Dtc P0105 Manifold Absolute Pressure / Barometric Pressure Circuit

Engine. Lexus Is250, Is220D. Gse20 Ale20
2Ad-Fhv Engine Control System. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK MANIFOLD ABSOLUTE PRESSURE SENSOR

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

CHECK TERMINAL VOLTAGE (VC TERMINAL OF MANIFOLD ABSOLUTE PRESSURE SENSOR)

INSPECT TURBOCHARGER SUB-ASSEMBLY

INSPECT EGR VALVE ASSEMBLY

DTC P0105 Manifold Absolute Pressure / Barometric Pressure Circuit

DTC P0107 Manifold Absolute Pressure / Barometric Pressure Circuit Low Input

DTC P0108 Manifold Absolute Pressure / Barometric Pressure Circuit High Input


DESCRIPTION

The manifold absolute pressure sensor detects the intake manifold pressure by using its built-in sensor unit. The ECM determines the basic injection duration and injection advance timing based on the voltage output by the manifold absolute pressure sensor.
Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Engine Control System.Ecd System. Dtc P0105 Manifold Absolute Pressure / Barometric Pressure Circuit
The manifold absolute pressure sensor monitors the absolute pressure inside the intake manifold (default is 0 kPa (0 mmHg, 0 in.Hg)). As a result, the ECM controls the air-fuel ratio at the proper level under any driving conditions, and fuel control accuracy is not influenced by fluctuations in the atmospheric pressure due to factors such as high altitude, etc.

DTC No.
DTC Detection Condition
Trouble Area
P0105
P0107
P0108
Open or short in manifold absolute pressure sensor circuit for 0.8 seconds or more
(1 trip detection logic)
  1. Open or short in manifold absolute pressure sensor circuit
  2. Manifold absolute pressure sensor
  3. Turbocharger assembly
  4. EGR valve assembly
  5. ECM

HINT:
When DTC P0105, P0107, or P0108 is detected, check the intake manifold pressure by entering the following menus on the intelligent tester: Powertrain / Engine / Data List / MAP.

Reference:
Intake Manifold Pressure
Malfunction
Approximately 0 kPa
Short in PIM circuit
250 kPa (1,875 mmHg, 73.8 in.Hg) or more
  1. Open or short in VC circuit
  2. Open in PIM circuit
  3. Open in E2 circuit

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Engine Control System.Ecd System. Dtc P0105 Manifold Absolute Pressure / Barometric Pressure Circuit


INSPECTION PROCEDURE

NOTICE:
After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click here).
HINT:
If DTCs relating to different systems are output, and they share terminal E2 as their ground, check this ground circuit first.
1.CHECK MANIFOLD ABSOLUTE PRESSURE SENSOR

  1. Connect an intelligent tester to the DLC3.

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

  1. Select the following menu items: Powertrain / Engine and ECT / Data List / Map and Atmosphere Pressure.

  1. Read the value displayed on the tester.

    OK:
    MAP:
    Same as atmospheric pressure.
    HINT:
    1 bar of atmospheric pressure is 101 kPa.

  1. Apply a negative pressure of 40 kPa (300 mmHg, 11.8 in.Hg) to the manifold absolute pressure sensor.

    OK:
    MAP:
    MAP decreases 40 kPa from atmospheric pressure.

  1. Apply a positive pressure of 69 kPa (518 mmHg, 20.4 in.Hg) to the manifold absolute pressure sensor.

    OK:
    MAP:
    MAP increases 69 kPa from atmospheric pressure.


OK
Go to step 3
NG


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


    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Engine Control System.Ecd System. Dtc P0105 Manifold Absolute Pressure / Barometric Pressure Circuit

  1. Disconnect the E67 sensor connector.

  1. Disconnect the E59 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    PIM (E67-2) - PIM (E59-117)
    		Below 1 Ω
    VC (E67-3) - VCPM (E59-71)
    		Below 1 Ω
    E (E67-1) - EPIM (E59-94)
    		Below 1 Ω
    PIM (E67-2) or PIM (E59-117) - Body ground
    		10 kΩ or higher
    VC (E67-3) or VCPM (E59-71) - Body ground
    		10 kΩ or higher
    E (E67-1) or EPIM (E59-94) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR

3.CHECK TERMINAL VOLTAGE (VC TERMINAL OF MANIFOLD ABSOLUTE PRESSURE SENSOR)


    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Engine Control System.Ecd System. Dtc P0105 Manifold Absolute Pressure / Barometric Pressure Circuit

  1. Disconnect the manifold absolute pressure sensor.

  1. Turn the engine switch ON (IG).

  1. Measure the voltage.

    Standard voltage:
    Tester Connection
    		Specified Condition
    VC (E67-3) - E (E67-1)
    		4.5 to 5.5 V


NG
REPLACE ECM
OK


4.INSPECT TURBOCHARGER SUB-ASSEMBLY

  1. Check the turbocharger sub-assembly (Click here).

    OK:
    None of the inspection results show any abnormalities.


NG
REPLACE TURBOCHARGER SUB-ASSEMBLY
OK


5.INSPECT EGR VALVE ASSEMBLY

  1. Check the EGR valve assembly (Click here).



NG
REPLACE EGR VALVE ASSEMBLY
OK

REPLACE ECM