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AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P2769, P2770

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DTC Code DTC Name
P2769 Torque Converter Clutch Solenoid Circuit Low
P2770 Torque Converter Clutch Solenoid Circuit High
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DESCRIPTION

The solenoid (SL) valve is turned on and off by signals from the ECM to control the hydraulic pressure acting on the lock-up relay valve, which then controls operation of the lock-up clutch.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P2769 Torque Converter Clutch Solenoid Circuit Low While lock-up is operating, a short is detected in the solenoid (SL) valve circuit (2-trip detection logic).

  • Wiring harness connector

  • Short in solenoid (SL) valve circuit

  • Solenoid (SL) valve

  • Transmission wire

  • ECM

 Comes on DTC stored
P2770 Torque Converter Clutch Solenoid Circuit High While lock-up is operating, an open is detected in the solenoid (SL) valve circuit (2-trip detection logic).

  • Wiring harness connector

  • Open in solenoid (SL) valve circuit

  • Solenoid (SL) valve

  • Transmission wire

  • ECM

 Comes on DTC stored

Fail-safe function:

If the ECM detects a malfunction, it turns solenoid (SL) valve off.

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MONITOR DESCRIPTION

Based on the signals from the throttle position sensor, air flow meter and crankshaft position sensor, the ECM sends a signal to the solenoid (SL) valve to regulate the hydraulic pressure and provide smoother torque converter clutch engagement. The solenoid (SL) valve responds to commands from the ECM. The valve controls the lock-up relay valve to perform the torque converter lock-up function. If the ECM detects an open or short in the solenoid (SL) valve circuit, it will illuminate the MIL and store a DTC.

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CONFIRMATION DRIVING PATTERN

CAUTION:

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

Tip:

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.


  1. Connect the GTS to the DLC3.

  2. Turn the ignition switch to ON and turn the GTS 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 GTS on.

  6. Start the engine.

  7. Perform the Lock-up Function inspection in Road Test.

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  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.

    GTS 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
    Tip:

    • 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 Confirmation Driving Pattern and check the DTC judgment result again.

Table 1. *1 Solenoid (SL) Valve *2 Transmission Wire *3 Wiring Harness Connector
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

Perform registration and/or initialization when parts related to the automatic transaxle are replaced.

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PROCEDURE


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    CHECK HARNESS AND CONNECTOR (SOLENOID (SL) VALVE CIRCUIT)


    1. Disconnect the C58 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C58-40 (SL) - Body ground 20°C (68°F) 11 to 15 Ω
      Result
      Proceed to
      OK
      NG

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    CHECK HARNESS AND CONNECTOR (ECM - WIRING HARNESS CONNECTOR)


    1. Disconnect the C54 wiring harness connector connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C58-40 (SL) - C54-6 (SL) Always Below 1 Ω
      C58-40 (SL) or C54-6 (SL) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

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    INSPECT TRANSMISSION WIRE (SOLENOID (SL) VALVE)


    1. B006XMZC02
      *a

      Component without harness connected

      (Transmission Wire)

      Remove the wiring harness connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-6 (SL) - Body ground 20°C (68°F) 11 to 15 Ω
      Result
      Proceed to
      OK
      NG

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    INSPECT SOLENOID (SL) VALVE


    1. B006Z3IC02
      *1 Solenoid (SL) Valve

      Remove the solenoid (SL) valve.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Solenoid Connector (SL) - Solenoid Body (SL) 20°C (68°F) 11 to 15 Ω
      Result
      Proceed to
      OK
      NG