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

Front Power Seat Control System (for Driver Side)

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

Toyota Tundra Service Manual > Lin Communication System: Front Passenger Side Door ECU Communication Stop (B2322)
DESCRIPTION This DTC is stored when LIN communication between the front power window regulator motor assembly RH and main body ECU (multiplex network body ECU) stops for 10 seconds or more. DTC No. DTC Detection Condition Trouble Area B2322 No communication between the front power window regulator m ...

Toyota Tundra Owners Manual