Lexus NX: System Description

SYSTEM DESCRIPTION

GENERAL

(a) Deceleration sensors used for the airbag system are installed on various parts of the vehicle and calculate the deceleration rate of each part during a collision.

(b) Depending on the situation, the airbag ECU assembly sends a deployment signal to each airbag based on the information from each sensor.

DEPLOYMENT CONDITION

(a) FRONTAL COLLISION

(1) Frontal collision signals are produced based on the information from the airbag ECU assembly and front airbag sensors.

HINT:

In case of a frontal collision, the SRS ignition signal could be output with the deceleration sensor ON signal even without a signal from the front airbag sensors.

(2) Frontal collision signals are used to deploy the airbags and pretensioners in the illustration.

(b) SIDE COLLISION (1)

(1) Side collision (Pattern 1) signals are produced based on the information from the airbag ECU assembly and door side airbag sensor.

(2) Side collision (Pattern 1) signals are used to deploy the airbags and pretensioners in the illustration.

(c) SIDE COLLISION (2)

(1) Side collision (Pattern 2) signals are produced based on the information from the airbag ECU assembly and side airbag sensor assembly.

(2) Side collision (Pattern 2) signals are used to deploy the airbags and pretensioners in the illustration.

(d) ROLLOVER

(1) A circuit to detect vehicle rollover is built into the airbag ECU assembly.

(2) When the conditions for vehicle rollover are met, the airbag ECU assembly deploys the SRS items in the illustration.

READ NEXT:

 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 NEXT 2. IN

 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 pr

 Terminals Of Ecu

TERMINALS OF ECU AIRBAG ECU ASSEMBLY Terminal No. Terminal Symbol Destination I58-1 P2+ Instrument panel passenger airbag assembly (Front passenger side squib 2nd step) I58-2 P2-

SEE MORE:

 Installation

INSTALLATION PROCEDURE 1. INSTALL INTEGRATION CONTROL AND PANEL ASSEMBLY (ELECTRIC PARKING BRAKE SWITCH) (a) Install the integration control and panel assembly (electric parking brake switch) to the upper rear console panel sub-assembly with the 2 screws. HINT: The locations labeled A in the illu

 Floor Mats

Warning If a floor mat is the wrong size or is not properly installed, it can interfere with the pedals. Interference with the pedals can cause unintended acceleration and/or increased stopping distance which can cause a crash and injury. Make sure the floor mat does not interfere with the pedals.

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