Dtc P0105 Manifold Absolute Pressure / Barometric Pressure Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (MAP)

CHECK ECM (VC VOLTAGE)

CHECK ECM (PIM VOLTAGE)

CHECK WIRE HARNESS (MANIFOLD ABSOLUTE PRESSURE SENSOR - ECM)

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

Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P0105 Manifold Absolute Pressure / Barometric Pressure Circuit
The manifold absolute pressure sensor detects the intake manifold pressure by using the 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.
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 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
0.5 seconds or more
(1 trip detection logic)
  1. Open or short in manifold absolute pressure sensor circuit
  2. Manifold absolute pressure sensor
  3. Turbocharger sub-assembly
  4. ECM

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P0105 Manifold Absolute Pressure / Barometric Pressure Circuit


INSPECTION PROCEDURE

HINT:
  1. If DTCs related to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.
  2. Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, and other data from the time the malfunction occurred.
NOTICE:
If the ECM is replaced, the new ECM needs initialization (Toyota Fortuner RM000000TIN04NX.html).
1.READ VALUE USING INTELLIGENT TESTER (MAP)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch ON and turn the intelligent tester ON.

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

  1. Read the values.

    Standard:
    Same value as the actual atmospheric pressure.


OK
CHECK FOR INTERMITTENT PROBLEMS
NG


2.CHECK ECM (VC VOLTAGE)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P0105 Manifold Absolute Pressure / Barometric Pressure Circuit

  1. Turn the ignition switch ON.

  1. Measure the voltage of the ECM connector.

    Standard voltage:
    Tester Connection
    		Specified Condition
    E7-18 (VC) - E7-28 (E2)
    		4.5 to 5.5 V


NG
REPLACE ECM
OK


3.CHECK ECM (PIM VOLTAGE)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P0105 Manifold Absolute Pressure / Barometric Pressure Circuit

  1. Turn the ignition switch ON.

  1. Measure the voltage of the ECM connectors.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E6-28 (PIM) - E7-28 (E2)
    		Applied negative pressure of 40 kPa (300 mmHg, 11.8 in.Hg)
    		1.3 to 1.9 V
    E6-28 (PIM) - E7-28 (E2)
    		Same as atmospheric pressure
    		2.4 to 3.1 V
    E6-28 (PIM) - E7-28 (E2)
    		Applied positive pressure of 170 kPa (1,275 mmHg, 50.2 in.Hg)
    		3.7 to 4.3 V


OK
REPLACE ECM
NG


4.CHECK WIRE HARNESS (MANIFOLD ABSOLUTE PRESSURE SENSOR - ECM)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P0105 Manifold Absolute Pressure / Barometric Pressure Circuit

  1. Disconnect the T9 sensor connector.

  1. Disconnect the E6 and E7 ECM connectors.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    T9-2 (PIM) - E6-28 (PIM)
    		Below 1 Ω
    T9-3 (VC) - E7-18 (VC)
    		Below 1 Ω
    T9-1 (E) - E7-28 (E2)
    		Below 1 Ω
    T9-2 (PIM) or E6-28 (PIM) - Body ground
    		10 kΩ higher
    T9-3 (VC) or E7-18 (VC) - Body ground
    		10 kΩ higher
    T9-1 (E) or E7-28 (E2) - Body ground
    		10 kΩ higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


5.INSPECT TURBOCHARGER SUB-ASSEMBLY
OK:
None of the inspection results show any abnormalities.


NG
REPLACE TURBOCHARGER SUB-ASSEMBLY
OK


6.INSPECT EGR VALVE ASSEMBLY
OK:
None of the inspection results show any abnormalities.


NG
REPLACE EGR VALVE ASSEMBLY
OK

REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR