Control module, OnStar, OIM (OnStar Interface Module)

The OIM (OnStar Interface Module) works as an interface between the VCIM (Vehicle Communication Interface Module) and the car's airbag control module, horn and the hazard warning lights. Communication with the VCIM is effected via an internal bus. Signals from the airbag control module and to the horn and hazard warning lights are converted to a bus message for communication with the VCIM. The module is connected to the car wiring harness via a 16 pin connector.