Before servicing an airbag system, what action should be taken according to both technicians A and B?

The correct action before servicing an airbag system is to follow the manufacturer's disarming procedure. This procedure is critical because airbag systems contain explosive components that can deploy unexpectedly if not properly disarmed, potentially causing injury to both the technician and the vehicle occupants.

Following the manufacturer's disarming procedure ensures that all necessary precautions are taken, such as waiting a specific amount of time after disconnecting the battery to allow any stored electrical energy to dissipate, and following any particular steps required to turn off the system safely. This is often a multifaceted process involving both disconnecting the power source and potentially using specialized tools or diagnostic equipment to ensure that the airbag system is fully disarmed before any work is undertaken.

Other common practices, such as disconnecting the battery, may be part of the manufacturer's disarming procedure, but they are not always comprehensive enough on their own to ensure safety. Therefore, relying solely on disconnecting the battery cables is not sufficient. Leaving the system armed introduces a high risk of accidental deployment during servicing, which can result in serious injuries.