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Document No. Title Page

5AX000XX00 Product Specification

Background

Passive Entry System

FORMAT NO. FIRMWARE_A(VER 0.01)

1. Preface

This document describes the requirements and operation of the Passive Entry System. However, this document

is especially for the Entry system ECU (acronym for Electric Control Unit) and the FOB.

The FOB consists the following functionality for passive access and active access:

• Door unlocking / locking (however, only for request by means of switch operation)

• Trunk unlocking / locking (however, only for request by means of switch operation)

• LF decoding

• RF encoding

• Communication data encryption (cryptograph, anti-collision, rolling code and stuff)

And the entry system ECU consists of the following functionality:

• Door unlocking / locking

• Trunk unlocking / locking

• Engine start (/ stop)

• LF encoding

• RF encoding

• Communication data encryption (cryptograph, anti-collision, rolling code and stuff)

• LF antenna unit control

• Communication with the node ECUs connected to the body bus (e.g. CAN, J1850, customer dependent

bus)

As a further function, both the FOB and the entry system ECU provides the following function:

• Learning mode for programming the manufacturing data and stuff

• Data locking and password protection

• Diagnostic (based upon ISO9141 if required)

Summary of content (11 pages)

PAGE 1
Document No. 5AX000XX00 Title Page Product Specification Background Passive Entry System 1.Preface This document describes the requirements and operation of the Passive Entry System. However, this document is especially for the Entry system ECU (acronym for Electric Control Unit) and the FOB.
PAGE 2
Document No. 5AX000XX00 Title Page Product Specification Background Passive Entry System 2.Passsive Accsess Entry Functionality A proximity sensor located on, for example the door handles, mirrors and trunk lid will be used for proximity check if user is in neighborhood of the vehicle. The switch input will trigger for unlocking and open the doors and trunk. Proximity sensor Switch input (door handle) Figure 1 2.1.
PAGE 3
Document No. 5AX000XX00 Title Page Product Specification Background Passive Entry System 2.2.Engine Start • • • • • • User pushes / operate the engine start button / knob. ECU sends LF-challenge via interior antenna. FOB sends RF-response to the ECU. Immobilizer ECU receives and authorize the response. Engine controller ECU receives the authorization for engine strat. Start the engine. RF LF FOB Figure 3 2.3.Engine Stop • • • • User pushes / operate the engine stop button / knob.
PAGE 4
Document No. Title 5AX000XX00 Page Product Specification Background Passive Entry System 2.4.Door Locking (Push switch) • • • • • • User closes the door and pushes the switch (sensing of door locking switch). ECU sends LF-challenge via exterior antenna. FOB sends RF-response to the ECU. Door locking status is engaged. Doors are locked. (Indicates the door locking status by means of Flasher / Buzzer or stuff) Figure 5 FORMAT NO. FIRMWARE_A(VER 0.
PAGE 5
Document No. Title Page 5AX000XX00 Product Specification Background Passive Entry System 3.Active Access Entry Functionality 3.1.Door Unlocking Same functionality as the current one. 3.2.Engine Start This function does not effect on the active entry system. 3.3.Engine Stop This function does not have influencei on the active entry system. 3.4.Door Locking Same functionality as the current one. FORMAT NO. FIRMWARE_A(VER 0.
PAGE 6
Document No. Title Page 5AX000XX00 Product Specification Background Passive Entry System 4.Entry System Options 4.1.System Schematic OTHER ECUS FOB ENTRY SYSTEM ECU 125kHz LF (>2Kbps) Body Bus ECU3 ECU2 433.92 MHz RF (>4Kbps) ECU1 Local Bus 4.2.Modules 4.2.1.FOB ECU FOB ASIC RF Amp 433.92 MHz Lock Unlock Y 125kHz X Trunk LF Amp Key lock Z Emergency key (Transponder) 4.2.2.Entry System ECU ENTRY SYSTEM ECU MCU FT handle 433.
PAGE 7
Document No. Title 5AX000XX00 Page Product Specification Background Passive Entry System 5.System Characteristics 5.1.Antenna Areas Exterior operating range: Interior operating range: 0.8m to 1.5m Only inside the car Number of the exterior exciters : Number of the interior exciters: max. 5 (min. 2), however, it is depending on the type of the vehicle. 1 (1-Dimmension) or 2 (2-Dimension required) Interior Exterior FT BT Figure 6 Exterior antenna functionality: • Unlock / lock doors and trunk.
PAGE 8
Document No. Title 5AX000XX00 Page Product Specification Background Passive Entry System 5.2.Exciter Locations Exterior exciters: Interior exciters: 2 doors and 1 trunk 1 driver’s sheet 2 column / shift lever (X-Y 2-Dimension) Interior Exterior FT BT Figure 7 Antenna location can be different among of type of the vehicle (e.g. coupe, sedan, mini and stuff). FORMAT NO. FIRMWARE_A(VER 0.
PAGE 9
Document No. Title 5AX000XX00 Page Product Specification Background Passive Entry System 5.3.Switch Input Locations (Door handle, Touch sensor) There are some kind of sensors, for instance the door handle contact switch and touch sensor, will be used as a triggering for unlocking and open the door. Switch inputs: 2 doors and 1 trunk FT BT Figure 8 Switch inputs can be different among of type of the vehicle (e.g. coupe, sedan, mini and stuff). FORMAT NO. FIRMWARE_A(VER 0.
PAGE 10
Document No. Title 5AX000XX00 Page Product Specification Background Passive Entry System 6.Electrical Characteristics 6.1.FOB • • • • • • ASK / FSK modulation Operating supply voltage Operating supply current Stand-by current Operating ambient temperature Antenna direction 2.1V to 4.0V (3.0V Battery) < 7mA < 10.0uA o o -20 C to +60 C 3-Dimension (X, Y, Z), to be considered • Battery life 2 Years (Low battery indication is considered) 6.2.
PAGE 11
Document No. Title 5AX000XX00 Page Product Specification Background Passive Entry System FCC WARNING Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. NOTICE This device complies with Part 15 of the FCC Rules.