Event Notification Signal
Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS)
Event Notification Signal
A hardwired interface signal available from the RCM that is used to notify other subsystems that a significant restraints event has occurred.
The purpose of the deployment event notification feature is to provide other vehicle subsystems with information pertaining to restraint system deployment or fuel cutoff status. Events that may trigger the impact event notification feature include but are not limited to:
- Deployment of any deployable device
- Trigger events
- Fuel cutoff events
Each method of notification provides indication of normal operation, a deployment event or fuel cutoff event. Supplemental event data may also be available via the High Speed Controller Area Network (HS-CAN) network.
The event notification signal is provided by the RCM to the fuel pump control module. Signal communication between the RCM and fuel pump control module allows the PCM to initiate secondary fuel cut-off (inertia switch is primary) to disable the fuel system in the event of a crash.
The event notification signal consists of a hardwired Pulse-Width Modulation (PWM) signal from the RCM and transmitted to the fuel pump control module. The PCM monitors the event notification signal circuit from the fuel pump control module for faults and will set a DTC and turn ON the wrench light if a fault is detected with the event notification signal circuit. The RCM does not monitor for any circuit faults and will not set a DTC if a fault occurs.
Safety Belt Buckle Switches
As part of the SRS, the driver and front outboard passenger safety belt buckles are equipped with safety belt buckle switches. The safety belt buckle switches indicate to the RCM whether the safety belts are connected or disconnected. The RCM uses this information in determining the deployment rate of the dual-stage driver and passenger air bag modules.
Safety Belt Pretensioners
As part of the SRS, the driver and front outboard passenger safety belt buckles are equipped with pretensioners. The safety belt buckle pretensioners remove excess slack from the safety belt webbing. The pretensioners are activated by the RCM when the module detects a crash event force exceeding a programmed limit.
Safety Canopy(R) Module
Vehicles with a Safety Canopy(R) require a specific headliner. When installing a new headliner on a vehicle equipped with a Safety Canopy(R), make sure the correct headliner is being used. The word AIRBAG will appear on the headliner where it meets each B-pillar trim panel.
The Safety Canopy(R) module:
- is installed as an assembly.
- is mounted above the headliner.
- attaches from the A-pillar frame to the D-pillar frame.
- is standard equipment.
- cannot be interchanged from side to side.
- is used in conjunction with seat side air bag module.
Seat Track Position Sensor
The seat track position sensor indicates to the RCM the position of the driver seat along the seat track. The sensor detects the presence of a shunt bracket on the track, which indicates that the seat has moved forward beyond a certain point of adjustment. The RCM uses this information (and other information) in determining the deployment rate of the dual-stage driver air bag module.
Secondary Air Bag Warning (Chime)
The secondary air bag warning chime is an audible chime controlled by the IC module. If the IC module has detected a fault with the air bag warning indicator, a DTC will be stored in memory of the IC module. Upon receiving the message from the RCM that a SRS fault has been detected, the IC module will sound the secondary air bag warning chime in a pattern of 5 sets of 5 beeps.
Side Air Bag Module
A side air bag module provides protection of the thorax area (between the neck and abdomen) of the body, working in conjunction with the head protection provided by a Safety Canopy(R) module.
The side air bag module:
- will deploy upon receiving a flow of current from the RCM, initiated by the side impact sensor and internal RCM circuitry.
- is installed as an assembly.
- is mounted in the driver or passenger seat backrest.
- is used in conjunction with a Safety Canopy(R) module.
- is standard equipment.