Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000001GYSN
Model Year Start: 2020 Model: Corolla Hatchback Prod Date Range: [01/2019 - 11/2022]
Title: K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P0841,P2829; Transmission Fluid Pressure Sensor/Switch "A" Circuit Range/Performance; 2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022]

DTC

P0841

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

DTC

P2829

Pressure Control Solenoid "K" Performance or Stuck Off

DESCRIPTION

The ECM controls the secondary oil pressure based on the secondary oil pressure signal output 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

Either of the following conditions is met (1-trip detection logic):

  • When the requested oil pressure is less than 1.0 MPa (10.2 kgf/cm2, 145 psi), the oil pressure sensor output is 2.5 MPa (25.5 kgf/cm2, 363 psi) or more and the difference between the calculated primary pulley pressure and target primary pulley pressure is 2.0 MPa (20.4 kgf/cm2, 290 psi) or more for 3 seconds or more.
  • When the requested oil pressure is 1.4 MPa (14.3 kgf/cm2, 203 psi) or more, the oil pressure sensor output is less than 0.5 MPa (5.1 kgf/cm2, 73 psi) for 2 seconds or more.
  • Oil pressure sensor
  • ECM

Comes on

DTC stored

P2829

Pressure Control Solenoid "K" Performance or Stuck Off

Any of the following conditions are met (1-trip detection logic):

  • When the requested oil pressure is 1.4 MPa (14.3 kgf/cm2, 203 psi) or more, the oil pressure sensor output is less than 0.5 MPa (5.1 kgf/cm2, 73 psi) for 2 seconds or more.
  • When the vehicle speed is less than 8 km/h (5 mph), the actual gear ratio exceeds 4 or more for 0.2 seconds or more.
  • When the oil pressure sensor output is less than 0.35 MPa (3.6 kgf/cm2, 51 psi) and the target gear ratio is 2.0 or more, the actual gear ratio is less than 1.0 for 1.5 seconds or more.
  • When the requested oil pressure is 1.0 MPa (10.2 kgf/cm2, 145 psi) or less, the oil pressure sensor output is 2.5 MPa (25.5 kgf/cm2, 363 psi) or more and the difference between the calculated primary pulley pressure and target primary pulley pressure is 0.5 MPa (5.1 kgf/cm2, 73 psi) or more for 3 seconds or more.
  • Continuously variable transaxle assembly
  • ECM

Comes on

DTC stored

DTC Detection Condition Patterns (P0841):

 

Vehicle Condition

Pattern 1

Pattern 2

Diagnostic Condition

The requested oil pressure is less than 1.0 MPa (10.2 kgf/cm2, 145 psi).

-

The requested oil pressure value is 1.4 MPa (14.3 kgf/cm2, 203 psi) or more.

-

Malfunction Condition

The oil pressure sensor output is 2.5 MPa (25.5 kgf/cm2, 363 psi) or more.

-

The difference between the calculated primary pulley pressure and target primary pulley pressure is 2.0 MPa (20.4 kgf/cm2, 290 psi).

-

The oil pressure sensor output value is 0.5 MPa (5.1 kgf/cm2, 73 psi) or less.

-

Duration

3 seconds or more

2 seconds or more

Detection Logic

1-trip detection logic

1-trip detection logic

DTC Detection Condition Patterns (P2829):

 

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Pattern 4

Diagnostic Condition

The requested oil pressure is 1.4 MPa (14.3 kgf/cm2, 203 psi) or more.

-

-

-

The vehicle speed is less than 8 km/h (5 mph).

-

-

-

The oil pressure sensor output is less than 0.35 MPa (3.6 kgf/cm2, 51 psi).

-

-

-

The target gear ratio is 2.0 or more.

-

-

-

The requested oil pressure is 1.0 MPa (10.2 kgf/cm2, 145 psi) or less.

-

-

-

Malfunction Condition

The oil pressure sensor output is less than 0.5 MPa (5.1 kgf/cm2, 73 psi).

-

-

-

The actual gear ratio is 4 or more.

-

-

-

The actual gear ratio is less than 1.0.

-

-

-

The oil pressure sensor output is 2.5 MPa (25.5 kgf/cm2, 363 psi) or more.

