CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM, Diagnostic DTC:P0841, P2829

DTC Code DTC Name
P0841 Transmission Fluid Pressure Sensor/Switch "A" Circuit Range/Performance
P2829 Pressure Control Solenoid "K" Performance (Shift Solenoid Valve SLS)

DESCRIPTION

The ECM controls the secondary oil pressure calibration based on the secondary oil pressure signal detected by the oil pressure sensor.

DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P0841

  1. Oil pressure requested value is 0.5 MPa or less

  2. Oil pressure sensor output value is 3.0 MPa or more

  3. 3 seconds

  4. 1-trip detection logic

  • Oil pressure sensor

  • Continuously variable transaxle assembly

  • ECM
P2829

  1. The vehicle speed is constant at a speed of 65 km/ h (40 mph) or more and the target gear ratio is the lowest possible gear ratio.

  2. The actual gear ratio is higher than the target.

  3. 1 second

  4. 2 trip detection logic

  1. The vehicle is accelerating from a stop (before the vehicle speed exceeds 8 km/h (5 mph))

  2. The gear ratio is higher than the threshold.

  3. 0.2 seconds

  4. 2 trip detection logic

MONITOR DESCRIPTION

The ECM checks for belt clamping high-pressure or low-pressure errors. When a mechanical malfunction is detected at the belt clamping pressure liner solenoid SLS and at the oil pressure sensor, the ECM detects the problem, illuminates the MIL and stores the DTC.

PROCEDURE


  1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0841 AND P2829)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / DTC / Current or Pending.

    5. Read the DTCs using the tester.

      Result
      Result Proceed to
      Only P0841 and/or P2829 is output A
      P0841 and/or P2829 and other DTCs are output B

      Tech Tips

      If any other DTCs besides P0841 or P2829 are output, perform troubleshooting for those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. READ VALUE USING INTELLIGENT TESTER (A/T OIL PRESSURE)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

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

    5. In accordance with the display on the tester, read the Data List.

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      A/T Oil Pressure

      Secondary oil pressure value/

      min.: -64 MPa

      max.: 63.998 MPa

      Secondary oil pressure inspection (N position stall test)

      0.2 to 0.9 MPa

      		 -

      Secondary oil pressure inspection (D position stall test)

      4.4 to 6.4 MPa
      Result
      Result Proceed to
      Data display is not within Normal Condition range A
      Data display is within Normal Condition range B

    B

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here

    A

  3. REPLACE OIL PRESSURE SENSOR


    1. Replace the oil pressure sensor Click here.


    NEXT

  4. CLEAR DTC


    1. Clear the DTC Click here.


    NEXT

  5. PERFORM INITIALIZATION

    Note


    • Performing reset memory will clear the learned values of both the yaw rate sensor (deceleration sensor 0 point calibration) and CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, yaw rate sensor 0 point calibration and CVT oil pressure calibration when replacing any of the parts shown in the following table:

      Replaced Part

      • Continuously variable transaxle assembly

      • ECM

      • Skid control computer (w/o VSC)

      • Oil pressure sensor

      • Deceleration sensor (w/o VSC)

      • Airbag sensor assembly (Yaw rate sensor) (w/ VSC)

    • After performing reset memory, always perform yaw rate sensor (deceleration sensor 0 point) calibration first, and then CVT oil pressure calibration.

    • Always perform 0 point calibration with the vehicle on level ground.

    • Do not shake or vibrate the vehicle during 0 point calibration.


    1. Using the intelligent tester, perform reset memory, deceleration sensor 0 point calibration and CVT oil pressure calibration Click here.

    2. Check that no DTC is stored.


    NEXT

  6. CHECK DTC OUTPUT


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / DTC / Current or Pending.

    5. Read the DTCs using the tester.

      Result
      Result Proceed to
      P0841 and/or P2829 is output A
      DTC is not output B

    B

    END

    A

  7. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  8. PERFORM INITIALIZATION

    Note


    • Performing reset memory will clear the learned values of both the yaw rate sensor (deceleration sensor 0 point calibration) and CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, yaw rate sensor 0 point calibration and CVT oil pressure calibration when replacing any of the parts shown in the following table:

      Replaced Part

      • Continuously variable transaxle assembly

      • ECM

      • Skid control computer (w/o VSC)

      • Oil pressure sensor

      • Deceleration sensor (w/o VSC)

      • Airbag sensor assembly (Yaw rate sensor) (w/ VSC)

    • After performing reset memory, always perform yaw rate sensor (deceleration sensor 0 point) calibration first, and then CVT oil pressure calibration.

    • Always perform 0 point calibration with the vehicle on level ground.

    • Do not shake or vibrate the vehicle during 0 point calibration.


    1. Using the intelligent tester, perform reset memory, deceleration sensor 0 point calibration and CVT oil pressure calibration Click here.

    2. Check that no DTC is stored.


    NEXT

  9. CHECK DTC OUTPUT


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / DTC / Current or Pending.

    5. Read the DTCs using the tester.

      Result
      Result Proceed to
      P0841 and/or P2829 is output A
      DTC is not output B

    B

    END

    A

  10. REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY


    1. Replace the continuously variable transaxle assembly Click here.


    NEXT

  11. CLEAR DTC


    1. Clear the DTC Click here.


    NEXT

  12. PERFORM INITIALIZATION

    Note


    • Performing reset memory will clear the learned values of both the yaw rate sensor (deceleration sensor 0 point calibration) and CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, yaw rate sensor 0 point calibration and CVT oil pressure calibration when replacing any of the parts shown in the following table:

      Replaced Part

      • Continuously variable transaxle assembly

      • ECM

      • Skid control computer (w/o VSC)

      • Oil pressure sensor

      • Deceleration sensor (w/o VSC)

      • Airbag sensor assembly (Yaw rate sensor) (w/ VSC)

    • After performing reset memory, always perform yaw rate sensor (deceleration sensor 0 point) calibration first, and then CVT oil pressure calibration.

    • Always perform 0 point calibration with the vehicle on level ground.

    • Do not shake or vibrate the vehicle during 0 point calibration.


    1. Using the intelligent tester, perform reset memory, deceleration sensor 0 point calibration and CVT oil pressure calibration Click here.

    2. Check that no DTC is stored.


    NEXT

    END