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.
If the comparison between the vehicle and Volvo central database is not OK, software downloading cannot occur.
When the control module is replaced, the new control module will have certain pre-programmed software.
The software which is pre-programmed is:
- application software
- diagnostic software
- collision algorithm software.
The software which will be downloaded is parameter files containing:
- parameters unique to this model
- information about the vehicle (passenger airbag, adaptive belt force limiter, etc.)
- a signal configuration file.