-

-

-

The difference between the calculated primary pulley pressure and target primary pulley pressure is 0.5 MPa (5.1 kgf/cm2, 73 psi) or more.

-

-

-

Duration

2 seconds or more

0.2 seconds or more

1.5 seconds or more

3 seconds or more

Detection Logic

1-trip detection logic

1-trip detection logic

1-trip detection logic

1-trip detection logic

HINT:

These DTCs are output when either of the above detection patterns is met.

MONITOR DESCRIPTION

The ECM checks for belt clamping high-pressure or low-pressure malfunctions. If a mechanical malfunction of the shift solenoid valve SLS or the oil pressure sensor is detected by the ECM, it illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs

P0841: Oil pressure sensor / Rationality fault diagnostics

P2829: Belt clamping pressure liner solenoid (Shift solenoid valve SLS) / Functional check

Required sensors/Components

  • Oil pressure sensor
  • Continuously variable transaxle assembly (Shift solenoid valve SLS)

Frequency of operation

Continuous

Duration

P0841

  • ON malfunction: 3 seconds

    OFF malfunction: 2 seconds

P2829

  • ON malfunction (A): 2 seconds

    ON malfunction (B): 0.2 seconds

    ON malfunction (C): 1.5 seconds

    OFF malfunction: 3 seconds

MIL operation

1 driving cycle

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

All

Electric throttle control system (ETCS)

Not system down

(MIL illuminated by following codes: P0121, P0122, P0123, P0222, P0223, P0604, P0606, P0607, P060D, P060E, P0657, P0658, P1607, P16B0, P2102, P2103, P2111, P2112, P2119, P2135)

Knock sensor circuit

Not circuit malfunction

(MIL illuminated by following codes: P0327, P0328)

Engine coolant temperature (ECT) sensor circuit

Not circuit malfunction

(MIL illuminated by following codes: P0117, P0118)

Intake air temperature (IAT) sensor circuit

Not circuit malfunction

(MIL illuminated by following codes: P0112, P0113)

Pressure control solenoid "K" circuit

(Shift solenoid valve SLS circuit)

Not circuit malfunction

(MIL illuminated by following codes: P282F, P2830)

Transmission fluid pressure sensor "A" circuit

(CVT fluid pressure sensor circuit)

Not circuit malfunction

(MIL illuminated by following codes: P0842, P0843)

Shift position

"D" or "R" or "B"

Ignition switch

ON

Low voltage flag

OFF

P0841:

  • All

    Transmission fluid temperature sensor "A" circuit

    (CVT fluid temperature sensor circuit)

    Not circuit malfunction

    (MIL illuminated by following codes: P0712, P0713)

    Crankshaft position sensor "A" circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P0335, P0337, P0338)

    Time after following condition is met:

    0.5 seconds or more

    - Variation of the accelerator pedal angle

    Less than 0.5% per 32 msec.

    Shift solenoid valve SLS

    Operating clamping pressure control by ECM command

    ON malfunction (A)

    Duration time after shifting from ("N" or "P") to ("D" or "R" or "B")

    4 seconds or more

    Engine speed

    800 rpm or more

    Transmission fluid temperature

    -10°C (14°F) or more

    ECT (Engine coolant temperature)

    60°C (140°F) or more

    Spark advance from MAX. retard timing by KCS control

    0°CA or more

    ON malfunction (B)

    Shift solenoid "G" circuit

    (Shift solenoid valve SC)

    Not circuit malfunction

    (MIL illuminated by following codes: P099B, P099C)

    Torque converter clutch solenoid circuit

    (Shift solenoid valve SL circuit)

    Not circuit malfunction

    (MIL illuminated by following codes: P2769, P2770)

    Pressure control solenoid "J" circuit

    (Shift solenoid valve SLP circuit)

    Not circuit malfunction

    (MIL illuminated by following codes: P2826, P2827)

    Turbine speed sensor "A" circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P0717, P07BF, P07C0)

    Input speed sensor "B" circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P2767)

    Output speed sensor circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P0722, P077C, P077D)

    Tire

    Not slipping

    Turbine speed - Input speed

    Less than 50 rpm

    ECT (Engine coolant temperature)

