Toyota Tundra. Manual — part 681

Fig. 527: Identifying Front Power Seat Motor Assembly Components With Torque Specifications - For
Power Seat (3 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

ON-VEHICLE INSPECTION

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

1. INSPECT POWER SEAT MOTOR ASSEMBLY

a. Check the PTC operation inside the power seat motor.

HINT:

The PTC thermistor's resistance increases when the power seat switch is held down even after the
power seat has been moved to the maximum in one direction. If the resistance increases beyond a
specified level, current is cut to prevent a short circuit.

1. Choose a power seat function. Operate the power seat switch and move the seat as much as

possible in one direction. Keep the seat in that position for approximately 60 seconds.

2. Operate the power seat switch again and continue to try to move the seat in the same

direction as in the previous step. Measure the amount of time elapsed before current is
automatically cut (the sound of the motor has stopped).

Standard:

4 to 90 seconds

3. After current has been cut, release the power seat switch and wait for approximately 60

seconds.

4. Operate the same power seat switch and move the seat in the opposite direction. Check that

the motor operates.

REMOVAL

HINT:



Use the same procedures for the LH side and RH side.



The procedures listed below are for the LH side.

1. REMOVE FRONT SEAT ASSEMBLY LH

a. Remove the front seat (see REMOVAL ).

2. REMOVE SLIDE AND VERTICAL POWER SEAT SWITCH KNOB LH (see DISASSEMBLY )

3. REMOVE RECLINING POWER SEAT SWITCH KNOB LH (see DISASSEMBLY )

4. REMOVE FRONT SEAT CUSHION SHIELD LH (see DISASSEMBLY )

NOTE:



The inspection should be performed with the seat installed in
the vehicle.



Perform the 4 steps below for each power seat function.

CAUTION: Wear protective gloves. Sharp areas on the seat frame and adjuster may

injure your hands.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

5. REMOVE FRONT SEAT INNER BELT ASSEMBLY LH (See REMOVAL )

6. REMOVE INNER FRONT SEAT CUSHION SHIELD LH (see DISASSEMBLY )

7. REMOVE FRONT POWER SEAT SWITCH LH (see DISASSEMBLY )

8. REMOVE FRONT SEAT CUSHION COVER WITH PAD LH (see DISASSEMBLY )

9. REMOVE FRONT SEATBACK COVER WITH PAD LH (see DISASSEMBLY )

10. REMOVE RECLINING ADJUSTER INSIDE COVER LH (see DISASSEMBLY )

11. REMOVE RECLINING ADJUSTER INSIDE COVER RH (see DISASSEMBLY )

12. REMOVE FRONT SEATBACK SHIELD LH (see DISASSEMBLY )

13. REMOVE FRONT SEATBACK SHIELD RH (see DISASSEMBLY )

14. REMOVE LOWER FRONT SEAT CUSHION SHIELD LH (see DISASSEMBLY )

15. REMOVE LOWER FRONT SEAT CUSHION SHIELD RH (see DISASSEMBLY )

16. REMOVE LUMBAR SUPPORT ADJUSTER ASSEMBLY LH (w/ Lumbar Support Adjuster) (see

DISASSEMBLY )

17. REMOVE SEAT HEATER CONTROL SUB-ASSEMBLY LH (w/ Seat Heater System) (see

DISASSEMBLY )

18. REMOVE OCCUPANT CLASSIFICATION ECU (for Front Passenger Side) (see

DISASSEMBLY )

19. REMOVE SEAT POSITION AIRBAG SENSOR (See REMOVAL )

20. REMOVE FRONT SEAT WIRE LH

INSPECTION

1. INSPECT FRONT SEAT FRAME WITH ADJUSTER ASSEMBLY LH

a. Check operation of the seat frame (slide motor).

1. Check if the seat frame moves smoothly when the battery is connected to the slide motor

connector terminals.

OK

OPERATION OF SEAT FRAME (SLIDE MOTOR)

Measurement Condition Operational Direction

Battery positive (+) --> 1
Battery negative (-) --> 2

Front

Battery positive (+) --> 2
Battery negative (-) --> 1

Rear

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

Fig. 528: Identifying Front Seat Adjuster Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

If the result is not as specified, replace the seat frame with adjuster assembly.

b. Check operation of the seat frame (front vertical motor).

1. Check if the seat frame moves smoothly when the battery is connected to the front vertical

motor connector terminals.

OK

OPERATION OF SEAT FRAME (FRONT VERTICAL MOTOR)

If the result is not as specified, replace the seat frame with adjuster assembly.

Fig. 529: Identifying Front Seat Adjuster Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c. Check operation of the seat frame (lifter motor).

1. Check if the seat frame moves smoothly when the battery is connected to the lifter motor

connector terminals.

Measurement Condition Operational Direction

Battery positive (+) --> 1
Battery negative (-) --> 2

Up

Battery positive (+) --> 2
Battery negative (-) --> 1

Down

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra