Circuit/System Description
WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
Keyless entry transmitters contain a motion sensor. The BCM monitors the type of motion that the keyless entry transmitter is experiencing and if it is a type of motion consistent with a customer starting or unlocking a vehicle then it will allow the requested function. If the BCM detects motion that is considered inconsistent with a customer starting or unlocking a vehicle then it will not allow the requested function. The purpose of this is to try to prevent unwanted detection of the keyless entry data.