    60°C (140°F) or more

    Spark advance from MAX. retard timing by KCS control

    0°CA or more

    Engine speed

    800 rpm or more

    Input speed

    100 rpm or more

    Output speed

    1000 rpm or more

    Transmission fluid temperature

    -10°C (14°F) or more and less than 140°C (284°F)

    Duration time after shifting from ("N" or "P") to ("D" or "R" or "B")

    4 seconds or more

    All of the following conditions are met: (a) and (b)

    4.032 seconds or more

    (a) ECM does NOT command

    SC "ON"

    (b) ECM does NOT command

    SL "OFF"

    Actual gear ratio

    More than 0.3 and 2.2 or less

    Accelerator pedal

    ON

    Target clamping pressure

    Less than 1.0 MPa (10.2 kgf/cm2, 145 psi)

    Shift solenoid valve SLP

    Operating shift control by ECM command

    OFF malfunction

    Duration time after shifting from ("N" or "P") to ("D" or "R" or "B")

    4 seconds or more

    Spark advance from MAX. retard timing by KCS control

    0°CA or more

    Engine speed

    800 rpm or more

    Transmission fluid temperature

    -10°C (14°F) or more

    ECT (Engine coolant temperature)

    60°C (140°F) or more

P2829:

  • ON malfunction (A)

    Transmission fluid temperature sensor "A" circuit

    (CVT fluid temperature sensor circuit)

    Not circuit malfunction

    (MIL illuminated by following codes: P0712, P0713)

    Crankshaft position sensor "A" circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P0335, P0337, P0338)

    Duration time after shifting from ("N" or "P") to ("D" or "R" or "B")

    4 seconds or more

    Engine speed

    800 rpm or more

    Transmission fluid temperature

    -10°C (14°F) or more

    Time after following condition is met:

    0.5 seconds or more

    - Variation of the accelerator pedal angle

    Less than 0.5% per 32 msec.

    ECT (Engine coolant temperature)

    60°C (140°F) or more

    Spark advance from MAX. retard timing by KCS control

    0°CA or more

    Shift solenoid valve SLS

    Operating clamping pressure control by ECM command

    ON malfunction (B) 1st judgment:

    Shift solenoid "G" circuit

    (Shift solenoid valve SC)

    Not circuit malfunction

    (MIL illuminated by following codes: P099B, P099C)

    Torque converter clutch solenoid circuit

    (Shift solenoid valve SL circuit)

    Not circuit malfunction

    (MIL illuminated by following codes: P2769, P2770)

    Torque converter clutch pressure control solenoid circuit

    (Shift solenoid valve SLU circuit)

    Not circuit malfunction

    (MIL illuminated by following codes: P2763, P2764)

    Pressure control solenoid "J" circuit

    (Shift solenoid valve SLP circuit)

    Not circuit malfunction

    (MIL illuminated by following codes: P2826, P2827)

    Input speed sensor "B" circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P2767)

    Output speed sensor circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P0722, P077C, P077D)

    Crankshaft position sensor "A" circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P0335, P0337, P0338)

    Duration time after shifting from ("N" or "P") to ("D" or "R" or "B")

    4 seconds or more

    Transmission fluid temperature

    -10°C (14°F) or more

    ECT (Engine coolant temperature)

    60°C (140°F) or more

    Spark advance from MAX. retard timing by KCS control

    0°CA or more

    Engine speed

    800 rpm or more

    Input speed

    600 rpm or more

    Output speed

    150 rpm or more

    Vehicle speed

    Less than 8 km/h (5.0 mph)

    Brake pedal

    Released

    Tire

    Not slipping

    When the vehicle starts, the vehicle is on the flat surface *

    -

    Actual clamping pressure

    Less than 0.35 MPa (3.6 kgf/cm2, 51 psi)

    ON malfunction (B) 2nd judgment:

    Shift solenoid "G" circuit

    (Shift solenoid valve SC)

    Not circuit malfunction

    (MIL illuminated by following codes: P099B, P099C)

    Torque converter clutch solenoid circuit

    (Shift solenoid valve SL circuit)

    Not circuit malfunction

    (MIL illuminated by following codes: P2769, P2770)

    Torque converter clutch pressure control solenoid circuit

    (Shift solenoid valve SLU circuit)

