Lexus ES300 (1997 year). Service manual — part 405

DI01Q–01

THEFT DETERRENT SYSTEM Check Sheet

Inspector’s name:

Customer’s Name

Date of Vehicle

Registration No.

Registration Year

Frame No.

Odometer Reading

/ /

km
Mile

Weather Conditions
When Problem
Occurred

Frequency Problem Occurs

Weather

Outdoor temperature

/ /

Constant

Sometimes ( Times per day, month)

Once only

Brought in

Theft deterrent system cannot be set.

Indicator light does not flash when the theft deterrent system is set.

(It stays on or does not light at all.)

Theft deterrent system

does not operate.

When unlocked using the

door lock knob.

When the engine hood is

opened.

System cannot be

canceled once set.

When door is unlocked using key or wireless door lock control system.

When the key is inserted in the ignition key cylinder and turned to ACC or ON

position.
(However, only when the system has never operated)

When the luggage compartment door is opened with the key.

System cannot be

canceled during warning
operation.

When door is unlocked using key or wireless door lock control system.

When the key is inserted in the ignition key cylinder and turned to ACC or ON

position.

Warning operation starts when the system is set and the door or luggage compartment door is opened with

the key.

Others.

Date Problem First Occurred

Fine

Cloudy

Rainy

Snowy

Various/Others

Hot

Warm

Cool

Cold (Approx.

°

F (

°

C))

Problem Symptom

Malfunction

Horns only

Theft deterrent horn only

Headlights only

Taillights only

Starter cut only

Door lock operation only

–

DIAGNOSTICS

THEFT DETERRENT SYSTEM

DI–397

549

1997 LEXUS ES300 (RM511U)

CUSTOMER PROBLEM ANALYSIS CHECK

DI01R–01

I00228

0.2

±

0.05 sec.

0.2

±

0.05 sec.

ON

OFF

Horns Sounding and Lights Flashing
Pattern

0.2

±

0.05 sec.

0.55

±

0.05 sec.

ON

OFF

Output of key lock pattern

(Lo)

(Lo)

(Hi)

(Hi)

DI–398

–

DIAGNOSTICS

THEFT DETERRENT SYSTEM

550

1997 LEXUS ES300 (RM511U)

PRE–CHECK

1.

SETTING THE THEFT DETERRENT MODE

The system will be automatically set to the theft deterrent mode
about 30 seconds after the setting process listed below are per-
formed.
Setting Processes: (do processes (a)

(c) in the order)

(a)

Remove the ignition key from the key cylinder.

(b)

Close all entry points (door, hood and luggage compart-
ment door).

(c)

Use any one of the following methods to lock all the doors
depending on a given condition.
(1)

Use the key to lock the driver–side door (as a result,
all the doors will be locked), or

(2)

Use the remoto control to lock any door (as a result,
all the doors will be locked), or

(3)

If the front right or left door is unlocked when both
the rear doors are already locked, lock and close
the remaining unlocked door by hand (as a result,
all the doors will be locked).

(d)

About 30 seconds after the above process (c), the theft
deterrent mode will automatically start.

HINT:
The closing/locking of all the entry points (doors, hood and lug-
gage) must remain unchanged for about 28 seconds after the
above process (c) is completed and then in about another 2 se-
conds (which is called ”DETECTION TIME”), the system will
start the theft deterrent mode.
2.

THEFT DETERRENT OPERATION

When the system is set to the theft deterrent mode and any of
the following conditions are met, the system sounds the horns
and flashes the headlights and the taillights for about 1 minute.
At the same time, the system disconnects the starter motor cir-
cuit *1 and locks all doors (If all door are not locked at once, the
system repeats door locking operation every 0.55 seconds dur-
ing the one minute alarm time). The system continues to dis-
connect the starter motor circuit after the system is operated un-
til the theft deterrent mode is cancelled.
Condition

(1)

Any of the doors (Including the engine hood and
luggage compartment door) is unlocked or opened
without the key.

(2)

The ignition switch is turned to the ACC or ON posi-
tion without the ignition key.

(3)

The battery terminal is disconnected and recon-
nected. *1

(4)

The system receives panic signal from remote key-
less entry. *2

*1: The theft deterrent mode is activated if the battery is
reconnected after it is disconnected.

I00229

1 ±

0.1 sec.

1

±

0.1 sec.

ON

OFF

Blinking Pattern

–

DIAGNOSTICS

THEFT DETERRENT SYSTEM

DI–399

551

1997 LEXUS ES300 (RM511U)

*2: When ignition key is not inserted in the key cylinder.

3.

CANCELLATION OF THEFT DETERRENT OPERA-
TION OR MODE

The theft deterrent operation of mode can be cancelled when
any of the following conditions is met.

No.

Condition

Cancel of Operation

Cancel of Mode

1

Unlock front door with the key

Effective

Effective

2

Unlock doors with remote keyless entry

Effective

Effective

3

Insert key into ignition key cylinder and turn

it to Acc or ON position

Effective *1

Effective *2

4

About 1 minute passes after theft deterrent

operation begins

Automatic stop *3

–

5

Unlock the luggage compartment door with

the key

Uneffective

Effective *4

6

If the system receives panic signal again

when the system is activated by panic signal

Effective *3

Uneffective

*1: In this case, the starter cut is not cancelled.
*2: This applies only when the theft deterrent operation is
never activated. If the theft deterrent operation is acti-
vated even once, the starter cut is not cancelled.
*3: The system is set to the theft deterrent mode again in
about 2 seconds after the operation stops, if all doors are
closed.
*4: The mode is cancelled only temporarily while the lug-
gage compartment door is open. The system is set to the
theft deterrent mode again in about 2 seconds after the
luggage compartment door is closed.

4.

INDICATOR LIGHT (LED)

The indicator light functions as shown below according to the
system condition in the theft deterrent mode. If remains off in
the initial state.

System Condition

Indicator Light

During set preparation time

ON

When the mode is set

Blinks

When alarm is activated

ON

When is temporally cancelled

OFF

5.

KEEPING POWER SUPPLY FUNCTION IN CASE OF
DOME FUSE OPEN

Even if the dome fuse blows open on the theft deterrent mode,
the system will keep warking on the theft deterrent mode.

N09348

ECU

LEXUS hand–held tester

LEXUS Break–out–box

DI–400

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DIAGNOSTICS

THEFT DETERRENT SYSTEM

552

1997 LEXUS ES300 (RM511U)

6.

ECU DATA MONITOR USING LEXUS HAND–HELD
TESTER

(a)

Hook up the LEXUS hand–held tester to the DLC2.

(b)

Monitor the ECU data by following the prompts on the tes-
ter screen.

HINT:
LEXUS hand–held tester has a ”Snapshot” function which re-
cords the monitored data.
Please refer to the LEXUS hand–held tester operator’s manual
for further datails.