Directed Electronics 555X User manual

555X Lexus Immobilizer

Bypass Module

■Lexus GS300: 2002

The Lexus Immobilizer anti-theft system uses a low-power

transponder mounted in the head of the ignition key. When the

vehicle is started, the Key Cylinder Module converts the transpon-

der signal and sends a secure, coded signal to the Engine Control

Module. If the signal to the Engine Control Module is correct, the

vehicle will start.

The 555X uses a unique autoprogram sequence to learn the secure

code from the Key Cylinder Module and repeats it when remote start

is activated, eliminating the need to leave a key in the vehicle.

The 555X Lexus Immobilizer Bypass Module integrates into the

wiring for the Lexus immobilizer anti-theft system to allow remote

start capability, while still allowing normal function of the factory

immobilizer anti-theft system.

WARNING! It is recommended that the 555X Immobilizer

Bypass Module only be installed by an authorized Directed

dealer. Attempting installation without the proper tools and

training can result in damage to the vehicle electronics.

IMPORTANT! Wire connections from the 555X to the Lexus

immobilizer wires should be done AFTER all remote start

connections are completed and the following test is suc-

cessful.

After completing all remote start wiring connections, insert the

vehicle key into the ignition switch. Do NOT turn the ignition on.

Activate the remote start.

If the vehicle remote starts, proceed with the 555X installation. If

the vehicle fails to start, check all ignition and tachometer con-

nections and retest. Do NOT proceed with 555X installation until

this test is successful.

Pre-Installation Test

Product Description

Models

A successful test verifies that all ignition and tachometer con-

nections are correct. This will eliminate the remote start as the

cause of a failure to start after completing the 555X installation.

1. Remove steering column shroud to gain access to the wire

harnesses at the rear of the ignition switch.

2. Locate the appropriate wires exiting the ignition switch and

immobilizer receiver. The wire colors are listed in the

Application Guide.

3. Wire the 555X as shown in the wiring diagram.

■GREEN: Connect this wire to the (-) key sense wire at the

ignition cylinder. The key sense wire rests at ground when the

key is inserted into the ignition switch.

■BLACK: Connect this wire to a quality chassis ground (prefer-

ably scraped sheet metal) separate from other component

ground locations.

■BLUE: Connect this wire to the BLUE status output of the

remote start. It must see ground during remote start.

■RED: Connect this wire to a constant (+)12 volt source.

■YELLOW: Locate the Data wire listed in the Application Guide

and cut it. Connect this wire to the end of the Data wire that

is coming from the ignition switch.

■YELLOW/BLACK: Connect this wire to the end of the Data wire

that goes toward the ECM side.

IMPORTANT! Signals on the immobilizer wires are Data,

not voltage. They can't be tested with conventional test

equipment. All connections should be made using solder

and tape to avoid any signal loss due to resistance in the

connections. Quick connects are unacceptable!

■VIOLET: Connect this wire to the keyside of the clock wire.

■VIOLET/BLACK: Connect this wire to the clock wire’s ECM side.

■BROWN: Connect this wire to the Synch wire listed in the

Application Guide.

Wire Connection Guide

Installation Instructions

N555X 10/02

RED

BROWN

BLUE

BLACK

GREEN

VIOLET

YELLOW

YELLOW/BLACK

VIOLET/BLACK

1. Insert the vehicle key into the ignition cylinder. DO NOT turn

it on.

2. Activate the remote start. The 555X LED will turn on when

ground is received on the BLUE (-) activation wire indicating

entry into the learn routine.

3. When the vehicle remote starts, the LED will turn off to indi-

cate the key code was successfully learned.

4. Shut down the remote start and remove the key from the

ignition cylinder.

5. Activate the remote start. The vehicle will start and run at

this time.

For most Lexus applications the wires below should be found at

the steering column for easy access. If the wires are not available

or are different colors check the chart below.

NOTE: The factory BLACK ignition key must be used for

programming; the GRAY key will not work.

BLACK Ground

RED 12V Constant

WHITE/YELLOW Synch Wire

WHITE Clock Wire

WHITE/BLUE Data Wire

Application ChartProgramming Instructions

Vehicle SYNCH CLOCK DATA IGNITION GROUND KEY SENSE

01 LX470 RED/YELLOW VIOLET/GREEN BLUE/BLACK BLACK/YELLOW WHITE/BLACK

Highlander GRAY PINK GRAY/BLUE WHITE WHITE/BLACK

01 4-runner PINK/BLACK RED/BLACK GRAY/RED WHITE/BLUE BROWN YELLOW/RED

01-02 Sienna BROWN/YELLOW BROWN/RED BROWN/WHITE BLACK/RED WHITE/BLACK BLUE/BLACK

01-02 RX-300 GRAY PINK PURPLE BLACK/RED WHITE/BLACK

01-02 RAV 4 YELLOW/BLACK YELLOW YELLOW/GREEN BLACK/RED WHITE/BLACK BLUE/BLACK

01-02 Sequoia YELLOW/GREEN 01 BLUE/GREEN 02 LT.GREEN RED/YELLOW BLACK/RED ORANGE

02-IS-300 PINK/BLACK PURPLE GREEN/BLACK BLACK/RED WHITE/BLACK

01 CAMRY BLUE/YELLOW RED/BLUE GREEN/WHITE BLACK/YELLOW WHITE/BLACK BLUE

02 CAMRY BLUE/YELLOW RED/BLUE GREEN/WHITE BLACK/RED WHITE/BLACK BLUE

02 SOLARA BLUE/YELLOW RED/BLUE GREEN/WHITE RED WHITE/BLACK

01 AVALON BLUE/YELLOW BLUE/ORANGE PINK/GREEN BLACK/WHITE WHITE/BLACK RED/YELLOW

02 ES 300 BLUE/YELLOW RED/BLUE GREEN/WHITE BLACK/RED WHITE/BLACK

99+ GS 300 BLUE/RED BLACK/WHITE GREEN/ BLACK BLACK/RED WHITE/BLACK YELLOW

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