    Not circuit malfunction

    (MIL illuminated by following codes: P2763, P2764)

    Pressure control solenoid "J" circuit

    (Shift solenoid valve SLP circuit)

    Not circuit malfunction

    (MIL illuminated by following codes: P2826, P2827)

    Input speed sensor "B" circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P2767)

    Output speed sensor circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P0722, P077C, P077D)

    Crankshaft position sensor "A" circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P0335, P0337, P0338)

    Duration time after shifting from ("N" or "P") to ("D" or "R" or "B")

    4 seconds or more

    Transmission fluid temperature

    -10°C (14°F) or more

    ECT (Engine coolant temperature)

    60°C (140°F) or more

    Spark advance from MAX. retard timing by KCS control

    0°CA or more

    Engine speed

    800 rpm or more

    Input speed

    600 rpm or more

    Output speed

    150 rpm or more

    Vehicle speed

    Less than 8 km/h (5.0 mph)

    Brake pedal

    Released

    Tire

    Not slipping

    When the vehicle starts, the vehicle is on the flat surface *

    -

    Actual clamping pressure

    Less than 0.35 MPa (3.6 kgf/cm2, 51 psi)

    Following condition are met once after 1st judgment: (a) or (b)

    -

    (a) Vehicle speed

    15 km/h (9.3 mph) or more

    (b) Vehicle speed

    Less than 2 km/h (1.2 mph)

    HINT:

    *: The vehicle is stopping and calculated road grade is less than 1.7 m/sec2

    ON malfunction (C)

    Shift solenoid "G" circuit

    (Shift solenoid valve SC)

    Not circuit malfunction

    (MIL illuminated by following codes: P099B, P099C)

    Torque converter clutch solenoid circuit

    (Shift solenoid valve SL circuit)

    Not circuit malfunction

    (MIL illuminated by following codes: P2769, P2770)

    Pressure control solenoid "J" circuit

    (Shift solenoid valve SLP circuit)

    Not circuit malfunction

    (MIL illuminated by following codes: P2826, P2827)

    Transmission fluid temperature sensor "A" circuit

    (CVT fluid temperature sensor circuit)

    Not circuit malfunction

    (MIL illuminated by following codes: P0712, P0713)

    Turbine speed sensor "A" circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P0717, P07BF, P07C0)

    Input speed sensor "B" circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P2767)

    Output speed sensor circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P0722, P077C, P077D)

    Tire

    Not slipping

    Turbine speed - Input speed

    Less than 50 rpm

    ECT (Engine coolant temperature)

    60°C (140°F) or more

    Spark advance from MAX. retard timing by KCS control

    0°CA or more

    Engine speed

    500 rpm or more

    Input speed

    100 rpm or more

    Output speed

    150 rpm or more

    Transmission fluid temperature

    -10°C (14°F) or more and less than 140°C (284°F)

    Duration time after shifting from ("N" or "P") to ("D" or "R" or "B")

    4 seconds or more

    All of the following conditions are met: (a) and (b)

    4.032 seconds or more

    (a) ECM does NOT command

    SC "ON"

    (b) ECM does NOT command

    SL "OFF"

    Shift solenoid valve SLP

    Operating shift control by ECM command

    Target clamping pressure

    0.75 MPa (7.6 kgf/cm2, 109 psi) or more

    Actual clamping pressure

    Less than 0.35 MPa (3.6 kgf/cm2, 51 psi)

    Time after some of the following conditions are met: (a) or (b)

    0.5 seconds or more

    (a) ECM commands

    SC "OFF" and SL "ON"

    (b) ECM commands

    SC "ON" and SL "ON"

    OFF malfunction (A)

    Crankshaft position sensor "A" circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P0335, P0337, P0338)

    Duration time after shifting from ("N" or "P") to ("D" or "R" or "B")

    4 seconds or more

    Engine speed

    800 rpm or more

    Transmission fluid temperature

    -10°C (14°F) or more

    Time after following condition is met:

    0.5 seconds or more

    - Variation of the accelerator pedal angle

    Less than 0.5% per 32 msec.

