Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GYSV
Model Year Start: 2020 Model: Corolla Hatchback Prod Date Range: [01/2019 - 11/2022]
Title: K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P2769,P2770; Torque Converter Clutch Solenoid Circuit Low (Shift Solenoid Valve SL); 2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022]

DTC

P2769

Torque Converter Clutch Solenoid Circuit Low (Shift Solenoid Valve SL)

DTC

P2770

Torque Converter Clutch Solenoid Circuit High (Shift Solenoid Valve SL)

DESCRIPTION

Based on the signal received by the shift solenoid valve SL, the ECM uses the shift solenoid valve SLU to control the lock-up clutch pressure.

If there is an open or short in the shift solenoid valve SL circuit, the ECM stops sending current to the malfunctioning shift solenoid valve.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P2769

Torque Converter Clutch Solenoid Circuit Low (Shift Solenoid Valve SL)

When the shift solenoid valve SL is operated, a short is detected in the shift solenoid valve SL circuit (1-trip detection logic).

  • Wire harness or connector
  • Continuously variable transaxle assembly (Shift solenoid valve SL)
  • ECM

Comes on

DTC stored

P2770

Torque Converter Clutch Solenoid Circuit High (Shift Solenoid Valve SL)

When the shift solenoid valve SL is not operated, an open or short to +B is detected in the shift solenoid valve SL circuit (1-trip detection logic).

  • Wire harness or connector
  • Continuously variable transaxle assembly (Shift solenoid valve SL)
  • ECM

Comes on

DTC stored

MONITOR DESCRIPTION

These DTCs indicate an open or short in the shift solenoid valve SL circuit. If there is an open or short in the shift solenoid valve SL circuit, the ECM detects the malfunction, illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs

P2769: Torque converter clutch solenoid (Shift solenoid valve SL) / Range check

P2770: Torque converter clutch solenoid (Shift solenoid valve SL) / Range check

Required sensors/Components

Continuously variable transaxle assembly

(Shift solenoid valve SL)

Frequency of operation

Continuous

Duration

1 time

MIL operation

Immediately

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not present

None

Battery voltage

8 V or more

Time after battery voltage is 8 V or more

0.5 seconds or more

Write inhibit

Permit

Time after write status forbiddance to permit

0.5 seconds or more

Ignition switch

ON

Time after ignition switch OFF to ON

0.5 seconds or more

Starter

OFF

Time after starter ON to OFF

0.5 seconds or more

TYPICAL MALFUNCTION THRESHOLDS

P2769:

All of the following conditions are met:

4 times or more

Command to solenoid

ON

Time after command to solenoid OFF to ON

0.008 seconds or more

Solenoid terminal voltage level (Shift solenoid valve SL)

Low

P2770:

All of the following conditions are met:

4 times or more

Command to solenoid

OFF

Time after command to solenoid ON to OFF

0.008 seconds or more

Solenoid terminal voltage level (Shift solenoid valve SL)

High

COMPONENT OPERATING RANGE

Shift solenoid valve SL

Resistance: 11 to 15 Ω at 20°C (68°F)

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. Drive the vehicle and confirm the lock-up on and off conditions according to 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: P2769 or P2770.
  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.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

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.

INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL)

(a) Disconnect the C60 transmission wire connector.

*a

Component without harness connected

(Transmission Wire)

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 (SL) - Body ground

20°C (68°F)

11 to 15 Ω

(c) Connect the C60 transmission wire connector.

NG

GO TO STEP 4

OK

2.

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

(a) Disconnect the C77 ECM connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

C77-67 (SL) - Body ground

20°C (68°F)

11 to 15 Ω

(c) Connect the C77 ECM connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM)

OK

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 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