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.

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