    Shift solenoid valve SLS

    Operating clamping pressure control by ECM command

    ECT (Engine coolant temperature)

    60°C (140°F) or more

    Spark advance from MAX. retard timing by KCS control

    0°CA or more

    OFF malfunction (B)

    Shift solenoid "G" circuit

    (Shift solenoid valve SC)

    Not circuit malfunction

    (MIL illuminated by following codes: P099B, P099C)

    Torque converter clutch solenoid circuit

    (Shift solenoid valve SL circuit)

    Not circuit malfunction

    (MIL illuminated by following codes: P2769, P2770)

    Pressure control solenoid "J" circuit

    (Shift solenoid valve SLP circuit)

    Not circuit malfunction

    (MIL illuminated by following codes: P2826, P2827)

    Transmission fluid temperature sensor "A" circuit

    (CVT fluid temperature sensor circuit)

    Not circuit malfunction

    (MIL illuminated by following codes: P0712, P0713)

    Turbine speed sensor "A" circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P0717, P07BF, P07C0)

    Input speed sensor "B" circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P2767)

    Output speed sensor circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P0722, P077C, P077D)

    Crankshaft position sensor "A" circuit

    Not circuit malfunction

    (MIL illuminated by following codes: P0335, P0337, P0338)

    Duration time after shifting from ("N" or "P") to ("D" or "R" or "B")

    4 seconds or more

    Engine speed

    800 rpm or more

    Time after following condition is met:

    0.5 seconds or more

    - Variation of the accelerator pedal angle

    Less than 0.5% per 32 msec.

    Shift solenoid valve SLS

    Operating clamping pressure control by ECM command

    ECT (Engine coolant temperature)

    60°C (140°F) or more

    Spark advance from MAX. retard timing by KCS control

    0°CA or more

    Tire

    Not slipping

    Turbine speed - Input speed

    Less than 50 rpm

    Input speed

    100 rpm or more

    Output speed

    1000 rpm or more

    Transmission fluid temperature

    -10°C (14°F) or more and less than 140°C (284°F)

    All of the following conditions are met: (a) and (b)

    4.032 seconds or more

    (a) ECM does NOT command

    SC "ON"

    (b) ECM does NOT command

    SL "OFF"

    Shift solenoid valve SLP

    Operating shift control by ECM command

    Actual gear ratio

    More than 0.3 and 2.2 or less

    Accelerator pedal

    ON

    Target clamping pressure

    Less than 1.0 MPa (10.2 kgf/cm2, 145 psi)

TYPICAL MALFUNCTION THRESHOLDS

P0841:

  • ON malfunction
    • Both of the following conditions are met: ON malfunction (A) and (B)

      ON malfunction (A)

      Target clamping pressure

      Less than 1.0 MPa (10.2 kgf/cm2, 145 psi)

      Actual clamping pressure

      2.5 MPa (25.5 kgf/cm2, 363 psi) or more

      ON malfunction (B)

      Calculated primary pulley pressure*1 - Target primary pulley pressure

      2.0 MPa (20.4 kgf/cm2, 290 psi) or more

      HINT:

      *1: Calculated primary pulley pressure is calculated by value of transmission fluid pressure sensor "A" and actual gear ratio

  • OFF malfunction

    Target clamping pressure

    1.4 MPa (14.3 kgf/cm2, 203 psi) or more

    Actual clamping pressure

    Less than 0.5 MPa (5.1 kgf/cm2, 73 psi)

P2829:

  • ON malfunction
    • Any of the following conditions are met: ON malfunction (A), (B) or (C)

      ON malfunction (A)

      Target clamping pressure

      1.4 MPa (14.3 kgf/cm2, 203 psi) or more

      Actual clamping pressure

      Less than 0.5 MPa (5.1 kgf/cm2, 73 psi)

      ON malfunction (B)

      Actual gear ratio*2

      4 or more

      ON malfunction (C)

      Target gear ratio

      2 or more

      Actual gear ratio

      Less than 1

      HINT:

      *2: It is necessary 2 judgments / drive cycle

      1st judgment: temporary flag "ON"

      2nd judgment: pending fault code ON

  • OFF malfunction
    • Both of the following conditions are met: OFF malfunction (A) and (B)

      OFF malfunction (A)

      Target clamping pressure

      Less than 1.0 MPa (10.2 kgf/cm2, 145 psi)

      Actual clamping pressure

      2.5 MPa (25.5 kgf/cm2, 363 psi) or more

      OFF malfunction (B)

      Calculated primary pulley pressure*3 - Target primary pulley pressure

      Less than 0.5 MPa (5.1 kgf/cm2, 73 psi)

      HINT:

      *3: Calculated primary pulley pressure is calculated by value of transmission fluid pressure sensor "A" and actual gear ratio

COMPONENT OPERATING RANGE

Secondary oil pressure value

0.1 to 5.0 MPa (1 to 51 kgf/cm2, 15 to 725 psi)

CONFIRMATION DRIVING PATTERN

CAUTION:

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

HINT:

  • After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
  • When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.

    Click here 2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022]; K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: DTC CHECK / CLEAR

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off and wait for 2 minutes or more.
  5. Turn the ignition switch to ON and turn the Techstream on.
  6. Start the engine.
  7. Perform the D Position Shift Test inspection in Road Test. [*1]

    Click here 2020 MY Corolla Corolla Hatchback [01/2019 - 03/2019]; K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: ROAD TEST 2020 - 2023 MY Corolla Corolla Hatchback [03/2019 - 11/2022]; K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: ROAD TEST

    HINT:

    [*1]: Normal judgment procedure.

    The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

  8. Stop the vehicle.
  9. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  10. Input the DTC: P0841 or P2829.
  11. Check the DTC judgment result.

    Techstream 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

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.

CAUTION / NOTICE / HINT

CAUTION:

  • Do not perform a stall test if there are any people or objects near the vehicle.
  • The vehicle could begin moving suddenly, resulting in a serious accident.
  • Do not perform a stall test if any wheel chocks are out of position.
  • The vehicle could begin moving suddenly, resulting in a serious accident.
  • Do not perform the stall test on a slippery or low-friction surface that could allow the tires to spin.
  • The vehicle could begin moving suddenly, resulting in a serious accident.

NOTICE:

  • Perform the universal trip to clear permanent DTCs.

    Click here 2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022]; K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: DTC CHECK / CLEAR

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

    Click here 2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022]; K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION

  • Check that no DTCs are stored after performing initialization.

    Click here 2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022]; K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: DTC CHECK / CLEAR

PROCEDURE

1.

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

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Powertrain > Engine and ECT > Trouble Codes

(e) Read the DTCs using the Techstream.

HINT:

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

Result

Proceed to

Both DTC P0841 and P2829 are output

A

Only DTC P0841 is output

B

Only DTC P2829 is output

C

DTC P0841 and/or P2829 and other DTCs are output

D

B

GO TO STEP 12

C

GO TO STEP 19

D

GO TO DTC CHART 2020 MY Corolla Corolla Hatchback [01/2019 - 03/2019]; K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2020 - 2023 MY Corolla Corolla Hatchback [03/2019 - 11/2022]; K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: DIAGNOSTIC TROUBLE CODE CHART

A

2.

READ VALUE USING TECHSTREAM (A/T OIL PRESSURE)

CAUTION:

A stall speed test should always be performed with at least 2 people. One person should observe the condition of the wheels and wheel chocks while the other is performing the test.

NOTICE:

  • This test must be performed after checking and confirming that the engine is normal.
  • Perform this test with the CVT fluid temperature between 50 and 100°C (122 and 212°F).
  • Perform this test with the air conditioning off.
  • Do not perform the stall speed test for more than 5 seconds
  • When performing the stall speed test repeatedly, wait for 15 seconds or more between tests.
  • w/ Electric Parking Brake System:

    Perform this test with the AUTO function (shift-linked function) of the electric parking brake system off.

(a) Warm up the engine.

(b) Fully apply the parking brake and chock all 4 wheels.

HINT:

w/ Electric Parking Brake System:

When the parking brake indicator (red) is illuminated after the electric parking brake switch (electric parking brake switch assembly) has been pulled to the lock side, the maximum amount of braking force is applied if the electric parking brake switch (electric parking brake switch assembly) is pulled to the lock side one more time.

(c) Connect the Techstream to the DLC3.

(d) Turn the ignition switch to ON.

(e) Turn the Techstream on.

(f) Enter the following menus: Powertrain / Engine and ECT / Active Test / Connect the TC and TE1.

