Dtc P2759 Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve Slu)


DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SLU)

CHECK WIRE HARNESS (TRANSMISSION WIRE - ECM)

INSPECT SHIFT SOLENOID VALVE SLU

DTC 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.
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750E Automatic Transmission.Automatic Transmission System. Dtc P2759 Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve Slu)
*: The duty ratio is the ratio of the current ON time (A) to the total of the current ON and OFF time (A + B).
Duty Ratio (%) = A / (A + B) x 100

DTC Code
DTC Detection Condition
Trouble Area
P2759
Open or short is detected in shift solenoid valve SLU circuit for 1 sec. or more while driving (1 trip detection logic)
  1. Open or short in shift solenoid valve SLU circuit
  2. Shift solenoid valve SLU
  3. 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


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750E Automatic Transmission.Automatic Transmission System. Dtc P2759 Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve Slu)


INSPECTION PROCEDURE

1.INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SLU)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750E Automatic Transmission.Automatic Transmission System. Dtc P2759 Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve Slu)

  1. Disconnect the E1 wire connector.

  1. 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
    		Always
    		1 MΩ or higher
    5 (SLU-) - Body ground
    		Always
    		1 MΩ or higher


NG
Go to step 3
OK


2.CHECK WIRE HARNESS (TRANSMISSION WIRE - ECM)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750E Automatic Transmission.Automatic Transmission System. Dtc P2759 Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve Slu)

  1. Disconnect the E16 ECM connector.

  1. 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
    		Always
    		1 MΩ or higher
    E16-14 (SLU-) - Body ground
    		Always
    		1 MΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM

3.INSPECT SHIFT SOLENOID VALVE SLU
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750E Automatic Transmission.Automatic Transmission System. Dtc P2759 Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve Slu)

  1. Remove the shift solenoid valve SLU.

  1. Measure the resistance of the solenoid valve.

    Standard resistance:
    5.0 to 5.6 Ω at 20°C (68°F)


  1. Connect the battery's positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector. Then check that the valve moves and makes an operating noise.

    OK:
    Valve moves and makes operating noise.

    HINT:
    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A750E Automatic Transmission.Automatic Transmission System. Dtc P2759 Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve Slu)
    Reference: Inspect using an oscilloscope.
    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