Final answer:
Initiating the inspection with a visual examination enables the technician to quickly identify and address visible issues related to a vacuum leak, facilitating a systematic approach to troubleshooting and resolving the problem
Step-by-step explanation:
If the check engine light is on for a vacuum leak, a technician would typically perform a visual inspection first. A visual inspection involves examining the components and connections associated with the vacuum system without disassembling them. The technician looks for visible signs of damage, loose connections, or deteriorated hoses that could be causing the vacuum leak.
Performing a visual inspection allows the technician to quickly identify obvious issues and assess the overall condition of the vacuum system. If visible problems are found during the visual inspection, further steps may be taken, such as a more detailed mechanical inspection (option C). However, starting with a visual inspection is a practical and efficient way to initiate the diagnostic process.