Here "turn away" is an idiom that means he no longer obeyed Yahweh. Alternate translation: "stopped obeying Yahweh" or "started to disobey Yahweh" (See: [[rc://en/ta/man/translate/figs-idiom]])
The abstract noun "conspiracy" can be stated as an action. Alternate translation: "conspire against him" or "plot against him" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])