The SRS consists of the following components:
1. Driver's front air bag module
2. Passenger's front air bag module
3. Side air bag modules
4. Curtain air bag modules
5. Retractor pre-tensioner assemblies
6. Air bag warning light
7. SRS control module (SRSCM)/ Rollover sensor
8. Front impact sensors
9. Side impact sensors
10. Side pressure sensors
11. Driver's knee air bag module
12. Emergency Fastening Device System
13. Occupant classification system
The SRSCM (Supplemental Restraint System Control Module) continually monitors all SRS components while the ignition switch is in the ON position to determine if a crash impact is severe enough to require air bag deployment or pretensioner seat belt deployment.
SRS warning light
The SRS (Supplement Restraint System) air bag warning light on the instrument panel displays the air bag symbol depicted in the illustration. The system checks the air bag electrical system for malfunctions. The light indicates that there is a potential malfunction with your air bag system, which could include your side and curtain air bags used for rollover protection.
WARNING
If your SRS malfunctions, the air bag may not inflate properly during an accident increasing the risk of serious injury or death.
If any of the following conditions occur, your SRS is malfunctioning:
Have an authorized HYUNDAI dealer inspect the SRS as soon as possible if any of these conditions occur.
During a frontal collision, sensors will detect the vehicle's deceleration. If the rate of deceleration is high enough, the control unit will inflate the front air bags.
The front air bags help protect the driver and front passenger by responding to frontal impacts in which seat belts alone cannot provide adequate restraint. When needed, the side air bags help provide protection in the event of a side impact or rollover.
You can take steps to help reduce the risk of being injured by an inflating air bag. The greatest risk is sitting too close to the air bag. An air bag needs about 10 inches (25 cm) of space to inflate. NHTSA recommends that drivers allow at least 10 inches (25 cm) between the center of the steering wheel and the chest.
WARNING
To reduce the risk of serious injury or death from an inflating air bag, take the following precautions:
When the SRSCM detects a sufficiently severe impact to the front of the vehicle, it will automatically deploy the front air bags.
Upon deployment, tear seams molded directly into the pad covers will separate under pressure from the expansion of the air bags. Further opening of the covers allows full inflation of the air bags.
A fully inflated air bag, in combination with a properly worn seat belt, slows the driver or the front passenger forward motion, reducing the risk of head and chest injury.
After complete inflation, the air bag immediately starts deflating, enabling the driver to maintain forward visibility and the ability to steer or operate other controls.
WARNING
To prevent objects from becoming dangerous projectiles when the passenger's air bag inflates:
Hyundai Elantra AD (2016-2020) Service Manual: Repair procedures
Inspection
Steering Wheel Play Inspection
1.
Turn the steering wheel so that the front wheels can face straight ahead.
2.
Measure the distance the steering wheel can be turned without moving the front wheels.
Standard value : 30mm (1.18in.) or less
3.
If the play exceeds standard v ...
Hyundai Elantra AD (2016-2020) Service Manual: Seat Heater Switch Schematic Diagrams
Circuit Diagram
[Front Seat Heater Switch (Driver)]
[Front Seat Heater Switch (Passenger)]
[Rear Seat] ...