Toyota 4Runner: Problem Symptoms Table

Toyota 4Runner Service Manual / Vehicle Interior / Seat / Climate Control Seat System / 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.

Climate Control Seat System

Symptom	Suspected Area	See page
Climate control seat system does not operate	Refreshing seat switch
Climate control seat system does not operate	Harness or connector	-
Seat heater LH does not operate	Refreshing seat switch
	Seat heater control sub-assembly LH
	Front seat cushion heater assembly LH
	Front seatback heater assembly LH
	Harness or connector	-
Seat heater RH does not operate	Refreshing seat switch
	Seat heater control sub-assembly RH
	Front seat cushion heater assembly RH
	Front seatback heater assembly RH
	Harness or connector	-
One or both blowers do not operate (LH)	Refreshing seat switch
	Seat cushion climate control blower LH	-
	Seatback climate control blower LH	-
	Air conditioning amplifier assembly
	Harness or connector	-
One or both blowers do not operate (RH)	Refreshing seat switch
	Seat cushion climate control blower RH	-
	Seatback climate control blower RH	-
	Air conditioning amplifier assembly
	Harness or connector	-

Operation Check

OPERATION CHECK 1. CHECK SEAT CUSHION CLIMATE CONTROL BLOWER (a) Turn the engine switch on (IG). (b) Set the refreshing seat switch blower side to level 3 (maximum). (c) Check that the fan motor t ...

On-vehicle Inspection

ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT SEAT HEATER CONTROL SUB-ASSEMBLY LH (a) Disconnect the b24 seat heater control sub-assembly LH connector. ...

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