DEG Inquiry 41155 provides MOTOR feedback regarding high voltage monitoring and high voltage verification:

“After review, “isolate High Voltage Battery” should not be assumed to be the same operation as “Deactivate/Activate High Voltage System” unless supported by the applicable OEM procedure. MOTOR’s Guide to Estimating advises following OEM safety precautions and OEM service repair information when disabling the high voltage electrical system before repairs. Any additional OEM required isolation checks, voltage verification, or repeated monitoring during repairs should be considered through an on-the-spot evaluation.”

Additional DEG Note: Always reference OEM procedures for high voltage instructions & requirements.