Toyota Tundra Service Manual: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, 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 this system before inspecting the suspected areas below.

Front Power Seat Control System (for Driver Side)

Symptom	Suspected Area	See page
Front power seat does not operate with front power seat switch	Proceed to "Front Seat does not Operate with Front Power Seat Switch"
One or more power seat motors do not operate	Proceed to "One or more Power Seat Motors do not Operate"
Power seat position is not memorized	Proceed to "Power Seat Position is not Memorized"
Power seat does not return to memorized position	Proceed to "Power Seat does not Return to Memorized Position"
Wireless transmitter memory function does not operate	Proceed to "Wireless Transmitter Memory Function does not Operate"
Wireless-linked return function does not operate.	Proceed to "Wireless-linked Return Function does not Operate"
Power seat power easy access system function does not operate	Proceed to "Power Seat Power Easy Access System Function does not Operate"
Only lumbar support operation function does not operate	Harness or connector	-
	Front power seat switch LH (lumbar support control)
	Lumbar support adjuster assembly LH (lumbar motor)
Only leg support operation function does not operate	Harness or connector	-
	Front power seat switch LH (seat cushion control)
	Front seat cushion frame sub-assembly LH (leg motor)

Front Power Seat Control System (for Front Passenger Side)

Symptom	Suspected Area	See page
All functions do not operate	Harness or connector	-
All functions do not operate	Power seat switch assembly
Only slide operation function does not operate	Harness or connector	-
	Power seat switch assembly
	Front seat cushion frame sub-assembly RH (slide motor)
Only reclining operation function does not operate	Harness or connector	-
	Power seat switch assembly
	Front seatback frame sub-assembly RH (reclining motor)
Only lumbar support operation function does not operate	Harness or connector	-
	Front power seat switch LH (lumbar support control)
	Lumbar support adjuster assembly RH (lumbar motor)

Toyota Tundra Service Manual > Audio And Visual System: Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter
DESCRIPTION Audio function: This circuit is necessary for the automatic sound levelizer (ASL) built into the radio and display receiver assembly. ASL function: Speed signals are received from the combination meter assembly and used for the ASL. The ASL function automatically adjusts the sound volume ...

Toyota Tundra Owners Manual