Toyota Tundra. Manual — part 2816

When both conditions below are met: OFF malfunction (A) and (B)

OFF malfunction (A)

TYPICAL MALFUNCTION THRESHOLDS TABLE

OFF malfunction (B)

TYPICAL MALFUNCTION THRESHOLDS TABLE

[ON malfunction]

When both conditions below are met: ON malfunction (A) and (B)

ON malfunction (A)

TYPICAL MALFUNCTION THRESHOLDS TABLE

ON malfunction (B)

TYPICAL MALFUNCTION THRESHOLDS TABLE

INSPECTION PROCEDURE

1. ACTIVE TEST

HINT:

Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be
operated without removing any parts. This non-intrusive functional inspection can be very useful because
intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests
early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while
performing Active Tests.

a. Warm up the engine.

b. Turn the ignition switch off.

c. Connect the Techstream to the DLC3.

d. Turn the ignition switch to ON.

e. Turn the Techstream on.

f. Enter the following menus: Powertrain/Engine and ECT/Active Test.

g. According to the display on the Techstream, perform the Active Test.

Turbine speed/Output speed (NT/NO)

1.24 or more, and 1.49 or less (This means actual gear is 3rd)

Turbine speed/Output speed (NT/NO)

0.66 or more, and 0.80 or less (This means actual gear is 5th)

Turbine speed/Output speed (NT/NO)

0.51 or more, and 0.65 or less (This means actual gear is 6th)

Turbine speed/Output speed (NT/NO)

0.51 or more, and 0.65 or less (This means actual gear is 6th)

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

HINT:

While driving, the shift position can be forcibly changed with the Techstream. Comparing the shift
position commanded by the Active Test with the actual shift position enables you to confirm the
problem (see FAIL-SAFE TABLE ).

Engine and ECT:

ACTIVE TEST TABLE

HINT:



This test can be conducted when the vehicle speed is 50 km/h (31 MPH) or less.



The 4th to 5th and 5th to 6th up-shifts must be performed with the accelerator pedal released.



The 6th to 5th and 5th to 4th down-shifts must be performed with the accelerator pedal
released.



Do not operate the accelerator pedal for at least 2 seconds after shifting and do not shift
successively.



The shift position commanded by the ECM is shown in the Data List display on the
Techstream.



The shift solenoid valve S2 turns ON/OFF normally when the shift lever is in the D position.

SHIFT SOLENOID VALVE S2 REFERENCE TABLE

1. CHECK DTC OUTPUT (IN ADDITION TO DTC P0756)

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch to ON.

c. Turn the Techstream on.

d. Enter the following menus: Powertrain/Engine and ECT/Trouble Codes.

e. Read the DTCs using the Techstream.

Result

Tester

Display

Test Part

Control Range

Diagnostic Note

Control the

Shift Position

Operate shift solenoid
valve and set each shift
position



Press "-->"
button: Shift
up



Press "<--"
button: Shift
down

Possible to check operation of shift
solenoid valves [Vehicle Condition] 50
km/h (31 MPH) or less

ECM gear shift command 1st 2nd 3rd 4th 5th 6th
Shift solenoid valve S2

ON ON OFF OFF OFF ON

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

RESULT REFERENCE TABLE

HINT:

If any other codes besides P0756 are output, perform troubleshooting for those DTCs first.

B: GO TO DTC TABLE (See DIAGNOSTIC TROUBLE CODE TABLE )

A: Go to next step.

2. INSPECT SHIFT SOLENOID VALVE S2

a. Remove shift solenoid valve S2.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

c. Connect the battery's positive (+) lead to the terminal of the solenoid valve connector, and the

negative (-) lead to the solenoid valve body. Then check that the valve moves and makes an
operating noise.

OK: Valve moves and makes an operating noise.

Result

Proceed to

Only P0756 is output

A

P0756 and other DTCs are output

B

Tester Connection

Condition

Specified

Condition

Shift solenoid valve S2 connector terminal - Shift solenoid valve
S2 body

20°C (68°

F)

11 to 15 ohms

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

Fig. 58: Identifying Shift Solenoid Valve S2
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE SHIFT SOLENOID VALVE S2 (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: REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY (See REMOVAL )

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

DTC P0761: SHIFT SOLENOID "C" PERFORMANCE (SHIFT SOLENOID VALVE S3)

DESCRIPTION

The ECM uses signals from the output shaft speed sensor and input speed sensor to detect the actual gear
position (1st, 2nd, 3rd, 4th, 5th or 6th gear).

Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical
problems of the shift solenoid valves, valve body or automatic transmission (clutch, brake, gear, etc.).

DTC DETECTION CONDITION TABLE

DTC

Code

DTC Detection Condition

Trouble Area

P0761

S3 stuck ON malfunction*1:
When the ECM directs the gearshift to switch to 5th or 6th
gear, the engine overruns (clutch slips).
The ECM determines there is a malfunction when either of
the following conditions is met. (2-trip detection logic)

a. When the ECM directs the transmission to switch to

4th gear, the actual gear is shifted to 3rd.

b. When the ECM directs the transmission to switch to

5th gear, the engine overruns (clutch slips).



Shift solenoid valve S3
remains open



Shift solenoid valve SLT
remains open or closed



Valve body is blocked



Automatic transmission
(clutch, brake, gear, etc.)

P0761

S3 stuck OFF malfunction*2:
Shifting to 1st, 2nd, and 3rd gears is impossible.
The ECM determines there is a malfunction when the
following conditions are both met. (2-trip detection logic)

a. When the ECM directs the transmission to switch to

2nd gear, the actual gear is shifted to 4th.



Shift solenoid valve S3
remains closed



Valve body is blocked



Automatic transmission
(clutch, brake, gear, etc.)

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra