Toyota Tundra. Manual - part 620

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.

PROBLEM SYMPTOMS TABLE

HINT:



Use the table below to help determine the cause of the problem symptom. The potential causes of the
symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each
symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.



Inspect the fuses and relays related to the system before inspecting the suspected areas below.

Front power seat control system

FRONT POWER SEAT CONTROL SYSTEM

Symptom

Suspected Area

See

Front Power Seat does not
Operate with Front Power

Front power seat switch LH

POWER SEAT SWITCH (W/O

SEAT POSITION MEMORY

SYSTEM)

Front seat adjuster LH

FRONT POWER SEAT

MOTOR ASSEMBLY (FOR

POWER SEAT)

Front power seat lumbar switch
(for LH)

LUMBAR SUPPORT

ADJUSTER ASSEMBLY (FOR

MANUAL SEAT)

Leg support adjustment switch

FRONT POWER SEAT

LUMBAR SWITCH (FOR

MANUAL SEAT)

Seat Switch Front power seat
switch RH

POWER SEAT SWITCH (W/O

SEAT POSITION MEMORY

SYSTEM)

Front seat adjuster RH

FRONT POWER SEAT

MOTOR ASSEMBLY (FOR

POWER SEAT)

Front power seat lumbar switch
(for RH)

FRONT POWER SEAT

LUMBAR SWITCH (FOR

MANUAL SEAT)

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

SEAT HEATER SYSTEM

PARTS LOCATION

Fig. 33: Identifying Seat Heater System Components Location
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Harness and connector

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

SYSTEM DIAGRAM

Fig. 34: Seat Heater System Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

SYSTEM DESCRIPTION

1. GENERAL

a. By operating the seat heater switch, which is located in the integration control and panel, the

temperature is controlled to 31.5°C (88.7°F).

b. Whether the seat heater is ON or OFF can be determined by checking if the seat heater switch

indicator light is ON or OFF.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

c. The seat heaters of both seats are controlled by the seat heater switches, which are located on the

integration control and panel.

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking
the suspected areas in the order they are listed. Replace parts as necessary.

Seat heater system

SEAT HEATER SYSTEM

FRONT SEAT ASSEMBLY (FOR MANUAL SEAT)

Symptom

Suspected Area

See

Both seat heaters do not warm up

LH-IG fuse

SEAT-HTR fuse

Harness and connector

Front seat cushion heater RH does
not warm up

Seat heater switch (for RH)

SEAT HEATER SWITCH (FOR

COLUMN SHIFT TYPE)

Front seat cushion heater RH

FRONT SEAT CUSHION

HEATER (W/ SEAT HEATER

SYSTEM)

Harness and connector

Front seatback heater RH does not
warm up

Front seat cushion heater RH

FRONT SEAT CUSHION

HEATER (W/ SEAT HEATER

SYSTEM)

Front seatback heater RH

FRONT SEATBACK HEATER

(W/ SEAT HEATER SYSTEM)

Harness and connector

Front seat cushion heater LH does
not warm up

Seat heater switch (for LH)

SEAT HEATER SWITCH (FOR

COLUMN SHIFT TYPE)

Front seat cushion heater LH

FRONT SEAT CUSHION

HEATER (W/ SEAT HEATER

SYSTEM)

Harness and connector

Front seatback heater LH does not
warm up

Front seat cushion heater LH

FRONT SEAT CUSHION

HEATER (W/ SEAT HEATER

SYSTEM)

Front seatback heater LH

FRONT SEATBACK HEATER

(W/ SEAT HEATER SYSTEM)

Harness and connector

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Seat - Tundra

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