Toyota Tundra Service Manual: System Description

SYSTEM DESCRIPTION

1. GENERAL

(a) The heater and blower both have 3 levels controlled by operating the seat heater switch, which is located in the air conditioning control assembly.

(b) The on/off state of the heater or blower can be determined by checking if the seat heater switch indicator light is on or off.

(c) The blowers of both seats are controlled by the air conditioning amplifier assembly.

(d) The seat heaters of both seats are controlled by the seat heater controls, which are located under their respective seats.

    Problem Symptoms Table

    System Diagram

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    TEST MODE PROCEDURE TEST MODE (SIGNAL CHECK MODE) PROCEDURE HINT: When entering test mode (signal check mode), the tire pressure warning ECU and receiver sets all the test mode (signal check mode) DTCs first. After the tire pressure warning ECU and receiver completes the signal check for each inspec ...

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