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Lotus Service Notes Section WD Page 11 Inspections Required After an Accident All SRS system components, including harnesses and brackets, must be inspected after an accident. If any are damaged or bent, they must be replaced even if a deployment did not occur. If the SRS was deployed, Inspect the steering column for damage or telescoping (see Section HG) and column mounting brackets for damage. Inspect the chassis scuttle beam in the area of the passenger airbag mounting brackets for WARNING: Proper operation of the SRS system requires that any repairs to the vehicle structure WD.7 - THEORY OF OPERATION The key components of the Supplementary Restraint System (SRS) are the following: • Sensor & Diagnostic Module (SDM); • Driver airbag module; • Passenger airbag module; • Rotary connector; • Seat belt pre-tensioners. Sensor & Diagnostic Module (SDM) The SDM is the main electronic control unit (ECU) of the SRS, whose function is to detect rates of forward deceleration, and when interpreted as a collision accident requiring supplementary occupant protection, the The unit is mounted by a dedicated bracket to the top of the passenger side scuttle beam, accessible after removal of the fascia top. The following functionality is provided by the SDM; • Sensing of frontal impact crash events and vehicle specific discrimination between non-deployment and • In case of a required deployment, timely activation of the activation current for the deployment loops. • Detection of electrical system faults which may influence the readiness of the system to deploy, or in- |