Air Bag Control Module: Testing and Inspection

Downloading software and replacing the control module
New software for the supplemental restraint system module (SRS) can be downloaded. When ordering software, the hardware and the software in the car is compared to the information in the Volvo central database. If the comparison is OK the software is downloaded to the control module.
Software cannot be downloaded if the comparison between the car and the Volvo central database does not correspond.
When the control module is replaced, the new control module will have certain preprogrammed software.
The software which is preprogrammed is:
- application software
- diagnostic software
- collision algorithm software.
The software which will be downloaded is parameter files containing:
- parameters unique to this model
- equipment for the vehicle (passenger air bag, adaptive seatbelt force limiter etc.)
- a signal configuration file.