AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P074015

DTC Code DTC Name
P074015 Torque Converter Clutch Circuit Short to Battery or Open

DESCRIPTION

The shift solenoid valve SL 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. DTC Detection Condition Trouble Area
P074015

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


  1. Lock-up is operating.

  2. An open in the shift solenoid valve SL circuit is detected.

  3. Malfunction status occurs 1 time or more

  4. 2-trip detection logic

  • Wiring harness connector

  • Open in shift solenoid valve SL circuit

  • Shift solenoid valve SL

  • ECM

Fail-safe function:

If the ECM detects a malfunction, it turns shift solenoid valve SL 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 the shift solenoid valve SL to regulate the hydraulic pressure and provide smoother torque converter clutch engagement. The shift solenoid valve SL 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 shift solenoid valve SL circuit, it will illuminate the MIL and store a DTC.

WIRING DIAGRAM

Refer to DTC P074011 Click here.

CAUTION / NOTICE / HINT

Note

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

Tech Tips

After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Perform the Lock-up Function inspection in Road Test Click here.

  2. Turn the engine switch off.

  3. Perform step (1) again.

  4. Check for DTCs again Click here.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (SHIFT SOLENOID VALVE SL CIRCUIT)


    1. Disconnect the D87 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D87-75 (SL) - Body ground 20°C (68°F) 11 to 15 Ω

    OK

    REPLACE ECM Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (ECM - WIRING HARNESS CONNECTOR)


    1. Disconnect the D7 connector from the wiring harness connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D87-75 (SL) - D7-6 (SL) Always Below 1 Ω
      D87-75 (SL) - Other terminals Always 10 kΩ or higher
      D7-6 (SL) - Other terminals Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL)


    1. A01W5OIE02
      Text in Illustration
      *a

      Component without harness connected

      (Transmission Wire)

      Remove the wiring harness connector.

    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

    OK

    REPLACE WIRING HARNESS CONNECTOR Click here

    NG

  4. INSPECT SHIFT SOLENOID VALVE SL


    1. A01W4V8E02
      Text in Illustration
      *1 Shift Solenoid Valve SL

      Remove the shift solenoid valve SL.

    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

    OK

    REPLACE TRANSMISSION WIRE Click here

    NG

    REPLACE SHIFT SOLENOID VALVE SL Click here