
    		B



B
END
A

REPLACE ECM (LandCruiser RM0000013Z002DX.html)