ALPS ALPINE WB1G0169 user manual

CONTENTS

1. PREFACE

2. PASSSIVE ACCSESS ENTRY FUNCTIONALITY

2.1. Door Unlocking

2.2. Engine Start

2.3. Engine Stop

2.4. Door Locking (Push switch)

3. ACTIVE ACCESS ENTRY FUNCTIONALITY

3.1. Door Unlocking

3.2. Engine Start

3.3. Engine Stop

3.4. Door Locking

Lid Open

3.5.

4. ENTRY SYSTEM OPTIONS

4.1. System Schematic

4.2. Modules

4.2.1. FOB ECU

4.2.2. Entry System ECU

5. SYSTEM CHARACTERISTICS

5.1. Antenna Areas

5.2. Exciter Locations

5.3. Switch Input Locations (Door handle)

6. ELECTRICAL CHARACTERISTICS

6.1. FOB

6.2. Entry System ECU

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)
 Lid open (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
 Lid open
 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)

W

2.Passsive Accsess Entry Functionality

A handle sw 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.

Door Handle S

Figure 1

2.1.Door Unlocking

 User pushes door handle sw.
 ECU sends LF-challenge via exterior antenna.
 FOB sends RF-response to the ECU.
 Door unlocking status is engaged.
 Doors are opened.

LF

Figure 2

RF

FOB

2.2.Engine Start

 User operates the engine start 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 operates the engine stop knob.
 ECU communicates with the other ECU for engine start request.
 Engine controller ECU receives the request.
 Stop the engine

Figure 4