Toyota 4Runner: System Diagram

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

SYSTEM DIAGRAM

Communication Table

Sender	Receiver	Signal	Line
Main Body ECU	Certification ECU	Front door courtesy light switch LH signal Front door courtesy light switch RH signal Rear door courtesy light switch LH signal Rear door courtesy light switch RH signal Back door courtesy light switch signal Steering wheel location information (vehicle type) signal Door lock position signal Back door control switch signal	CAN
Power Management Control ECU	Certification ECU	IG signal ACC signal Engine switch signal	LIN
Combination Meter Assembly	Certification ECU Main Body ECU	Vehicle speed signal	CAN
Steering Lock ECU	Certification ECU	Encryption code signal Encryption code finish signal Encryption calculate fixed number memory requirement signal During entry control signal	LIN
ID Code Box	Certification ECU	Matching request random number signal	LIN
Certification ECU	Combination Meter Assembly	Inside key existence warning signal Low key battery warning signal Shift position warning signal Meter buzzer request signal Door open indicate signal Steering lock warning signal	CAN
Certification ECU	Main Body ECU	Entry door lock signal Entry door unlock signal Door lock/unlock standby control signal Wireless door lock buzzer sound signal	CAN
Certification ECU	Power Management Control ECU	Immobiliser ID entry required signal Key code check signal	LIN
Certification ECU	ID Code Box	Replay ID code signal	LIN
Multiplex Network Door ECU (Back Door P/W)	Main Body ECU	Back door control switch signal	LIN

System Description

SYSTEM DESCRIPTION CAUTION: If using a pacemaker, be sure to read the manual of the pacemaker before using the key, as the radio waves of the key may affect the pacemaker. 1. SMART KEY SYSTEM DES ...

Customize Parameters

CUSTOMIZE PARAMETERS 1. CUSTOMIZING FUNCTION WITH TECHSTREAM HINT: The following items can be customized. NOTICE: When the customer requests a change in a function, first make sure that ...

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Installation
INSTALLATION CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH and LH sides. The procedure listed below is for the LH side. When installing the window frame moulding, heat the vehicle body and window frame moulding using a ...

How To Proceed With Troubleshooting
HOW TO PROCEED WITH TROUBLESHOOTING 1. OPERATION FLOW HINT: Perform troubleshooting in accordance with the procedures below. The following is an outline of basic troubleshooting procedures. Confirm the troubleshooting procedures for the circuit you are ...