Toyota Tundra. Manual — part 2841

Fig. 112: Identifying Shift Solenoid Valve SLU
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE SHIFT SOLENOID VALVE SLU (See DISASSEMBLY )

OK: Go to next step.

3. INSPECT TRANSMISSION VALVE BODY ASSEMBLY

a. Check the transmission valve body assembly (see REMOVAL ).

OK: There are no foreign objects on any valve.

NG: REPLACE TRANSMISSION VALVE BODY ASSEMBLY (See REMOVAL )

OK: Go to next step.

4. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

a. Check the torque converter clutch assembly (see INSPECTION ).

OK: The torque converter clutch operates normally.

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

NG: REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY (See REMOVAL )

OK: REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY (See REMOVAL )

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. During the
lock-up operation, if the duty ratio increases, the lock-up hydraulic pressure increases.

Fig. 113: Identifying Shift Solenoid Valve SLU
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

*: 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 DETECTION CONDITION TABLE

Reference: Inspect using an oscilloscope.

Check the waveform of the ECM connector.

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)



Open or short in shift
solenoid valve SLU circuit



Shift solenoid valve SLU



ECM

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

Standard

WAVEFORM REFERENCE TABLE

Fig. 114: Identifying Waveform
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

MONITOR DESCRIPTION

When an open or short in the 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.

MONITOR STRATEGY

MONITOR STRATEGY TABLE

TYPICAL ENABLING CONDITIONS

All

TYPICAL ENABLING CONDITIONS TABLE

Terminal No. (Symbol)

Tool Setting

Condition

Specified

Condition

D74-10 (SLU+) - D74-11
(SLU-)

5 V/DIV., 1 msec./

DIV.

5th (lock-up) or 6th (lock-up)
gear

Refer to Fig. 114

Related DTCs

P2759: Shift solenoid valve SLU/Range check

Required sensors/Components

Shift solenoid valve SLU

Frequency of operation

Continuous

Duration

1 sec.

MIL operation

Immediately

Sequence of operation

None

The monitor will run whenever the following DTCs
are not stored

None

Ignition switch

ON

Starter

OFF

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

Condition (A)

TYPICAL ENABLING CONDITIONS TABLE

Condition (B)

TYPICAL ENABLING CONDITIONS TABLE

TYPICAL MALFUNCTION THRESHOLDS

When either condition below is met: Condition (A) or (B)

Condition (A)

TYPICAL MALFUNCTION THRESHOLDS TABLE

Condition (B)

TYPICAL MALFUNCTION THRESHOLDS TABLE

COMPONENT OPERATING RANGE

COMPONENT OPERATING RANGE TABLE

WIRING DIAGRAM

Solenoid current cut status

Not cut

Battery voltage

11 V or higher

Target current

0.1 A or higher

Battery voltage

8 V or higher

Solenoid status from Hybrid IC

Failure

Hybrid IC status

Failure

Output signal duty

Less than 100%

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra