2000 LEXUS GS400 engine

BE0G7±07
START
Insert the key in the key cylinder.
Under registration
Registration completion
Remove the key.
Will you register the
next key?
NoSecurity indicator blinks until the first
key is inserted. The indicator light
lights up after the key registration.
Security Indicator ON
Security Indicator
OFF
END Ye s
Security Indicator ON
(After the last key (sub±key)
has been registered, the indi-
cator goes off.)
BE±238
± BODY ELECTRICALENGINE IMMOBILISER SYSTEM
2539 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
ENGINE IMMOBILISER SYSTEM
REGISTRATION PROCEDURE
1. KEY REGISTRATION IN AUTOMATIC REGISTRATION MODE
(a) Registration of a new transponder key.
HINT:

This must be done when you install a new ECM.

The new ECM is in the automatic key code registration mode. The already fixed number of key codes
for this ECM can be registered.
On this type of vehicle, up to 3 key codes can be registered.

In the automatic registration mode, the key registered last becomes the sub±key.

1.2 Sec.
0.8 Sec.
0.25 Sec. 0.5 Sec.0.25 Sec.
1 Sec. Blinks
Code 2±1 Code2±2
0.25 Sec.
0.25 Sec.0.5 Sec. 1 Sec.
± BODY ELECTRICALENGINE IMMOBILISER SYSTEM
BE±239
2540 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
HINT:

When a key is not inserted in the key cylinder in the automatic registration mode, the security indicator
always lights on.

When the immobiliser system operates normally and the key is pulled out, the security indicator blinks.

When key code registration could not be performed in the automatic registration mode, code 2±1 is
output from the security indicator and when inserting the already registered key, code 2±2 is output.
(b) Automatic registration mode completion
If completing the mode forcibly when more than 1 key code have been registered in the automatic reg-
istration mode, perform the following procedures.
After 1 more key code have been registered with master key, perform step (1) or (2) without pulling
the key out or inserting the already registered key.
(1) Depress and release brake pedal 5 times or more within 15 sec.
(2) With the LEXUS hand±held tester, require automatic registration mode completion.

I04311
I04312
BE±240
± BODY ELECTRICALENGINE IMMOBILISER SYSTEM
2541 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
2. KEY REGISTRATION PROCEDURE WHEN KEY OR KEY CYLINDER HAS BEEN REPLACED.
HINT:
Key registration procedure of new master key and new sub±key on this vehicle when new ignition cylinder
and key set, and new lock cylinder set including ignition key cylinder are installed is described below.
(a) Removing wire±less and immobiliser module from origi-
nal master key.
(b) Making new master key.
After replacing and installing new ignition cylinder, install
the removed original modules into new 2 key housings as
supply parts.
(c) Registration of supplied new sub±key and /or master key
Register supplied new sub±key and /or master key by us-
ing new master key.
(See step 3 and 4)
NOTICE:
In case of replacing ignition cylinder and key set, door
locks cannot be opened with new ignition keys. Therefore,
to avoid any trouble caused by empty battery of transmitter
of new ignition key, please bring the original key while driv-
ing.

Will you register the
next key?
No Ye s
Insert already registered master key in the key
cylinder
Depress and release the acceleration pedal 5
times.
Depress and release the brake pedal 6 times,
and remove the master key.
Insert key to be registered in key cylinder.
Depress and release the acceleration pedal 1
time. (Security indicator blinks.)
The registration mode completes when pulling
out the key and depressing and releasing the
brake pedal once or more within 10 secs. after
indicator has been OFF or 10 sec. have passed. Within 10 sec.Within 15 sec.
Within 20 sec.
Within 10 sec.
Within 10 sec.
After 60 sec. additional master key is registered.
(Security indicator is OFF.)
± BODY ELECTRICALENGINE IMMOBILISER SYSTEM
BE±241
2542 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(d) There are 2 ways for registration of additional master key, one way is depressing brake pedal and ac-
celeration pedal and the other way is using LEXUS hand±held tester.
HINT:

It is possible to register up to 7 master key codes including the already registered key code.

When any operation time described below is over, registration mode completes.

