update introduced smarter power management, allowing certain parts of the car to "sleep" while others stay awake, saving battery life in electric vehicles. How to Access the Standard
For a detailed "how-to" without purchasing the standard, these application reports from major transceiver manufacturers are highly regarded: AN-1123: Controller Area Network (CAN) Implementation Guide iso 11898-2 pdf download
The standard defines two logical states: update introduced smarter power management