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 Code

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P0841

  1. The requested oil pressure value is 0.5 MPa or less.

  2. The oil pressure sensor output value is 3.0 MPa or higher.

  3. 3 seconds

  4. 2 trip detection logic

  • Oil pressure sensor

  • Continuously variable transaxle assembly

  • ECM
P2829

  1. The requested oil pressure value is 0.5 MPa or less.

  2. The oil pressure sensor output value is 3.0 MPa or higher.

  3. 3 seconds

  4. 2 trip detection logic

  1. The vehicle is driven at a speed of 8 km/h (5 mph) or less with the shift lever in D.

  2. The ratio of the rotation speeds of the primary pulley (NIN) and secondary pulley (NOUT) exceeds 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 shift solenoid valve SLS and at the oil pressure sensor, the ECM detects the problem, illuminates the MIL and stores the DTC.

PROCEDURE


  1. CHECK 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 intelligent tester on.

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

    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 intelligent 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.

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

      Secondary oil pressure value/

      min.: -0.625 MPa

      max.: 9.575 MPa

      Secondary oil pressure inspection


      • D position stall speed test: 3.39 to 4.60 MPa

      • R position stall speed test: 2.76 to 3.80 MPa

      		 -
      Result
      Result Proceed to
      Data displayed is not as specified under Normal Condition A
      Data displayed is as specified under Normal Condition B

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  3. REPLACE OIL PRESSURE SENSOR


    1. Replace the oil pressure sensor Click here.


    NEXT

  4. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  5. PERFORM INITIALIZATION

    Note


    • Performing reset memory will clear the learned values of both the yaw rate sensor assembly and deceleration sensor (deceleration sensor 0 point calibration) and CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, yaw rate sensor assembly and deceleration 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

      • Oil pressure sensor

      • Yaw rate sensor assembly (w/ VSC)

      • Deceleration sensor (w/o VSC)

      • Brake actuator assembly (skid control ECU)

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

    • Always perform 0 point calibration with the vehicle on level ground (Inclination: 0 +/-0.25°).

    • 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.


    NEXT

  6. CHECK DTC OUTPUT


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

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

    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 assembly and deceleration sensor (deceleration sensor 0 point calibration) and CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, yaw rate sensor assembly and deceleration 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

      • Oil pressure sensor

      • Yaw rate sensor assembly (w/ VSC)

      • Deceleration sensor (w/o VSC)

      • Brake actuator assembly (skid control ECU)

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

    • Always perform 0 point calibration with the vehicle on level ground (Inclination: 0 +/-0.25°).

    • 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.


    NEXT

  9. CHECK DTC OUTPUT


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

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

    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 DTCs 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

      • Oil pressure sensor

      • Yaw rate sensor

    • 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 (Inclination: 0 +/-0.25°).

    • 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