SFI SYSTEM, Diagnostic DTC:P0068

DTC Code DTC Name
P0068 MAP / MAF - Throttle Position Correlation

DESCRIPTION

Refer to DTC P0107 Click here.

DTC No. DTC Detection Condition Trouble Area
P0068

One of the following conditions is met (2 trip detection logic):


  • Manifold absolute pressure sensor voltage is less than 1.25 V for 5 seconds or more when throttle position is 16° or more with driving.

  • Manifold absolute pressure sensor voltage is more than 3.3 V for 10 seconds or more when throttle position is 5.13° or less with driving.

  • Open or short in manifold absolute pressure sensor circuit

  • Manifold absolute pressure sensor

  • ECM

MONITOR DESCRIPTION

The manifold absolute pressure sensor is affixed to the intake manifold.

If the manifold absolute pressure is low in spite of driving conditions that would suggest this would be high, or if this is high in spite of driving conditions that would suggest this would be low, then this DTC is detected.

CONFIRMATION DRIVING PATTERN

A004JMCE07

  1. Connect the GTS to the DLC3.

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

  3. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation) Click here.

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

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

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

  7. Perform the following the confirmation driving pattern.

    CAUTION:

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


    1. Idle the engine for 10 seconds or more [A].

    2. Accelerate the vehicle to 97 km/h (60 mph) or more within 20 seconds [B].

    3. Drive the vehicle at 97 km/h (60 mph) or more for 20 seconds or more [C].

    4. Release the accelerator pedal to Decelerate until the vehicle speed decreases to less than 64 km/h (40 mph) [D].

      Tech Tips

      Release the accelerator pedal fully to perform the fuel-cut.

    5. Drive the vehicle at 60 km/h (40 mph) or less for 20 seconds or more [E].

    6. Accelerate the vehicle to 97 km/h (60 mph) or more within 10 seconds [F].

    7. Release the accelerator pedal and stop the vehicle [G].

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

  9. Read pending DTCs.

    Tech Tips


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

    • If a pending DTC is not output, perform the following procedure.

  10. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  11. Input the DTC: P0068.

  12. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

  13. If the test result is INCOMPLETE or N/A and no DTC is output, perform a universal trip and check for permanent DTCs Click here.

    Tech Tips


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

    • If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

Refer to P0107 Click here.

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following 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. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0068)


    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.

    5. Read DTCs.

      Result
      Result Proceed to
      DTC P0068 is output A
      DTC P0068 and other DTCs are output B

    B

    GO TO DTC CHART Click here

    A

  2. CHECK INTAKE SYSTEM


    1. Check the intake system for vacuum leaks Click here.

      OK
      PCV valve and hose are connected correctly and are not damaged.

    NG

    REPAIR OR REPLACE INTAKE SYSTEM

    OK

  3. CHECK PCV HOSE CONNECTIONS


    1. Check the PCV hose connections Click here.

      OK
      No leaks from intake system.

    NG

    REPAIR OR REPLACE PCV HOSE

    OK

  4. REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR


    1. Replace the manifold absolute pressure sensor Click here.


    NEXT

  5. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    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 / Utility / All Readiness.

    11. Input the DTC: P0068.

    12. Check the DTC judgment.

      Result
      GTS Display Description
      NORMAL

      • DTC judgment completed

      • System normal
      ABNORMAL

      • DTC judgment completed

      • System abnormal
      INCOMPLETE

      • DTC judgment not completed

      • Perform driving pattern after confirming DTC enabling conditions
      N/A

      • Unable to perform DTC judgment

      • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    NEXT

    END