When the next procedure is performed while the timer is working, the timer completes counting time,
then next timer starts.

When replacing ºIgnition Cylinder Key Setº or ºLock Cylinder Setº register according to the following
procedure using the original master key. However, after the registration of the additional master key,
as the original master key and the original sub±key are not necessary any more, erase registered of
those key codes.
(1) Depressing brake pedal and acceleration pedal:

Will you register the
next key?
Insert already registered master key in the key cylinder.
Using LEXUS hand±held tester select master key regis-
tration.
Remove the master key.
Insert key to be registered in key cylinder.
(Security indicator blinks.)
After 60 sec., additional master key is registered.
(Security indicator OFF.)
No Ye s Within
10 sec.Within 120 sec.
Within 20 sec.
Within 10 sec.
The registration mode completes when pulling
out the key and depressing and releasing the
brake pedal once or more within 10 secs. after
indicator has been OFF or 10 sec. have passed.
BE±242
± BODY ELECTRICALENGINE IMMOBILISER SYSTEM
2543 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(2) Using LEXUS hand±held tester:

Will you register the
next key?
No Ye s
Insert already registered master key in the key
cylinder
Depress and release the acceleration pedal 4
times.
Depress and release the brake pedal 5 times,
and remove the master key.
Insert key to be registered in key cylinder.
Depress and release the acceleration pedal 1
time. (Security indicator blinks.)
Within 10 sec.Within 15 sec.
Within 20 sec.
Within 10 sec.
Within 10 sec.
After 60 sec. additional sub±key is registered.
(Security indicator is OFF.)
The registration mode completes when pulling
out the key and depressing and releasing the
brake pedal once or more within 10 secs. after
indicator has been OFF or 10 sec. have passed.
± BODY ELECTRICALENGINE IMMOBILISER SYSTEM
BE±243
2544 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
3. REGISTRATION OF ADDITIONAL SUB±KEY
There are 2 ways for registration of additional sub±key, one way is depressing brake pedal and acceleration
pedal and the other way is using LEXUS hand±held tester.
HINT:

It is possible to register up to 3 sub±key codes including the already registered key code.

When any operation time described below is over, registration mode completes.

When the next procedure is performed while the timer is working, the timer completes counting time,
then next timer starts.
(1) Depressing brake pedal and acceleration pedal:

Will you register the
next key?
Insert already registered master key in the key cylinder.
Using LEXUS hand±held tester select sub±key registra-
tion.
Remove the master key.
Insert key to be registered in key cylinder.
(Security indicator blinks.)
After 60 sec., additional sub±key is registered.
(Security indicator OFF.)
No Ye s Within
10 sec.Within 120 sec.
Within 20 sec.
Within 10 sec.
The registration mode completes when pulling
out the key and depressing and releasing the
brake pedal once or more within 10 secs. after
indicator has been OFF or 10 sec. have passed.
BE±244
± BODY ELECTRICALENGINE IMMOBILISER SYSTEM
2545 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(2) Using LEXUS hand±held tester:

1. Insert master key in the key cylinder.
2. Depress and release the acceleration pedal 6 times.
3. Depress and release the brake pedal 7 times.
4. Remove the master key.
HINT:
If the key cannot be pulled out within 30 sec. from the first brake
depression in the step 3, the key code deletion is canceled.(Key code erased)
Within 15 sec.
Within 20 sec.
Within 10 sec.
END
5. Leave the vehicle more than 20 sec. without any
operation.
± BODY ELECTRICALENGINE IMMOBILISER SYSTEM
BE±245
2546 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
4. ERASURE OF TRANSPONDER KEY CODE
There are 2 ways for erasure of transponder key code, one way is depressing brake pedal and acceleration
pedal and the other way is using LEXUS hand±held tester.
NOTICE:
Delete all other master and sub±key codes leaving the master key code to use the operation. When
using the key which was used before deletion, it is necessary to register the code again.
HINT:

When any operation time described below is over, registration mode completes.

When the next procedure is performed while the timer is working, the timer completes counting time,
then next timer starts.
(1) Depressing brake pedal and acceleration pedal: