Toyota Tundra Service Manual: Problem Symptoms Table

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

Symptom

Suspected Area

See page

Both seat heaters do not warm up

IG1 NO.5 relay

-

IG1 NO.5 fuse

-

Harness or connector

-

Air conditioning amplifier assembly

Front seat cushion heater RH does not warm up

LIN communication system

Harness or connector

-

Front seat cushion heater RH

Air conditioning control assembly (seat heater switch [for RH])

Seat heater control sub-assembly RH

Air conditioning amplifier assembly

Front seatback heater RH does not warm up

Harness or connector

-

Front seat cushion heater RH

Seat heater control sub-assembly RH

Front seatback heater RH

Front seat cushion heater LH does not warm up

LIN communication system

Harness or connector

-

Front seat cushion heater LH

Air conditioning control assembly (seat heater switch [for LH])

Seat heater control sub-assembly LH

Air conditioning amplifier assembly

Front seatback heater LH does not warm up

Harness or connector

-

Front seat cushion heater LH

Front seatback heater LH

Seat heater control sub-assembly LH

    Parts Location

    System Description

    See More:

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