In what way does the judicial branch check the powers of the executive branch?

The judicial branch checks the powers of the executive branch by overseeing the laws and checking the executive branches actions this way. The judicial branch is appointed by the executive branch for life and is therefore no longer under the control of the executive branch after appointment. The courts can then check the actions of the executive branch through judicial review to determine if their actions are constitutional or not. Therefore, the judicial branch has the ability to check the executive by upholding the American Constitution.