Toyota Yaris: How the SRS Air Bags Work / Driver Air Bag
The driver’s air bag is mounted in the steering wheel.
When air bag crash sensors
detect a frontal impact of
greater than moderate force,
the driver’s air bag inflates
quickly helping to reduce injury
mainly to the driver’s head or
chest caused by directly hitting
the steering wheel.

For more details about air bag deployment, refer to “SRS Air Bag
Deployment Criteria”.
The driver’s dual-stage air bag controls air bag inflation in two
energy stages. During an impact of moderate severity, the driver’s
air bag deploys with lesser energy, whereas during more severe
impacts, it deploys with more energy.
The front seat belt pretensioners are designed to deploy in moderate or
severe frontal, near frontal collisions.
In addition, the pretensioners operate when a side collision or a rollover
accident is detected...
The front passenger air bag is mounted in the front passenger
dashboard.
The inflation mechanism for the
front passenger air bag is the
same as the driver’s air bag, as
mentioned above...
Other information:
INSPECTION PROCEDURE 1. INSPECT TURN SIGNAL SWITCH (a) Check the resistance. (1) Measure the resistance according to the value(s) in the table below. Standard Resistance: Light Control Switch Tester Connection Condition Specified Condition z6-7 (A) - z6-5 (EL) Light control switch in AUTO position Below 1 Ω z6-3 (T) - z6-5 (EL) Light control switch in tail position Below 1 Ω z6-12 (H) - z6-5 (EL) Light control switch in head position Below 1 Ω Dimmer Passing Switch Tester Connection Condition Specified Condition z6-11 (HF) - z6-5 (EL) Dimmer switch in high flash position Below 1 Ω z6-16 (HU) - z6-5 (EL) Dimmer switch in high position Below 1 Ω Fog Light Switch Tester Connection Condition Specified Condition z6-4 (B) - z6-5 (EL) Fog light switch in rear position Below 1 Ω z6-13 (BFG) - z6-5 (EL) Fog light switch in front position Below 1 Ω Turn Signal Switch Tester Connection Condition Specified Condition z6-8 (TR) - z6-5 (EL) Turn signal switch in neutral position 10 kΩ or higher z6-14 (TL) - z6-5 (EL) Turn signal switch in neutral position 10 kΩ or higher z6-8 (TR) - z6-5 (EL) Turn signal switch in right turn position Below 1 Ω z6-8 (TR) - z6-5 (EL) Turn signal switch in full right turn position Below 1 Ω z6-8 (TR) - z6-6 (CR) Turn signal switch in full right turn position Below 1 Ω z6-6 (CR) - z6-5 (EL) Turn signal switch in full right turn position Below 1 Ω z6-14 (TL) - z6-5 (EL) Turn signal switch in left turn position Below 1 Ω z6-14 (TL) - z6-5 (EL) Turn signal switch in full left turn position Below 1 Ω z6-14 (TL) - z6-6 (CR) Turn signal switch in full left turn position Below 1 Ω z6-6 (CR) - z6-5 (EL) Turn signal switch in full left turn position Below 1 Ω If the result is not as specified, replace the turn signal switch...
PRECAUTION PRECAUTION FOR SEMICONDUCTOR POWER INTEGRATION ECU (a) Do not remove or install the semiconductor power integration ECU and power distribution box assembly with the negative (-) auxiliary battery terminal connected. NOTICE:
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal...
Categories
The front and side supplemental restraint systems (SRS) include different
types of air bags. Please verify the different types of air bags
which are equipped on your vehicle by locating the “SRS AIRBAG”
location indicators. These indicators are visible in the area where the
air bags are installed.
The air bags are installed in the following locations:
The steering wheel hub (driver air bag)
The front passenger dashboard (front passenger air bag)
The outboard sides of the front seatbacks (side air bags)
The front and rear window pillars, and the roof edge along both
sides (curtain air bags)
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