SFI SYSTEM, Diagnostic DTC:P0107, P0108

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

DESCRIPTION

The vacuum sensor uses a built-in sensor to detect pressure inside the intake manifold as an absolute pressure and outputs a voltage. Based on the voltage from the vacuum sensor, the ECM controls the purge VSV and corrects any errors in the air fuel ratio due to changes in pressure.

A01ITS0E01
DTC No. DTC Detection Condition Trouble Area
P0107 The vacuum sensor voltage is below 0.5 V for 0.5 seconds (1 trip detection logic).

  • Open or short in vacuum sensor circuit

  • Vacuum sensor

  • ECM
P0108 The vacuum sensor voltage is higher than 4.5 V for 0.5 seconds (1 trip detection logic).

  • Open or short in vacuum sensor circuit

  • Vacuum sensor

  • ECM

Tech Tips

When any of these DTCs are output, check the manifold absolute pressure using the GTS. Enter the following menus: Powertrain / Engine and ECT / Data List / MAP.

MAP Malfunction
Approximately 0 kPa

  • Short in PIM circuit to ground

  • Short in PIM circuit to E2 circuit
130 kPa or higher

  • Open in VC circuit or short in VC circuit to PIM circuit

  • Open in PIM circuit

  • Open in E2 circuit

WIRING DIAGRAM

A01IR66E58

INSPECTION PROCEDURE

Tech Tips

Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. READ VALUE USING GTS (MANIFOLD ABSOLUTE PRESSURE)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Read the MAP value.

      Result
      Result Proceed to
      0 kPa A
      130 kPa or higher B
      Approximately same as atmospheric pressure C

    B

    CHECK VACUUM SENSOR (POWER SOURCE) Click here

    C

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  2. READ VALUE USING GTS (MANIFOLD ABSOLUTE PRESSURE)


    1. Connect the GTS to the DLC3.

    2. A01IR96E04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Vacuum Sensor)

      Disconnect the vacuum sensor connector.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

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

    6. Check how the "MAP" displayed on the GTS changes compared to the value measured before disconnecting the connector of the vacuum sensor.

      Result
      Result Proceed to
      Changes (From approximately 0 kPa (0 mmHg, 0 in.Hg) to a value of 130 kPa (975 mmHg, 38.4 in.Hg) or higher) A
      Does not change (Approximately 0 kPa (0 mmHg, 0 in.Hg)) B

    7. Reconnect the vacuum sensor connector.


    B

    CHECK HARNESS AND CONNECTOR (VACUUM SENSOR - ECM) Click here

    A

    REPLACE VACUUM SENSOR Click here

  3. CHECK VACUUM SENSOR (POWER SOURCE)


    1. A01IR96E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Vacuum Sensor)

      Disconnect the vacuum sensor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C107-3 (VC) - C107-1 (E2) Ignition switch ON 4.5 to 5.5 V

    3. Reconnect the vacuum sensor connector.


    NG

    CHECK HARNESS AND CONNECTOR (VACUUM SENSOR - ECM) Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (VACUUM SENSOR - ECM)


    1. Disconnect the vacuum sensor connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      C107-2 (PIM) - C111-78 (PIM) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      C107-2 (PIM) or C111-78 (PIM) - Body ground Always 10 kΩ or higher

    4. Reconnect the ECM connector.

    5. Reconnect the vacuum sensor connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (VACUUM SENSOR - ECM)

    OK

  5. REPLACE VACUUM SENSOR


    1. Replace the vacuum sensor Click here.


    NEXT

  6. CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs Click here.

    3. Turn the ignition switch off.

    4. Turn the ignition switch to ON and turn the GTS on.

    5. After the engine is started, race the engine for 1 second.

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

    7. Read the DTCs.

      Result
      Display (DTC output) Proceed to
      No DTC is output A
      DTC P0107 or P0108 is output B

    B

    REPLACE ECM Click here

    A

    END

  7. CHECK HARNESS AND CONNECTOR (VACUUM SENSOR - ECM)


    1. Disconnect the vacuum sensor connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      C107-2 (PIM) - C111-78 (PIM) Always Below 1 Ω
      C107-3 (VC) - C111-77 (VCPM) Always Below 1 Ω
      C107-1 (E2) - C111-76 (EPIM) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      C107-2 (PIM) or C111-78 (PIM) - Body ground Always 10 kΩ or higher
      C107-3 (VC) or C111-77 (VCPM) - Body ground Always 10 kΩ or higher

    4. Reconnect the ECM connector.

    5. Reconnect the vacuum sensor connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (VACUUM SENSOR - ECM)

    OK

    REPLACE ECM Click here