Toyota 4Runner: Problem Symptoms Table

Toyota 4Runner Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System(for Entry Function) / 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.

Smart Key System

Symptom	Suspected Area	See page
All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate	Power door lock control system
	Electrical key transmitter
	Transmitter battery
	Door control receiver
	Certification ECU
	Harness or connector
All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate	Electrical key transmitter
	Certification ECU
Driver Side Door Entry Unlock Function does not Operate	Power door lock control system
	Front door outside handle assembly (for driver side)
	Certification ECU
	Harness or connector
Front Passenger Side Door Entry Unlock Function does not Operate	Power door lock control system
	Front door outside handle assembly (for front passenger side)
	Certification ECU
	Harness or connector
Driver Side Door Entry Lock and Unlock Functions do not Operate	Power door lock control system
	Front door outside handle assembly (for driver side)
	Certification ECU
	Harness or connector
Front Passenger Side Door Entry Lock and Unlock Functions do not Operate	Power door lock control system
	Front door outside handle assembly (for front passenger side)
	Certification ECU
	Harness or connector
Driver Side Door Entry Lock Function does not Operate	Power door lock control system
	Front door outside handle assembly (for driver side)
	Certification ECU
	Harness or connector
Front Passenger Side Door Entry Lock Function does not Operate	Power door lock control system
	Front door outside handle assembly (for front passenger side)
	Certification ECU
	Harness or connector
Room Oscillator does not Recognize Key	Smart key system (for Start Function)
	Indoor No. 1 electrical key antenna (front floor)
	Indoor No. 2 electrical key antenna (rear floor)
	Indoor No. 2 electrical key antenna (inside luggage)
	Certification ECU
	Harness or connector
	Electrical key transmitter
Entry Interior Alarm does not Sound	Meter/gauge system
Entry Interior Alarm does not Sound	Certification ECU
Back Door Entry Unlock Function does not Operate	Power door lock control system
	Back door control switch
	Certification ECU
	Harness or connector
Back Door Entry Lock and Unlock Functions do not Operate	Power door lock control system
	Electrical key antenna (outside luggage)
	Certification ECU
	Harness or connector
Back Door Entry Lock Function does not Operate	Power door lock control system
	Back door control switch
	Certification ECU
	Harness or connector

Dtc Check / Clear

DTC CHECK / CLEAR 1. CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Smart Key / ...

Terminals Of Ecu

TERMINALS OF ECU 1. CHECK CERTIFICATION ECU (a) Disconnect the F79 certification ECU connector. (b) Measure the voltage and resistance according to the value(s) in the table below. ...

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