Antitheft - Diagnostic Tester Immobilizer Function: Overview

SPECIAL SERVICE TOOLS
SS005-01
REVISED

July 6, 2001

Title:
DIAGNOSTIC TESTER IMMOBILIZER FUNCTIONS

Models:
Applicable ES 330, GS 300, GS 430, GX 470, LS 430, LX 470, RX 330, & SC 430

TSIB REVISION NOTICE:

^ August 26, 2005: The model years for each model have been specifically defined in the "Applicable Vehicles" section. The following vehicles have been added to the "Applicable Vehicles" section: ES 330, GS 300, GS 430, and RX 330. The "Required SSTs" section has been updated.





^ January 9, 2003: GX 470 and LX 470 have been added to Applicable Vehicles. The "Required SSTs" section has been updated to the current version software. Screen flows revised (screen C and D) in Figures 1 shown (screen C and D), 2 (screen C), 3 (screen C), 4 (screen C and G), and 9 (screen A).

^ The information contained in this TSIB supercedes the original SSO05-01. Previous versions of this TSIB should be discarded.

Introduction

The Diagnostic Tester incorporates support for Immobilizer system service. This bulletin covers the following Immobilizer functions available using the Diagnostic Tester:

^ Transponder Key Type
^ Transponder Code Registration
^ Transponder Code Erasure
^ Transponder ECU Reset
^ Transponder ECU Replacement
^ Engine ECU Replacement

NOTE:
The available functions and procedures for the models listed in this TSIB differ slightly from previous models and other Immobilizer systems currently in use on Lexus vehicles.





Warranty Information





Applicable Vehicles

NOTE:
Refer to TIS (Technical Information System) for the most current applicable vehicle information.





Parts Information





Required SSTs

NOTE:
Additional Diagnostic Tester Kits, CAN Interface Modules, Program Cards, or other SSTs may be ordered by calling SPX-OTC at 1-800-933-8335.

Function Description

1. Transponder Key Type

Before any Immobilizer functions are performed, verify the type of transponder key that you are attempting to use for the service operation. Some functions may only be performed with a registered Master Key.

2. Transponder Code Registration

This function allows the registration of additional transponder keys (Master or Sub) using a registered Master Key.

3. Transponder Code Erasure

This function allows the user to erase all the transponder keys except the registered Master Key used during this function.

4. Transponder ECU Reset

This function allows the registration of a new Master Key even if all original Master Keys are lost. Once the Immobilizer system is reset, all previous registered keys will be erased.

5. Transponder ECU Replacement

When the Transponder ECU is replaced, the transponder keys must be registered to the new ECU, auto registration closed, and ECU communication completed.

6. Engine ECU Replacement

When the Engine ECU is replaced, ECU communication must be completed to synchronize an encrypted security code between the engine and Transponder ECUs.