DTC P2759 Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU): Wiring Diagram

WARNING: This page is about a different car, the 2006 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Wiring Diagram - Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT TRANSMISSION WIRE (SLU)

Disconnect the transmission wire connector from the transmission.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

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

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

Fig 2: Inspecting Transmission Wire (SLU)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
12 (SLU+) - Body ground	10 kΩ or higher
4 (SLU-) - Body ground

NG : Go to step 3

OK : GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

Connect the transmission wire connector to the transmission.
Disconnect the ECM connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition 20°C (68°F)
E4-13 (SLU+) - E4-12 (SLU-)	5.0 to 5.6 Ω

Fig 3: Identifying ECM E4 Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E4-13 (SLU+) - Body ground	10 kΩ or higher
E4-12 (SLU-) - Body ground

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : REPLACE ECM

INSPECT SHIFT SOLENOID VALVE SLU

Remove the shift solenoid valve SLU.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

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

Fig 4: Inspecting Shift Solenoid Valve Slu

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

OK : REPAIR OR REPLACE TRANSMISSION WIRE