Purpose
The lap pre-tensioner seat belts retract and tighten the seat belt webbing to protect the front passengers during a collision.
Function
The lap pre-tensioner seat belts operate (deploy) based on the operation signal from the SAS control module to instantly retract and tighten the belt webbing, restraining the driver.
The lap pre-tensioner seat belts operate in conjunction with the pre-tensioner seat belts.

Construction
The lap pre-tensioner seat belts are installed to the anchors of the front seat belts.
The lap pre-tensioner seat belts consist of the following parts shown in the figure:

Operation
Lap pre-tensioner activation
1. The gas generator emits a spark when a signal is received from the SAS control module, causing gas to form.
2. The gas pressure pushes the piston inside the tube, pulling the lead wire.
3. As the lead wire is pulled, the part of the seat belt attached to the wire is also pulled.
4. The slack in the belt is tightened by the front seat belt being pulled by the lap pre-tensioner seat belt and the seat belt ELR mechanism, restraining the passengers.

After activation
1. After operating (deploying) the pre-tensioner, the lead wire is pulled back. However the front seat belts are locked by activation of the stopper function so that the belt webbing is not released.
2. The restraint force of the seat belt is adjusted by the front seat belt load limiter mechanism, preventing injury to the driver and passenger from seat belt pressure.

Fail-safe
Function not equipped.
Ion Sensor
Neutral Switch InspectionAir Bag System Warning Light [Standard Deployment Control System]
Purpose
The air bag system warning light notifies the driver of a malfunction in
the SRS air bag system.
Function
If a malfunction occurs in the SRS air bag system, the air bag system warning
light illuminates or flashes.
Construction
LEDs (light-emitting d ...
Exhaust System
Purpose, Outline
A 4-2-1 exhaust system has been adopted which reduces residual gas in the
cylinders using the scavenging effect and contributes to a high compression
ratio.
The loop structure of the exhaust pipes for the 4-2-1 system takes up less
space.
Structural Vie ...
Electric Variable Valve Timing Relay [Skyactiv G 2.0]
Purpose, Function
The electric variable valve timing actuator relay supplies power to the electric
variable valve timing motor/driver after receiving the signal from the PCM.
Construction
The electric variable valve timing actuator relay is installed to the relay
block..
...