engine LEXUS GS400 2000 Service Workshop Manual

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:

1. Insert master key in the key cylinder.
2. Require key code deletion from hand±held tester.
(Security indicator blinks)
3. Remove the master key.
HINT:
When the key cannot be pulled out in the step 3, key code deletion is canceled.
(Security indicator is OFF.) END
(Key code erased.)
Within 120 sec.
Within 10 sec.
BE±246
± BODY ELECTRICALENGINE IMMOBILISER SYSTEM
2547 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(2) Using LEXUS hand±held tester:

BE02Q±15
I01376
ECM
Transponder Key Coil
Driver Side Junction Block

IGN Fuse Transponder Key Amplifier
± BODY ELECTRICALENGINE IMMOBILISER SYSTEM
BE±247
2548 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
LOCATION
The vehicle shown in this illustration is ºGS400º.
All components of ºGS300º other than the ones used for engine are same as ºGS400º.

BE0G8±09
I04266
1 2
BE±248
± BODY ELECTRICALENGINE IMMOBILISER SYSTEM
2549 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
INSPECTION TRANSPONDER KEY COIL CONTINUITY
Check that continuity exists between terminals 1 and 2.
If continuity is not as specified, replace the coil.

BE0FY±09
I01377
Horn
Horn Switch Engine Room No.1
Junction Block

HORN Fuse
Theft Deterrent Horn
Engine Room No.2
Junction Block

Horn Relay
± BODY ELECTRICALHORN SYSTEM
BE±249
2550 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
HORN SYSTEM
LOCATION
The vehicle shown in this illustration is ºGS400º.
All components of ºGS300º other than the ones used for engine are same as ºGS400º.