Introduction

INTRODUCTION

The Central Body Electronics (ZKE III) equipped on the X5 includes the following sub- Systems under the total scope of its control:
- Windshield/tailgate wiping/washing, including windshield rain sensor (A/C).
- Power windows/Sunroof
- DWA alarm system
- Interior lighting
- Mirror - adjustment/memory/heating
- Central locking
- Seat adjustment/memory
- Keyless entry
- Steering column adjustment/memory
- Tailgate release
- Consumer cut-off/sleep mode

The following is an overview of new or changed features found on the X5 ZKE III variant.
- Passenger's door module is now incorporated into the passenger's door switch block module.
- Sunroof module (SHD) located on the K bus.
- The Central Locking system uses a new style door lock actuator with hall effect sensors similar to E46.
- The GM III is responsible for the Key Memory feature. It provides the added convenience of identifying users of the vehicle. Whenever the vehicle is locked or unlocked via the FZV keyless entry system, a unique key identification signal (key number) is transmitted to the General Module.

The key identification signal alerts the GM to communicate with other control systems over the K Bus to store (when locked) or reset (when unlocked) certain driver adjustable settings for the driver using the specific key. The GM also resets certain driver adjustable settings that it controls directly.

The X5 ZKE III system continues to be a modular system consisting of the following:
- General Module III; main controller for ZKE functions
- PM - FT/SB; Driver's door switch block and door module
- PM - BT/SB; Passenger's door module
- PM - SHD; Sunroof module
- PM - SM; Seat/Mirror/Steering Column memory module
- AIC; Rain Sensor







All of these modules communicate over the K-Bus and P-Bus for signaling purposes and diagnosis. The ZKE II continues to utilize power transistors for final stage output control.