Functions Of Car Access System

Fig 1: Car Access System

Courtesy of BMW OF NORTH AMERICA, INC.

The Car Access System 2 (CAS2) serves as:

• Ignition Switch/Terminal control
• Master controller for Central Locking, Comfort Access, Power Windows and Sunroof (issues enable command)
• Actuator/Controller of Electronic Steering Lock
• "Key" validation device and Electronic Vehicle Immobilization
• Redundant data storage device for Vehicle Order
• Storage point for Condition Based Service (CBS) data
• Control of KL15 and KL 30g relays
  Fig 2: Identifying Connector Terminal

  Courtesy of BMW OF NORTH AMERICA, INC.