Toyota 4Runner: Problem Symptoms Table

Toyota 4Runner Service Manual / Vehicle Exterior / Window / Glass / Windshield Deicer 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.

Windshield Deicer System

Symptom	Suspected Area	See page
Window deicer switch is turned on but does not operate (Indicator on)	Air conditioning amplifier assembly
	Windshield glass (Windshield deicer wire)	-
	Harness or connector	-
Window deicer switch is turned on but does not operate (Indicator off)	Outer mirror heater switch assembly
	Air conditioning amplifier assembly
	Windshield glass (Windshield deicer wire)	-
	Harness or connector	-

System Description

SYSTEM DESCRIPTION 1. WINDSHIELD DEICER SYSTEM DESCRIPTION The windshield deicer system thin heater wires are attached to the inside of the front window and deice the window surface quickly. The i ...

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TERMINALS OF ECU 1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (a) Disconnect the F42 air conditioning amplifier connector. (b) Measure the voltage and resistance according to the value(s) in the ...

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