Toyota 4Runner: Problem Symptoms Table

Toyota 4Runner Service Manual / Vehicle Exterior / Window / Glass / Window Defogger 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.

Window Defogger System

Symptom	Suspected Area	See page
Rear window defogger system does not operate	Proceed to "Rear Window Defogger System does not Operate"

Operation Check

OPERATION CHECK 1. CHECK WINDOW DEFOGGER SYSTEM OPERATION (a) When the ignition switch is turned to ON and the heater control (window defogger switch) is pressed, check that the window defogger op ...

Terminals Of Ecu

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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On-vehicle Inspection
ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT NOTICE: Water or deteriorated brake fluid. Sealed areas or brake fluid may deteriorate and lead to fluid leaks or decreased efficiency. PROCEDURE 1. CHECK FLUID LEVEL IN RESERVOIR (a) Turn the en ...

Calibration
CALIBRATION 1. DESCRIPTION (a) After replacing VSC-related components, clearing and reading the sensor calibration data is necessary. (b) Follow the chart to perform calibration. Part Replaced Necessary Operation Ma ...