CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM, Diagnostic DTC:P0841 and 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.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0841

Transmission Fluid Pressure Sensor/Switch "A" Circuit Range/Performance

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other

  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

Comes on

DTC stored

P2829

Pressure Control Solenoid "K" Performance (Shift Solenoid Valve SLS)

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other

  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. Shift lever in D, and driving at speed of 8 km/h (5 mph) or less.

  2. The ratio of the rotation speeds of the primary pulley (NIN) and secondary pulley (NOUT) exceeds the threshold.

  3. 0.2 second

  4. 2 trip detection logic

  • Oil pressure sensor

  • Continuously variable transaxle assembly

  • ECM

Comes on

DTC stored

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.

CAUTION / NOTICE / HINT

Note:

  • Perform initialization when parts related to the continuously variable transaxle are replaced.

    Click here

  • Check that no DTCs are stored after performing initialization.

    Click here

PROCEDURE

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

    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 and ECT / Trouble Codes.

      Powertrain > Engine and ECT > Trouble Codes

    5. Read the DTCs using the GTS.

      Result

      Proceed to

      Only P0841 and/or P2829 is output

      P0841 and/or P2829 and other DTCs are output
      Tip:

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

    P0841 and/or P2829 and other DTCs are output

    GO TO DTC CHART

    Click here

    Only P0841 and/or P2829 is output

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

    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 and ECT / Data List.

      Powertrain > Engine and ECT > Data List

      Tester Display

      A/T Oil Pressure

      Powertrain > Engine and ECT > 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

      • 3ZR-FAE:

      • D position stall speed test: 3.3 to 4.6 MPa

      • R position stall speed test: 3.0 to 3.7 MPa

      • 3ZR-FE:

      • D position stall speed test: 3.2 to 4.5 MPa

      • R position stall speed test: 3.0 to 3.5 MPa

      -

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

      Result

      Proceed to

      Data displayed is not as specified under Normal Condition

      Data displayed is as specified under Normal Condition
    Data displayed is as specified under Normal Condition

    CHECK FOR INTERMITTENT PROBLEMS

    Click here

    Data displayed is not as specified under Normal Condition

  3. REPLACE OIL PRESSURE SENSOR

    1. Replace the oil pressure sensor.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  4. CLEAR DTC

    1. Clear the DTCs.

      Click here

      Powertrain > Engine and ECT > Clear DTCs

    Result

    Proceed to

    NEXT
    NEXT

  5. PERFORM INITIALIZATION

    1. Using the GTS, perform reset memory, deceleration sensor zero point calibration and CVT oil pressure calibration.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  6. CHECK DTC OUTPUT

    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 and ECT / Trouble Codes.

      Powertrain > Engine and ECT > Trouble Codes

    5. Read the DTCs using the GTS.

      Result

      Proceed to

      P0841 and/or P2829 is output

      DTC is not output
    DTC is not output

    END

    P0841 and/or P2829 is output

  7. REPLACE ECM

    1. Replace the ECM.

    Result

    Proceed to

    NEXT
    NEXT

  8. PERFORM INITIALIZATION

    1. Using the GTS, perform reset memory, deceleration sensor zero point calibration and CVT oil pressure calibration.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  9. CHECK DTC OUTPUT

    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 and ECT / Trouble Codes.

      Powertrain > Engine and ECT > Trouble Codes

    5. Read the DTCs using the GTS.

      Result

      Proceed to

      P0841 and/or P2829 is output

      DTC is not output
    DTC is not output

    END

    P0841 and/or P2829 is output

  10. REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY

    1. Replace the continuously variable transaxle assembly.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  11. CLEAR DTC

    1. Clear the DTCs.

      Click here

      Powertrain > Engine and ECT > Clear DTCs

    Result

    Proceed to

    NEXT
    NEXT

    PERFORM INITIALIZATION

    Click here