AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P074011

DTC Code DTC Name
P074011 Torque Converter Clutch Circuit Short to Ground

DESCRIPTION

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 Note
P074011 Torque Converter Clutch Circuit Short to Ground While the vehicle is being driven so that lock-up is not requested, a short to ground is detected in the solenoid (SL) valve circuit (2-trip detection logic).

  • Solenoid (SL) valve

  • Transmission wire

  • Harness and connector

  • ECM

 Comes on DTC stored

SAE Code:

P2769

Fail-safe function:

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

MONITOR DESCRIPTION

Based on the signals from the throttle position sensor, the air flow meter and the crankshaft position sensor, the ECM sends a signal to solenoid (SL) valve to regulate the hydraulic pressure and provide smoother torque converter engagement. 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 a short to ground in the solenoid (SL) valve circuit, it will illuminate the MIL and store the DTC.

CONFIRMATION DRIVING PATTERN

CAUTION:

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

Tech Tips

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 engine switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the engine switch off and wait for 2 minutes or more.

  5. Turn the engine switch on (IG) and turn the GTS on.

  6. Start the engine.

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

    Click here

  8. Stop the vehicle.

  9. Enter the following menus: Powertrain / Transmission / Utility / All Readiness.

  10. Input the DTC: P074011.

  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

    Tech Tips


    • 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.

WIRING DIAGRAM

B006KZYE08
*1 Solenoid (SL) Valve
*2 Transmission Wire

CAUTION / NOTICE / HINT

Note

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

Click here

PROCEDURE


  1. INSPECT TRANSMISSION WIRE (SOLENOID (SL) VALVE)


    1. B006OYJC02
      *a

      Component without harness connected

      (Transmission Wire)

      Disconnect the D75 transmission wire connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      13 (SL) - Body ground 20°C (68°F) 11 to 15 Ω

    3. Connect the D75 transmission wire connector.

      Result
      Proceed to
      OK
      NG

    NG

    INSPECT SOLENOID (SL) VALVE Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)


    1. Disconnect the D110 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D110-62 (SL) - Body ground 20°C (68°F) 11 to 15 Ω
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  3. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM REGISTRATION Click here

  4. INSPECT SOLENOID (SL) VALVE


    1. B006QMTC01
      *1 Solenoid (SL) Valve

      Remove the solenoid (SL) valve.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Solenoid (SL) valve connector terminal - Solenoid (SL) valve body 20°C (68°F) 11 to 15 Ω

    3. Connect a positive (+) lead from the battery to the terminal of the solenoid valve connector, and a negative (-) lead to the solenoid body. Check that the valve moves and makes an operating sound.

      OK
      Valve moves and makes an operating sound.
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE TRANSMISSION WIRE Click here

    NG

    REPLACE SOLENOID (SL) VALVE Click here