Jeep Cherokee (KL): Advanced Front Air Bag Operation. Occupant Classification System (OCS) - Front Passenger Seat. Occupant Classification Module (OCM) and Sensor

Advanced Front Air Bag Operation. Occupant Classification System (OCS) - Front Passenger Seat. Occupant Classification Module (OCM) and Sensor

Advanced Front Air Bag Operation

Advanced Front Air Bags are designed to provide additional protection by supplementing the seat belts. Advanced Front Air Bags are not expected to reduce the risk of injury in rear, side, or rollover collisions. The Advanced Front Air Bags will not deploy in all frontal collisions, including some that may produce substantial vehicle damage - for example, some pole collisions, truck underrides, and angle offset collisions.

On the other hand, depending on the type and location of impact, Advanced Front Air Bags may deploy in crashes with little vehicle front-end damage but that produce a severe initial deceleration.

Because air bag sensors measure vehicle deceleration over time, vehicle speed and damage by themselves are not good indicators of whether or not an air bag should have deployed.

Seat belts are necessary for your protection in all collisions, and also are needed to help keep you in position, away from an inflating air bag.

When the ORC detects a collision requiring the Advanced Front Air Bags, it signals the inflator units.Alarge quantity of non-toxic gas is generated to inflate the Advanced Front Air Bags.

The steering wheel hub trim cover and the upper right side of the instrument panel separate and fold out of the way as the air bags inflate to their full size. The Advanced Front Air Bags fully inflate in less time than it takes to blink your eyes. The air bags then quickly deflate while helping to restrain the driver and front passenger.

Occupant Classification System (OCS) - Front Passenger Seat

The OCS is part of a Federally regulated safety system for this vehicle. It is designed to provide Passenger Advanced Front Air Bag output appropriate to the occupant's seated weight, as determined by the OCS.

The Occupant Classification System (OCS) consists of the following:

  • Occupant Restraint Controller (ORC)
  • Occupant Classification Module (OCM) and Sensor located in the front passenger seat
  • Air Bag Warning Light

Occupant Classification Module (OCM) and Sensor

The Occupant Classification Module (OCM) is located underneath the front passenger seat. The Sensor is located beneath the passenger seat cushion foam. Any weight on the seat will be sensed by the Sensor. The OCM uses input from the Sensor to determine the front passenger's most probable classification. The OCM communicates this information to the ORC. The ORC may reduce the inflation rate of the Passenger Advanced Front Air Bag deployment based on occupant classification. In order for the OCS to operate as designed, it is important for the front passenger to be seated properly and properly wearing the seat belt.

The OCS will NOT prevent deployment of the Passenger Advanced Front Air Bag. The OCS may reduce the inflation rate of the Passenger Advanced Front Air Bag if the OCS estimates that:

  • The front passenger seat is unoccupied or has very light objects on it; or
  • The front passenger seat is occupied by a small passenger, including a child; or
  • The front passenger seat is occupied by a rear-facing child restraint; or
  • The front passenger is not properly seated or his or her weight is taken off of the seat for a period of time.
Front Passenger Seat Occupant Status Front Passenger Air Bag Output
Rear-facing child restraint Reduced-power deployment
Child, including a child in a forward-facing child restraint or booster seat* Reduced-power deployment OR Fullpower deployment
Properly seated adult Full-power deployment OR reduced-power deployment
Unoccupied seat Reduced-power deployment

* It is possible for a child to be classified as an adult, allowing a full-power Passenger Advanced Front Air Bag deployment. Never allow children to ride in the front passenger seat and never install a child restraint system, including a rear-facing child restraint, in the front passenger seat.

WARNING!

  • Never place a rear-facing child restraint in front of an air bag. A deploying Passenger Advanced Front Air Bag can cause death or serious injury to a child 12 years or younger, including a child in a rearfacing child restraint.
  • Only use a rear-facing child restraint in a vehicle with a rear seat.
  • Children 12 years or younger should always ride buckled up in a rear seat.

The OCS determines the front passenger's most probable classification. The OCS estimates the seated weight on the front passenger seat and where that weight is located.

The OCS communicates the classification status to the ORC. The ORC uses the classification to determine whether the Passenger Advanced Front Air Bag inflation rate should be adjusted.

In order for the OCS to operate as designed, it is important for the front passenger to be seated properly and properly wearing the seat belt. Properly seated passengers are:

  • Sitting upright
  • Facing forward
  • Sitting in the center of the seat with their feet comfortably on or near the floor
  • Sitting with their back against the seatback and the seatback in an upright position

Seated Properly
Seated Properly

Lighter Weight Passengers (Including Small Adults)

When a lighter weight passenger, including a small adult, occupies the front passenger seat, the OCS may reduce the inflation rate of the Passenger Advanced Front Air Bag. This does not mean that the OCS is working improperly.

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