ECD SYSTEM, Diagnostic DTC:P0105, P0107, P0108

DTC Code DTC Name
P0105 Manifold Absolute Pressure / Barometric Pressure Circuit
P0107 Manifold Absolute Pressure / Barometric Pressure Circuit Low Input
P0108 Manifold Absolute Pressure / Barometric Pressure Circuit High Input

DESCRIPTION

By a built-in sensor unit, the manifold absolute pressure sensor detects the intake manifold pressure as a voltage. The ECM then determines the basic injection duration and basic ignition advance angle based on this voltage.

Since the manifold absolute pressure sensor does not use the atmospheric pressure as a criterion, but senses the absolute pressure inside the intake manifold (the pressure in proportion to the preset absolute vacuum 0), it is not influenced by fluctuations in the atmospheric pressure due to high altitude and other factors. This permits it to control the air fuel ratio at the proper level under all conditions.

A01CGRCE11
DTC No. DTC Detection Condition Trouble Area
P0105

After engine is started, condition (a) continues for more than 2.0 seconds

(a) Open or short in manifold absolute pressure sensor circuit for 0.5 seconds or more

  • Open or short in manifold absolute pressure sensor circuit

  • Manifold absolute pressure sensor

  • ECM
P0107

After engine is started, condition (a) continues for more than 2.0 seconds

(a) Short in manifold absolute pressure sensor circuit for 0.5 seconds or more

  • Open or short in manifold absolute pressure sensor circuit

  • Manifold absolute pressure sensor

  • ECM
P0108

After engine is started, condition (a) continues for more than 2.0 seconds

(a) Open in manifold absolute pressure sensor circuit for 0.5 seconds or more

  • Open or short in manifold absolute pressure sensor circuit

  • Manifold absolute pressure sensor

  • ECM

Tech Tips

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

Intake Manifold Pressure (kPa) Malfunction
Approximately 0 Short in PIM or E2 circuit
255

  • Short in VC or PIM circuit

  • Open in PIM circuit

  • Open in E2 circuit

WIRING DIAGRAM

A01CGVOE01

INSPECTION PROCEDURE

Note

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

Tech Tips


  • If DTCs that are related to different systems are output simultaneously while terminal E2 is used as a ground terminal, terminal E2 may have an open circuit.

  • Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, as well as other data recorded at the time of a malfunction.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (MANIFOLD ABSOLUTE PRESSURE)


    1. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the tester on.

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

    6. Read the value.

      OK
      Same value as the actual atmospheric pressure.

      Tech Tips


      • Standard atmospheric pressure is 101 kPa. For every 100 m increase in altitude, pressure drops by 1 kPa. Varies by weather (high atmospheric pressure, low atmospheric pressure).

      • Also, check "Atmospheric Pressure" in the Data List.

      Result
      Result Proceed to
      NG A
      OK B

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  2. CHECK ECM (VC VOLTAGE)


    1. A01CGXCE88
      Text in Illustration
      *1

      Component with harness connected

      (ECM)

      Turn the ignition switch to ON.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E22-18 (VC) - E22-28 (E2) Ignition switch ON 4.5 to 5.5 V

    NG

    REPLACE ECM Click here

    OK

  3. CHECK ECM (PIM VOLTAGE)


    1. A01CGXCE89
      Text in Illustration
      *1

      Component with harness connected

      (ECM)

      Turn the ignition switch to ON.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      E23-28 (PIM) - E22-28 (E2) Negative pressure of 93 kPa (698 mmHg, 27.5 in.Hg) applied 0.25 to 0.4 V
      E23-28 (PIM) - E22-28 (E2) Positive pressure of 150 kPa (1125 mmHg, 44 in.Hg) applied 1.0 to 1.4 V

    NG

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

    OK

    REPLACE ECM Click here

  4. 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
      T2-2 (PB) - E23-28 (PIM) Always Below 1 Ω
      T2-3 (VC) - E22-18 (VC) Always Below 1 Ω
      T2-1 (GND) - E22-28 (E2) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      T2-2 (PB) or E23-28 (PIM) - Body ground Always 10 kΩ or higher
      T2-3 (VC) or E22-18 (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 (MANIFOLD ABSOLUTE PRESSURE SENSOR - ECM)

    OK

    REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR