ALPS ELECTRIC Co., LTD CONTENTS 1. PREFACE 2. PASSSIVE ACCSESS ENTRY FUNCTIONALITY 2.1. 2.2. 2.3. 2.4. 3. Door Unlocking Engine Start Engine Stop Door Locking (Push switch) ACTIVE ACCESS ENTRY FUNCTIONALITY 3.1. 3.2. 3.3. 3.4. 4. Door Unlocking Engine Start Engine Stop Door Locking ENTRY SYSTEM OPTIONS 4.1. 4.2. 5. System Schematic Modules 4.2.1. FOB ECU 4.2.2. Entry System ECU SYSTEM CHARACTERISTICS 5.1. 5.2. 5.3. 6.
ALPS ELECTRIC Co., LTD 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.
ALPS ELECTRIC Co., LTD 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 Figure 1 2.1.Door Unlocking • • • • • User pull / touch the door handle (sensing of door handle switch). ECU sends LF-challenge via exterior antenna. FOB sends RF-response to the ECU.
ALPS ELECTRIC Co., LTD 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. ECU communicates with the other ECU for engine start request.
ALPS ELECTRIC Co., LTD 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.
ALPS ELECTRIC Co., LTD 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.
ALPS ELECTRIC Co., LTD 4.Entry System Options 4.1.System Schematic OTHER ECUS FOB ENTRY SYSTEM ECU 125kHz Body Bus ECU3 LF (>2Kbps) ECU2 315MHz ECU1 RF (>4Kbps) Local Bus 4.2.Modules 4.2.1.FOB ECU FOB ASIC RF Amp 315MHz Lock Unlock X Y 125kHz Trunk LF Amp Key lock Z Emergency key (Transponder) 4.2.2.
ALPS ELECTRIC Co., LTD 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 : vehicle. Number of the interior exciters: max. 5 (min. 2), however, it is depending on the type of the 1 (1-Dimmension) or 2 (2-Dimension required) Interior Exterior FT BT Figure 6 Exterior antenna functionality: • Unlock / lock doors and trunk. • Activate / deactivate alarm system.
ALPS ELECTRIC Co., LTD 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).
ALPS ELECTRIC Co., LTD 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).
ALPS ELECTRIC Co., LTD 6.Electrical Characteristics 6.1.FOB • • • • • • ASK / FSK modulation Operating supply voltage Operating supply current Stand-by current Operating ambient temperature Antenna direction • Battery life 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 2 Years (Low battery indication is considered) 6.2.Entry System ECU • • • • • Operating supply voltage Operating supply current Stand-by current Operating ambient temperature 10.
ALPS ELECTRIC Co., LTD 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. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
