Toyota Tundra. Manual — part 619

Fig. 29: Identifying Front Power Seat Control System Components Location (3 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

SYSTEM DIAGRAM

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

Fig. 30: Front Power Seat Control System Diagram - W/O Memory (Driver Side)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

Fig. 31: Front Power Seat Control System Diagram - W/O Memory (Passenger Side)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

OPERATION CHECK

1. CHECK FRONT POWER SEAT FUNCTION

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

Fig. 32: Identifying Front Power Seat Function
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

a. Check the basic functions.

1. Operate the power seat switches and check to make sure each seat function works:



Sliding



Front vertical (for Driver Seat)



Lifter (for Driver Seat)



Reclining



Lumbar support



Leg support (for Driver Seat)

2. CHECK POWER SEAT MOTOR ASSEMBLY (SLIDING, FRONT VERTICAL, LIFTER,

RECLINING, LUMBAR SUPPORT AND LEG SUPPORT)

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

NOTE:



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



Perform the 4 steps below for each power seat function.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra