Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
System Description
- GENERAL
- Deceleration sensors used for the airbag system are installed on various parts on the vehicle and calculate the deceleration rate of each part during a collision.
- Depending on the situation, the airbag ECU assembly sends a deployment signal to each airbag and pretensioner based on the information from each sensor.
- DEPLOYMENT CONDITION
- FRONTAL COLLISION
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- 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 may be output after receiving an ON signal from the deceleration sensor built in the airbag ECU assembly even without a signal from the front airbag sensors.
- Frontal collision signals are used to deploy the airbags and pretensioners in the illustration.
HINT:
The occupant classification system restricts the deployment of the instrument panel passenger airbag assembly and front seat outer belt assembly RH. Refer to FAIL-SAFE CHART .
- Frontal collision signals are produced based on the information from the airbag ECU assembly and front airbag sensors.
- SIDE COLLISION (Pattern 1)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Side collision (Pattern 1) signals are produced based on the information from the airbag ECU assembly and side airbag sensor assembly.
- Side collision (Pattern 1) signals are used to deploy the airbags in the illustration.
- SIDE COLLISION (Pattern 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Side collision (Pattern 2) signals are produced based on the information from the airbag ECU assembly and side No. 2 airbag sensor assembly.
- Side collision (Pattern 2) signals are used to deploy the airbag in the illustration.
- FRONTAL COLLISION
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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