Powertrain > Engine and ECT > Active Test

Active Test Display

Connect the TC and TE1

Data List Display

A/T Oil Pressure

(g) According to the display on the Techstream, perform the Active Test.

(h) According to the display on the Techstream, read the Data List.

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:

  • 3.6 to 4.8 MPa (36.7 to 48.9 kgf/cm2, 522 to 696 psi): D position stall test
  • 3.7 to 4.8 MPa (37.7 to 48.9 kgf/cm2, 537 to 696 psi): R position stall test

-

Result

Proceed to

Data List value is normal

A

Data List value is not normal

B

B

GO TO STEP 4

A

3.

REPLACE ECM

(a) Replace the ECM.

Click here 2020 - 2023 MY Corolla [01/2019 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): ECM: COMPONENTS

NEXT

PERFORM INITIALIZATION

4.

REPLACE OIL PRESSURE SENSOR

(a) Replace the oil pressure sensor.

Click here 2020 MY Corolla Corolla Hatchback [01/2019 - 03/2019]; K313 (CVT): OIL PRESSURE SENSOR: COMPONENTS 2020 - 2023 MY Corolla Corolla Hatchback [03/2019 - 11/2022]; K313 (CVT): OIL PRESSURE SENSOR: COMPONENTS

NEXT

5.

CLEAR DTC

(a) Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs

NEXT

6.

PERFORM INITIALIZATION

(a) Using the Techstream, perform Reset Memory, Deceleration Sensor Zero Point Calibration and CVT Oil Pressure Calibration.

Click here 2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022]; K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION

NEXT

7.

CHECK DTC OUTPUT

(a) Perform a road test.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Powertrain > Engine and ECT > Trouble Codes

(f) Read the DTCs using the Techstream.

Result

Proceed to

DTC P0841 and/or P2829 is output

A

DTCs are not output

B

B

END

A

8.

REPLACE ECM

(a) Replace the ECM.

Click here 2020 - 2023 MY Corolla [01/2019 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): ECM: COMPONENTS

NEXT

9.

PERFORM INITIALIZATION

(a) Using the Techstream, perform Reset Memory, Deceleration Sensor Zero Point Calibration and CVT Oil Pressure Calibration.

Click here 2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022]; K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION

NEXT

10.

CHECK DTC OUTPUT

(a) Perform a road test.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Powertrain > Engine and ECT > Trouble Codes

(f) Read the DTCs using the Techstream.

Result

Proceed to

DTC P2829 is output

A

DTCs are not output

B

B

END

A

11.

REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY

(a) Replace the continuously variable transaxle assembly.

Click here 2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022]; K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY: COMPONENTS

NEXT

PERFORM INITIALIZATION

12.

READ VALUE USING TECHSTREAM (A/T OIL PRESSURE)

CAUTION:

A stall speed test should always be performed with at least 2 people. One person should observe the condition of the wheels and wheel chocks while the other is performing the test.

NOTICE:

  • This test must be performed after checking and confirming that the engine is normal.
  • Perform this test with the CVT fluid temperature between 50 and 100°C (122 and 212°F).
  • Perform this test with the air conditioning off.
  • Do not perform the stall speed test for more than 5 seconds
  • When performing the stall speed test repeatedly, wait for 15 seconds or more between tests.
  • w/ Electric Parking Brake System:

    Perform this test with the AUTO function (shift-linked function) of the electric parking brake system off.

(a) Warm up the engine.

(b) Fully apply the parking brake and chock all 4 wheels.

HINT:

w/ Electric Parking Brake System:

When the parking brake indicator (red) is illuminated after the electric parking brake switch (electric parking brake switch assembly) has been pulled to the lock side, the maximum amount of braking force is applied if the electric parking brake switch (electric parking brake switch assembly) is pulled to the lock side one more time.

(c) Connect the Techstream to the DLC3.

(d) Turn the ignition switch to ON.

(e) Turn the Techstream on.

(f) Enter the following menus: Powertrain / Engine and ECT / Active Test / Connect the TC and TE1.

Powertrain > Engine and ECT > Active Test

Active Test Display

Connect the TC and TE1

Data List Display

A/T Oil Pressure

(g) According to the display on the Techstream, perform the Active Test.

