Toyota 4Runner: System Diagram

Toyota 4Runner Service Manual / Vehicle Interior / Supplemental Restraint Systems / Airbag System / System Diagram

SYSTEM DIAGRAM

Transmitting ECU (Transmitter)	Receiving ECU	Signal	Communication Method
Center Airbag Sensor	ECM	Crash detection signal Fuel cut signal	CAN
Center Airbag Sensor	Main Body ECU	Driver seat buckle switch signal
Center Airbag Sensor	Combination Meter	SRS warning light on demand signal SRS warning light blink demand signal Passenger seat occupant detection signal Passenger seat buckle switch signal Diagnosis signal (DTC)
Combination Meter	Center Airbag Sensor	Vehicle speed signal Meter diagnosis polling signal
ECM	Center Airbag Sensor	Engine speed signal Accelerator opening angle information Accelerator opening angle signal Shift position signal Test mode signal Stop signal

Parts Location

PARTS LOCATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ...

How To Proceed With Troubleshooting

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

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Components COMPONENTS ILLUSTRATION Removal REMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedure for both the RH and LH sides. The procedure listed below is for the LH side. PROCEDURE 1. REMOVE REAR COMBINATION LIGHT LEN ...

Inspection
INSPECTION PROCEDURE 1. INSPECT NO. 1 COOLER THERMISTOR (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified ...