Restraint System Diagnostic Service Tool Warning
Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS)
Restraint System Diagnostic Service Tool Warning
WARNING: Remove restraint system diagnostic tools from the vehicle prior to road testing. If tools are not removed, the supplemental restraint system (SRS) device may not deploy in a crash. Failure to follow this instruction may result in serious personal injury or death in a crash and possibly violate vehicle safety standards.
Safety Belt Buckle Switches
The safety belt buckle switches are comprised of integrated circuits called Hall-effect sensors. The safety belt buckle switches (Hall-effect sensors) are located in the driver and front passenger safety belt buckles. Safety belt buckle switches are used to indicate to the RCM whether the safety belts are buckled or unbuckled. The RCM uses this information in determining the deployment of the dual-stage driver and passenger air bag modules.
Safety Belt Retractor Pretensioners
This vehicle is equipped with driver and front passenger safety belt retractor pretensioners. Safety belt retractor pretensioners are pyrotechnic devices integrated to the driver and front passenger safety belt retractor assemblies. The safety belt retractor pretensioners control the tension of the driver and passenger safety belts in the event of a deployable collision. The RCM monitors the readiness of the safety belt retractor pretensioners. The RCM uses this information and all other information provided by the restraints system to determine what action is to be taken.
Belt Tension Sensor (BTS)
The BTS:
- is part of the front outboard passenger safety belt buckle assembly.
- is located on the front passenger seat track safety belt buckle mounting bracket.
- is used in conjunction with the OCS system.
- is a 3-wire Hall-effect sensor that is incorporated into the mounting anchor of the front outboard passenger safety belt buckle assembly.
The BTS is used by the OCS system to identify the presence of a child safety seat on the front outboard passenger seat, when the child safety seat is installed according to manufacturer instructions. The BTS senses the tension on the safety belt assembly then provides an output to the OCSM, indicating that the safety belt assembly is cinched. After sensing the weight applied to the seat by the occupant and using the safety BTS input, the OCSM determines how the occupant should be classified and communicates this information to the RCM. If the occupant is classified to be a child, the RCM will then automatically deactivate the passenger air bag module and turn the PAD indicator on. Refer to Passenger Air Bag Deactivation (PAD) Indicator for the indicator status and operation.
Seat Track Position Sensor
The seat track position sensor is a Hall-effect sensor located on the driver seat track. Based on programmed limits, the seat track position sensor will inform the RCM of the driver seat position. The RCM uses this information in determining the deployment of the dual-stage driver air bag module and deployment of the collapsible column.
Secondary Air Bag Warning (Chime)
The secondary air bag warning chime, is an audible chime generated by the LCM. If the RCM has detected a fault with the air bag warning indicator, a DTC will be stored in the memory of the RCM. Upon the RCM sensing that a SRS fault has been detected, the RCM will signal the LCM to sound the secondary air bag warning chime in a pattern of 5 sets of 5 beeps.
Seat Side Air Bag Module
The driver/passenger seat side air bag module:
- will deploy upon receiving a signal from the RCM initiated by the driver/passenger side impact sensor.
- is installed as an assembly.
- is mounted in the seat back.