Toyota 4Runner: System Diagram

Toyota 4Runner Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Engine Immobiliser System(w/ Smart Key System) / System Diagram

SYSTEM DIAGRAM

Communication Table

Sender	Receiver	Signal	Line
Certification ECU	Power management control ECU	Engine immobiliser system set/unset signal Engine start signal Transponder valid signal Steering unlock demand signal Steering lock demand signal	LIN
Power management control ECU	Certification ECU	Key code recognition signal Engine start operation signal ACC relay activation signal IG relay activation signal
ID code box	Certification ECU	Matching request random number signal EFI code reception signal Engine start permission demand reception signal S code verification result signal L code verification result signal Steering unlock demand reception signal Steering lock demand reception signal
ID code box	Steering lock ECU	Steering lock release signal Matching request random number signal
Steering lock ECU	Certification ECU	L code verification signal

System Description

SYSTEM DESCRIPTION 1. ENGINE IMMOBILISER SYSTEM DESCRIPTION (a) The engine immobiliser system determines whether or not to enable starting of the SFI system based on a comparison of the key ID cod ...

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT HINT: Use these procedures to troubleshoot the engine immobiliser system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO ...

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Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Navigation System / Trouble Codes. (e) Check for DTCs (Click here ). ...

Pressure Control Solenoid "A" Electrical (Shift Solenoid Valve SL1) (P0748)
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