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

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

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

Fig 1: Lock-Up Hydraulic Pressure Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*: 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 DETECTION CONDITION AND TROUBLE AREA

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

Reference: Inspect using an oscilloscope.

Check the waveform of the ECM connector.

Standard voltage: Refer to Fig 2 .

ITEM AND CONTENT REFERENCE

Item	Content
Tester Connection	E6-15 (SLU+) - E6-14 (SLU-)
Tool Setting	5 V/DIV., 1 msec./DIV.
Condition	4th (lock-up) or 5th (lock-up) gear

Fig 2: Voltage Waveform Graph