Which of the following does NOT interrupt an OBD II PCM/ECM reprogramming procedure?

The choice indicating that turning on the ignition key does not interrupt an OBD II PCM/ECM reprogramming procedure is correct because the ignition must typically be in the "ON" position to initiate and maintain the reprogramming process. This state enables the PCM/ECM to communicate with the reprogramming equipment and ensures that the necessary power supply is maintained throughout the procedure.

In contrast, other options represent actions that can disrupt the reprogramming sequence. For instance, receiving an automatic virus protection update can cause temporary interruptions in firmware or software that may interfere with the communication necessary for the reprogramming. Opening a door can also lead to an interruption due to the vehicle's security system activating or the system detecting changes that might affect the reprogramming process. Carrying the vehicle's key fob in your pocket could potentially activate the vehicle's systems or security functions inadvertently, which might also interfere with reprogramming.

Maintaining the appropriate environment, such as keeping the ignition on, is essential to ensure that the procedure can be completed without interruptions.