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 shift solenoid valve SLU is controlled by the TCM. During the lock-up operation, if the current increases, the lock-up hydraulic pressure increases.

A01L8YRE09
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P2759 Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU) Open or short is detected in the 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

  • TCM

 - DTC stored

MONITOR DESCRIPTION

When an open or short in the shift solenoid valve SLU circuit is detected, the TCM determines there is a malfunction. The TCM stores the DTC.

WIRING DIAGRAM

A01L8ALE35
*a Shift Solenoid Valve SLU
*b Transmission Wire

CAUTION / NOTICE / HINT

Note

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

Click here

Tech Tips

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


  1. Perform the Lock-up Function in Road Test.

    Click here

  2. Check for DTCs again.

    Click here

PROCEDURE


  1. INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SLU)


    1. A01LA0PC57
      *a

      Component without harness connected

      (Transmission Wire)

      Disconnect the transmission wire connector.

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

      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 Always 10 kΩ or higher
      5 (SLU-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT SHIFT SOLENOID VALVE SLU Click here

    OK

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


    1. A01LG7WC12
      *a

      Rear view of wire harness connector

      (to TCM)

      Disconnect the TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C77-22 (SLU+) - C77-21 (SLU-) 20°C (68°F) 5.0 to 5.6 Ω
      C77-22 (SLU+) - Body ground Always 10 kΩ or higher
      C77-21 (SLU-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TCM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. INSPECT SHIFT SOLENOID VALVE SLU


    1. A01SC0UC31
      *a

      Component without harness connected

      (Shift Solenoid Valve SLU)

      Remove shift solenoid valve SLU.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 5.0 to 5.6 Ω

    3. Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.

      OK
      Measurement Condition Specified Condition

      • Battery positive (+) with a 21 W bulb → Terminal 2

      • Battery negative (-) → Terminal 1

      		 Valve moves and makes an operating noise
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE TRANSMISSION WIRE Click here

    NG

    REPLACE SHIFT SOLENOID VALVE SLU Click here