If the electronic control module remains undamaged by fire, what can a technician do?

When the electronic control module (ECM) of a vehicle remains undamaged by fire, a technician can download data in a readable form. The ECM, which is often central to a vehicle's operation, stores important information related to the vehicle's performance and operational parameters. This can include fault codes, sensor readings, and operational history, all of which can provide valuable insights into what occurred before the fire event. By downloading this data, the technician can analyze the information to help determine the cause of issues or confirm operations prior to the fire.

The other choices involve actions that may not be viable or necessary when the ECM is intact. For instance, replacing the module would be unnecessary if it is undamaged. Changing the vehicle's settings may not be possible if the focus is on investigating the fire, as it could alter important forensic data. Running diagnostics could potentially be an option, but it generally relies on existing damaged data rather than the retrieval of the stored information, which is what makes downloading the data directly the most relevant and beneficial action in this context.