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
© 2002 Directed Electronics, Inc. Vista, CA
N555X 10/02

© 2002 Directed Electronics, Inc. Vista, CA
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
.