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 ECM. During the lock-up operation, if the current increases, the lock-up hydraulic pressure increases.

A01FGO4E01
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 there is a malfunction. The ECM will turn on the MIL and store this DTC.

WIRING DIAGRAM

A01FG9QE04

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT TRANSMISSION WIRE (SLU)


    1. A01FEYSE50
      Text in Illustration
      *1

      Component without harness connected

      (Transmission Wire)

      Disconnect the transmission wire connector from the transmission.

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

      Standard resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      12 (SLU+) - 4 (SLU-) 5.0 to 5.6 Ω

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

      Standard resistance (Check for short)
      Tester Connection Specified Condition
      12 (SLU+) - Body ground 10 kΩ or higher
      4 (SLU-) - Body ground ↑

    NG

    Click here

    OK

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


    1. A01FG3YE02
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to ECM)

      Connect the transmission wire connector to the transmission.

    2. Disconnect the ECM connector.

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

      Standard resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      F3-3 (SLU+) - F3-2 (SLU-) 5.0 to 5.6 Ω

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

      Standard resistance (Check for short)
      Tester Connection Specified Condition
      F3-3 (SLU+) - Body ground 10 kΩ or higher
      F3-2 (SLU-) - Body ground ↑

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here

  3. INSPECT SHIFT SOLENOID VALVE SLU


    1. A01FDHVE09
      Text in Illustration
      *1 Shift Solenoid Valve SLU

      Remove the shift solenoid valve SLU.

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

      Standard resistance
      Tester Connection

      Specified Condition

      20°C (68°F)
      1 - 2 5.0 to 5.6 Ω

    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.

      OK
      The solenoid makes an operating sound.

    NG

    REPLACE SHIFT SOLENOID VALVE SLU Click here

    OK

    REPAIR OR REPLACE TRANSMISSION WIRE Click here