Lexus GS300/400 (2000 year). Manual — part 74

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–245

2546

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

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BODY ELECTRICAL

ENGINE IMMOBILISER SYSTEM

2547

(2)

Using LEXUS hand–held tester:

BE02Q–15

I01376

ECM

Transponder Key Coil

Driver Side Junction Block

IGN Fuse

Transponder Key Amplifier

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BODY ELECTRICAL

ENGINE IMMOBILISER SYSTEM

BE–247

2548

LOCATION

The vehicle shown in this illustration is ”GS400”.

All components of ”GS300” other than the ones used for engine are same as ”GS400”.

BE0G8–09

I04266

1

2

BE–248

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BODY ELECTRICAL

ENGINE IMMOBILISER SYSTEM

2549

INSPECTION

INSPECTION TRANSPONDER KEY COIL CONTINUITY
Check that continuity exists between terminals 1 and 2.
If continuity is not as specified, replace the coil.