Switch Operation

Each Passive entry (PE) outside front door handle has three switches.
Those three switches are each powered by and provide a direct input to the integrated circuit of the respective door handle.
The integrated circuit of each PE outside front door handle receives power from the Radio Frequency Hub Module (RFH) on a signal circuit, and a clean ground from the RFH on a return circuit.
The integrated circuit and the RFH communicate with each other by modulating the current in the signal circuit.
The inputs from those three switches and the handle logic circuit allow each handle to send the RFH up to four different signals: Unlock Request, Hall, Lock Request and Error.
The RFH determines the system response based upon the inputs it receives from each handle as well as the inputs it receives through the authentication process with each detected FOB.