VACUUM SENSOR ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT VACUUM SENSOR ASSEMBLY (w/ Stop And Start System)


    1. Inspect the brake booster.


    2. A00492EC01
      *a

      Front view of wire harness connector

      (Vacuum Sensor Assembly)

      Inspect the power source voltage.


      1. Disconnect the vacuum sensor assembly 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
        A33-3 (VC) - A33-1 (E2) Ignition Switch ON 4.75 to 5.25 V

        If the result is not as specified, check the harness, connector, and engine stop and start ECU.

        Click here

      4. Turn the ignition switch off.

      5. Connect the vacuum sensor assembly connector.

    3. Inspect the atmospheric pressure voltage.


      1. Depress the brake pedal 5 times.

      2. Measure the PB terminal voltage at the engine stop and start ECU according to the value(s) in the table below.

        A0049VUC02
        *a

        Component with harness connected

        (Engine Stop and Start ECU)

        		 - -
        Standard Voltage
        Tester Connection Condition Specified Condition
        A92-13 (PB) - A92-3 (BRE2) Atmospheric pressure 3.4 to 3.8 V

        If the result is not as specified, check the harness and connector.

        Click here

    4. Inspect the brake negative pressure.


      1. Start the engine. Wait for several minutes and stop the engine by turning the ignition switch off.

      2. Connect the GTS to the DLC3.

      3. Turn the ignition switch to ON.

      4. Turn the GTS on.

      5. Enter the following menus: Powertrain /Stop and Start / Data List / Brake Boost Pressure.

      6. Depress the brake pedal 5 times and read the changes in the following pressure value.

        Tech Tips

        The changes in the value can be determined by comparing the pressure value before and after the brake pedal is depressed 5 times.

        Standard
        Tester Display Switch Condition Specified Condition
        Brake Boost Pressure

        • Ignition switch ON

        • Brake pedal depressed 5 times

        		 Changes by 20 kPa (150 mmHg, 6 in.Hg) or more

        If the result is not as specified, check the harness and connector.

        Click here

  2. INSPECT VACUUM SENSOR ASSEMBLY (w/o Stop And Start System)


    1. Inspect the brake booster.


    2. A00492EC01
      *a

      Front view of wire harness connector

      (Vacuum Sensor Assembly)

      Inspect the power source voltage.


      1. Disconnect the vacuum sensor assembly 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
        A33-3 (VC) - A33-1 (E2) Ignition Switch ON 4.75 to 5.25 V

        If the result is not as specified, check the harness, connector, and ECM.

        Click here

      4. Turn the ignition switch off.

      5. Connect the vacuum sensor assembly connector.

    3. Inspect the atmospheric pressure voltage.


      1. Depress the brake pedal 5 times.

      2. Measure the PB terminal voltage at the ECM according to the value(s) in the table below.

        A0046Q0C01
        *a

        Component with harness connected

        (ECM)

        		 - -
        Standard Voltage
        Tester Connection Condition Specified Condition
        A58-40 (PB) - A58-54 (EPB) Atmospheric pressure 1.5 to 2.0 V

        If the result is not as specified, check the harness and connector.

        Click here

    4. Inspect the brake negative pressure.


      1. Start the engine. Wait for several minutes and stop the engine by turning the ignition switch off.

      2. Connect the GTS to the DLC3.

      3. Turn the ignition switch to ON.

      4. Turn the GTS on.

      5. Enter the following menus: Powertrain / Engine and ECT / Data List / Brake Boost Pressure.

      6. Depress the brake pedal 5 times and read the changes in the following pressure value.

        Tech Tips

        The changes in the value can be determined by comparing the pressure value before and after the brake pedal is depressed 5 times.

        Standard
        Tester Display Switch Condition Specified Condition
        Brake Boost Pressure

        • Ignition switch ON

        • Brake pedal depressed 5 times

        		 Changes by 20 kPa (150 mmHg, 6 in.Hg) or more

        If the result is not as specified, check the harness and connector.

        Click here