SFI SYSTEM (w/o Electronic Throttle Control 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

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.

A01376RE01
DTC No. DTC Detection Condition Trouble Area
P0107 The output voltage from the vacuum sensor remains 0.1 V or less for 2 seconds or more (1 trip detection logic).

  • Open or short in manifold absolute pressure sensor circuit

  • Manifold absolute pressure sensor

  • ECM
P0108 The output voltage from the vacuum sensor remains 4.9 V or more for 2 seconds or more (1 trip detection logic).

  • Open or short in manifold absolute pressure sensor circuit

  • Manifold absolute pressure sensor

  • ECM

Tech Tips


  • DTC P0107 and P0108 are detected when the ignition switch is ON for approximately 10 seconds.

  • After confirming DTC P0107 or P0108, use the intelligent tester to confirm the vacuum from the Data List.

Manifold Absolute Pressure (kPa) Malfunction
Approximately 0

  • PIM, E2 circuit short
130 or more

  • VC, PIM circuit short

  • PIM circuit open

  • E2 circuit open

  • ECM

WIRING DIAGRAM

A01381WE02

INSPECTION PROCEDURE

Tech Tips

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 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 INTELLIGENT TESTER (MAP)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON and turn the tester on.

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

    4. Read the MAP value at idling and 2000 rpm.

      Standard
      Switch Condition Tester Display
      Ignition switch ON (do not start engine) 50 to 115 kPa

    NG

    CHECK TERMINAL VOLTAGE (MANIFOLD ABSOLUTE PRESSURE SENSOR) Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

  2. CHECK TERMINAL VOLTAGE (MANIFOLD ABSOLUTE PRESSURE SENSOR)


    1. A01375RE03

      Disconnect the manifold absolute pressure sensor connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B14-3 (VC) - B14-2 (E2) Ignition switch ON 4.5 to 5.5 V
      Result
      Result Proceed to
      Outside standard range A
      Within standard range B

    B

    REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR Click here

    A

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


    1. A0138X5E04

      Disconnect the manifold absolute pressure 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
      B14-3 (VC) - B25-56 (VC2) Always Below 1 Ω
      B14-2 (E2) - B25-53 (E21) Always Below 1 Ω
      B14-1 (PIM) - B25-52 (PIM) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      B14-3 (VC) or B25-56 (VC2) - Body ground Always 10 kΩ or higher
      B14-1 (PIM) or B25-52 (PIM) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here

  4. REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR


    1. Replace the manifold absolute pressure sensor Click here.


    NEXT

  5. CHECK WHETHER DTC OUTPUT RECURS (P0107 OR P0108)


    1. Clear DTC using the intelligent tester.

    2. Turn the ignition switch to ON and wait for 10 seconds.

    3. Enter the following menus: Powertrain / Engine and ECT / DTC.

    4. Read DTCs.

      OK
      No DTC output.

    NG

    REPLACE ECM Click here

    OK

    END