AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P2759

DTC Code DTC Name
P2759 Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU)

DESCRIPTION

The amount of current flow to the solenoid is controlled by the duty ratio* of the ECM output signal. The higher the duty ratio becomes, the higher the lock-up hydraulic pressure becomes during the lock-up operation.

A01J7B9E01

*: The duty ratio is the ratio of the current ON time (A) to the total of the current ON and OFF times (A + B).

Duty Ratio (%) = A / (A + B) x 100

DTC No. DTC Detection Condition Trouble Area
P2759 Open or short is detected in shift solenoid valve SLU circuit for 1 second or more while driving (1 trip detection logic)

  • Open or short in shift solenoid valve SLU circuit

  • Shift solenoid valve SLU

  • ECM

MONITOR DESCRIPTION

When an open or short in a shift solenoid valve SLU circuit is detected, the ECM determines that there is a malfunction. The ECM will illuminate the MIL and store this DTC.

WIRING DIAGRAM

A01J6WFE05

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SLU)


    1. A01J5I5E29

      Disconnect the E1 wire connector.

    2. Measure the resistance of the wire connector.

      Standard resistance
      Tester Connection Condition Specified Condition
      13 (SLU+) - 5 (SLU-) 20°C (68°F) 5.0 to 5.6 Ω
      13 (SLU+) - Body ground 20°C (68°F) 10 kΩ or higher
      5 (SLU-) - Body ground 20°C (68°F) 10 kΩ or higher

    NG

    INSPECT SHIFT SOLENOID VALVE SLU Click here

    OK

  2. CHECK WIRE HARNESS (TRANSMISSION WIRE - ECM)


    1. A01J5CJE09

      Disconnect the E16 ECM connector.

    2. Measure the resistance of the wire harness side connector.

      Standard resistance
      Tester Connection Condition Specified Condition
      E16-15 (SLU+) - E16-14 (SLU-) 20°C (68°F) 5.0 to 5.6 Ω
      E16-15 (SLU+) - Body ground 20°C (68°F) 10 kΩ or higher
      E16-14 (SLU-) - Body ground 20°C (68°F) 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

    REPLACE ECM

  3. INSPECT SHIFT SOLENOID VALVE SLU


    1. A01J6TKE16

      Remove the shift solenoid valve SLU.

    2. Measure the resistance of the solenoid valve.

      Standard resistance
      5.0 to 5.6 Ωat 20°C (68°F)

    3. Connect the positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.

    4. Check the operating noise of terminal 1 of the solenoid valve.

      OK
      Solenoid makes operating noise.

      Tech Tips

      Reference: Inspect using an oscilloscope.

      A01J4ENE04

      Check the waveform of the ECM connector.

      OK
      Refer to illustration.
      Item Content
      Tester Connection E16-15 (SLU+) - E16-14 (SLU-)
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition 4th (lock-up) or 5th (lock-up) gear

    NG

    REPLACE SHIFT SOLENOID VALVE SLU

    OK

    REPAIR OR REPLACE TRANSMISSION WIRE