In this guide book has been included the information of the Car Access System and its purpose, components and then after studying this guide book you will able to Recognize the functions that are performed by the CAS, Describe how the CAS is responsible for the Terminal status of the vehicle, Identify the “keys” that should be delivered with the vehicle, Explain how the CAS accepts and ejects the remote control, Describe the EWS function of the CAS, Understand the procedure required when replacing the CAS.