(h) According to the display on the Techstream, read the Data List.

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:

  • 3.6 to 4.8 MPa (36.7 to 48.9 kgf/cm2, 522 to 696 psi): D position stall test
  • 3.7 to 4.8 MPa (37.7 to 48.9 kgf/cm2, 537 to 696 psi): R position stall test

-

Result

Proceed to

Data List value is normal

A

Data List value is not normal

B

B

GO TO STEP 14

A

13.

REPLACE ECM

(a) Replace the ECM.

Click here 2020 - 2023 MY Corolla [01/2019 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): ECM: COMPONENTS

NEXT

PERFORM INITIALIZATION

14.

REPLACE OIL PRESSURE SENSOR

(a) Replace the oil pressure sensor.

Click here 2020 MY Corolla Corolla Hatchback [01/2019 - 03/2019]; K313 (CVT): OIL PRESSURE SENSOR: COMPONENTS 2020 - 2023 MY Corolla Corolla Hatchback [03/2019 - 11/2022]; K313 (CVT): OIL PRESSURE SENSOR: COMPONENTS

NEXT

15.

CLEAR DTC

(a) Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs

NEXT

16.

PERFORM INITIALIZATION

(a) Using the Techstream, perform Reset Memory, Deceleration Sensor Zero Point Calibration and CVT Oil Pressure Calibration.

Click here 2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022]; K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION

NEXT

17.

CHECK DTC OUTPUT

(a) Perform a road test.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Powertrain > Engine and ECT > Trouble Codes

(f) Read the DTCs using the Techstream.

Result

Proceed to

DTC P0841 is output

A

DTCs are not output

B

B

END

A

18.

REPLACE ECM

(a) Replace the ECM.

Click here 2020 - 2023 MY Corolla [01/2019 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): ECM: COMPONENTS

NEXT

PERFORM INITIALIZATION

19.

READ VALUE USING TECHSTREAM (A/T OIL PRESSURE)

CAUTION:

A stall speed test should always be performed with at least 2 people. One person should observe the condition of the wheels and wheel chocks while the other is performing the test.

NOTICE:

  • This test must be performed after checking and confirming that the engine is normal.
  • Perform this test with the CVT fluid temperature between 50 and 100°C (122 and 212°F).
  • Perform this test with the air conditioning off.
  • Do not perform the stall speed test for more than 5 seconds
  • When performing the stall speed test repeatedly, wait for 15 seconds or more between tests.
  • w/ Electric Parking Brake System:

    Perform this test with the AUTO function (shift-linked function) of the electric parking brake system off.

(a) Warm up the engine.

(b) Fully apply the parking brake and chock all 4 wheels.

HINT:

w/ Electric Parking Brake System:

When the parking brake indicator (red) is illuminated after the electric parking brake switch (electric parking brake switch assembly) has been pulled to the lock side, the maximum amount of braking force is applied if the electric parking brake switch (electric parking brake switch assembly) is pulled to the lock side one more time.

(c) Connect the Techstream to the DLC3.

(d) Turn the ignition switch to ON.

(e) Turn the Techstream on.

(f) Enter the following menus: Powertrain / Engine and ECT / Active Test / Connect the TC and TE1.

Powertrain > Engine and ECT > Active Test

Active Test Display

Connect the TC and TE1

Data List Display

A/T Oil Pressure

(g) According to the display on the Techstream, perform the Active Test.

(h) According to the display on the Techstream, read the Data List.

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:

  • 3.6 to 4.8 MPa (36.7 to 48.9 kgf/cm2, 522 to 696 psi): D position stall test
  • 3.7 to 4.8 MPa (37.7 to 48.9 kgf/cm2, 537 to 696 psi): R position stall test

-

Result

Proceed to

Data List value is normal

A

Data List value is not normal

B

B

GO TO STEP 21

A

20.

REPLACE ECM

(a) Replace the ECM.

Click here 2020 - 2023 MY Corolla [01/2019 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): ECM: COMPONENTS

NEXT

PERFORM INITIALIZATION

21.

REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY

(a) Replace the continuously variable transaxle assembly.

Click here 2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022]; K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY: COMPONENTS

NEXT

PERFORM INITIALIZATION