Component Description
Front Impact Severity Sensor
The front impact severity sensors measure acceleration (g-rate) and are hardwired to the RCM. Mounting orientation is critical for correct operation of the front impact severity sensors.
Occupant Classification System (OCS)
The OCS is found only on the front passenger seat. The OCS classifies the size of the front passenger seat occupant.
The OCS is comprised of a silicone gel-filled bladder mounted between the seat cushion foam and pan, an OCSM which is mounted to the seat frame, and a pressure sensor that is internal to the OCSM. Pressure is applied to the OCS bladder when weight of any occupant or object in the front passenger seat is present. The pressure is then transferred through a tube and sensed by the OCS pressure sensor and OCSM. The components of an OCS bladder system (bladder, tube, and OCSM with integrated pressure sensor) are serviced as an assembly, and the OCS bladder system is serviced as a kit with the seat cushion and seat heater mat (if applicable).
The Belt Tension Sensor (BTS) is a Hall-effect sensor that modifies a reference voltage supplied by the OCSM. As the amount of tension applied to the belt varies, so does the voltage that returns to the OCSM. The Belt Tension Sensor (BTS) is part of the front passenger safety belt buckle and can only be serviced with the buckle.
Safety Belt Buckle Sensor
The safety belt buckles contain integrated sensors that are Hall-effect switches. The safety belt buckle sensors are serviced with the safety belt buckle.
Safety Belt Tension Sensor (BTS)
The safety Belt Tension Sensor (BTS) is a 3-wire Hall-effect sensor that is part of the front passenger safety belt buckle and cannot be serviced separately from the front passenger safety belt buckle assembly.
Seat Position Sensor
The seat position sensor is a Hall-effect sensor which indicates the position of the seat along the seat track. The sensor detects the presence of a shunt bracket on the track, indicating the seat has moved past a certain point in the adjustment range.
Side Impact Sensor - C-pillar
The C-pillar side impact sensors measure acceleration (g-rate), and are hardwired to the RCM. Mounting orientation is critical for correct operation of the C-pillar side impact sensors.
Side Impact Sensor - Front Door
The front door side impact sensors measure air pressure within the door in order to detect certain crashes, such as a side impact. Mounting position and orientation is critical for correct operation of the front door side impact sensors.
Driver Airbag
The driver airbag is a dual-stage airbag. Upon receiving a flow of current, it deploys at 1 of 2 different rates, depending upon vehicle impact severity and sensor input.
Passenger Airbag
The passenger airbag is a dual-stage airbag which deploys at 1 of 2 different rates depending upon vehicle impact severity and sensor input.
Passenger Airbag Canister Vent
The passenger airbag canister vent is a deployable device that is part of the passenger airbag. Canister venting controls the inflation rate of the passenger airbag and the escape rate of gases from the vent. The canister vent cannot be serviced separately from the passenger airbag.
Passenger Airbag Deactivation (PAD) Indicator
The PAD indicator is a LED which is hardwired to the RCM.
Safety Belt Inflator
The safety belt inflator is a pyrotechnic device that deploys upon receipt of current flow initiated by the RCM. It is a canister that releases inert gas to deploy the inflatable shoulder belt.
The safety belt inflators are attached to a bracket along with the second row safety belt buckles and cannot be serviced separately from the bracket and buckles. When replacing safety belt system components, use only the replacement parts specified in the parts catalog.
To diagnose any safety belt inflator Diagnostic Trouble Codes (DTCs): Refer to: Airbag Supplemental Restraint System (SRS) .
Safety Belt Retractor and Adaptive Load Limiter
The front passenger safety belt retractor is equipped with the adaptive load limiting feature that works in conjunction with the safety belt buckle pretensioner to control the tension of the front passenger safety belt in the event of a crash. The front passenger safety belt retractor is also referred to as the seatbelt load limiter.
To diagnose any adaptive load limiter Diagnostic Trouble Codes (DTCs): Refer to: Airbag Supplemental Restraint System (SRS) .
For any concerns regarding safety belt retractor function: Refer to: SAFETY BELT SYSTEM (HYBRID/ENERGI) .
Safety Belt Retractor and Pretensioner
The safety belt retractor and pretensioner is a pyrotechnic device that removes excess webbing from the safety belts when deployed.
To diagnose any pretensioner Diagnostic Trouble Codes (DTCs): Refer to: Airbag Supplemental Restraint System (SRS) .
For any concerns regarding safety belt retractor function: Refer to: SAFETY BELT SYSTEM (HYBRID/ENERGI) .
Side Air Curtain
The side air curtain is a single-stage airbag which is designed to protect the vehicle occupant(s) during certain side impact crashes. It deploys upon receipt of current flow, in conjunction with the seat side airbag.
Side Airbag
The side airbag is a single-stage airbag which deploys upon receipt of current flow. It is attached to the outboard side of each front seat and is used in conjunction with the side air curtain.
Clockspring
The clockspring allows for continuous electrical connections between the driver airbag and the RCM. A spiral-wound cable wraps around the center of the clockspring and as the steering wheel is turned, the spiral cable inside expands or contracts in diameter as the 2 halves of the clockspring turn.
Restraints Control Module (RCM)
The RCM monitors various sensor inputs and uses that data for controlling SRS outputs such as Belt-Minder® function and airbag deployment.
The RCM includes a backup power supply. This feature provides sufficient backup power to deploy the airbags in the event the ignition circuit is lost or damaged during impact. The backup power supply depletes its stored energy approximately one minute after power and/or ground has been removed from the RCM.
The RCM requires Programmable Module Installation (PMI) when being replaced. Refer to the diagnostic scan tool instructions to carry out Programmable Module Installation (PMI).