SFI SYSTEM, Diagnostic DTC:P003373

DTC Code DTC Name
P003373 Turbocharger / Supercharger Bypass Valve "A" Control Actuator Stuck Closed

DESCRIPTION

Refer to DTC P003312.

Click here

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P003373 Turbocharger / Supercharger Bypass Valve "A" Control Actuator Stuck Closed The boost pressure does not drop despite control to open the air by-pass valve being commanded (1 trip detection logic).

  • Turbocharger sub-assembly (air by-pass valve)

  • No. 1 turbo pressure sensor

  • Wire harness or connector

  • ECM

 Does not come on DTC stored SAE Code: P0039

MONITOR DESCRIPTION

If the throttle valve is closed while boost pressure is being applied, the air by-pass valve opens and the excess pressure between the turbocharger and the throttle valve is released. If the boost pressure does not drop for a certain amount of time despite control to open the air by-pass valve being commanded, the ECM determines that the air by-pass valve is stuck closed and stores this DTC.

CONFIRMATION DRIVING PATTERN

B008M5LE19

  1. Connect the GTS to the DLC3.

  2. Turn the ignition switch to ON.

  3. Turn the GTS on.

  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  5. Turn the ignition switch off and wait for at least 30 seconds.

  6. Turn the ignition switch to ON.

  7. Turn the GTS on.

  8. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [A].

  9. Accelerate to 50 km/h (31 mph) or more with the accelerator pedal fully depressed [B].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  10. Quickly release the accelerator pedal from the fully depressed position [C].

  11. Enter the following menus: Powertrain / Engine / Trouble Codes [D].

  12. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, the system is normal.

WIRING DIAGRAM


CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following 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. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P003373)


    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 / Trouble Codes.


      Powertrain > Engine > Trouble Codes

    5. Read the DTCs.

      Result
      Result Proceed to
      DTC P003373 is output A
      DTC P003373 and other DTCs are output B

      Tech Tips

      If any DTCs other than P003373 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (ACTIVATE THE AIR BYPASS VALVE)


    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 / Active Test / Activate the Air Bypass Valve / Data List / All Data / Air Bypass Valve Control.


      Powertrain > Engine > Active Test
      Active Test Display
      Activate the Air Bypass Valve
      Data List Display
      Air Bypass Valve Control

    5. According to the display on the GTS, perform the Active Test and check the operation and operation sound of the air by-pass valve.

      OK
      Active Test Standard
      ON

      • ON is displayed for Data List item "Air Bypass Valve Control"

      • Air by-pass valve operates (operation sound is normal)
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT AIR BY-PASS VALVE Click here

    OK

  3. INSPECT NO. 1 TURBO PRESSURE SENSOR


    1. Inspect the No. 1 turbo pressure sensor.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 11 Click here

    NG

  4. CHECK TERMINAL VOLTAGE (POWER SOURCE OF NO. 1 TURBO PRESSURE SENSOR)

    B008KDYC31
    *a

    Front view of wire harness connector

    (to No. 1 Turbo Pressure Sensor)

    1. Disconnect the No. 1 turbo 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
      C3-3 (VC) - C3-2 (E2) Ignition switch ON 4.75 to 5.25 V
      C3-1 (PIM) - C3-2 (E2) Ignition switch ON 3.0 to 5.25 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (NO. 1 TURBO PRESSURE SENSOR - ECM) Click here

    OK

  5. REPLACE NO. 1 TURBO PRESSURE SENSOR


    1. Replace the No. 1 turbo pressure sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  6. CHECK WHETHER DTC OUTPUT RECURS (P003373)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTC.


      Powertrain > Engine > Clear DTCs

    5. Turn the ignition switch off and wait for at least 30 seconds.

    6. Turn the ignition switch to ON.

    7. Turn the GTS on.

    8. Start the engine and warm it up.

    9. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

    10. Enter the following menus: Powertrain / Engine / Trouble Codes.


      Powertrain > Engine > Trouble Codes

    11. Read the DTCs.

      Result
      Result Proceed to
      DTC P003373 is output A
      DTCs are not output B

    A

    GO TO STEP 8 Click here

    B

    END

  7. CHECK HARNESS AND CONNECTOR (NO. 1 TURBO PRESSURE SENSOR - ECM)


    1. Disconnect the C3 No. 1 turbo pressure sensor connector.

    2. Disconnect the C62 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C3-3 (VC) - C62-140 (VPTA) Always Below 1 Ω
      C3-2 (E2) - C62-139 (EPTA) Always Below 1 Ω
      C3-1 (PIM) - C62-108 (PTA) Always Below 1 Ω
      C3-3 (VC) or C62-140 (VPTA) - Body ground and other terminals Always 10 kΩ or higher
      C3-1 (PIM) or C62-108 (PTA) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. INSPECT AIR BY-PASS VALVE


    1. Inspect the air by-pass valve.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TURBOCHARGER SUB-ASSEMBLY (AIR BY-PASS VALVE MALFUNCTION) Click here

    OK

  9. CHECK TERMINAL VOLTAGE (POWER SOURCE OF AIR BY-PASS VALVE)

    B008KBTC18
    *a Front view of wire harness connector (to Air By-pass Valve)

    1. Disconnect the air by-pass valve 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
      C53-1 (+B) - Body ground Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK ECM POWER SOURCE CIRCUIT Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (AIR BY-PASS VALVE - ECM)


    1. Disconnect the C53 air by-pass valve connector.

    2. Disconnect the C62 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C53-2 (ABV) - C62-67 (ABV) Always Below 1 Ω
      C53-2 (ABV) or C62-67 (ABV) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK WHETHER DTC OUTPUT RECURS (P003373)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTC.


      Powertrain > Engine > Clear DTCs

    5. Turn the ignition switch off and wait for at least 30 seconds.

    6. Turn the ignition switch to ON.

    7. Turn the GTS on.

    8. Start the engine and warm it up.

    9. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

    10. Enter the following menus: Powertrain / Engine / Trouble Codes.


      Powertrain > Engine > Trouble Codes

    11. Read the DTCs.

      Result
      Result Proceed to
      DTC P003373 is output A
      DTCs are not output B

    A

    REPLACE ECM Click here

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here