Lexus LS400 (2000 year). Service manual — part 45

Will you register the
next key?

No

Yes

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 sec. after in-
dicator has been off or 10 sec. have passed.

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BODY ELECTRICAL

ENGINE IMMOBILISER SYSTEM

BE–249

2112

4.

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 master key is registered.
(Security indicator OFF)

No

Yes

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 sec. after in-
dicator has been off or 10 sec. have passed.

BE–250

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BODY ELECTRICAL

ENGINE IMMOBILISER SYSTEM

2113

(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.

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BODY ELECTRICAL

ENGINE IMMOBILISER SYSTEM

BE–251

2114

5.

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–252

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BODY ELECTRICAL

ENGINE IMMOBILISER SYSTEM

2115

(2)

Using LEXUS hand–held tester: