Lexus RX300 (MCU15). Service manual — part 303

DI612–03

THEFT DETERRENT SYSTEM Check Sheet

Inspector’s name:

Customer’s Name

Date Vehicle

Registration No.

Registration Year

Frame No.

Odometer Reading

/ /

km
Mile

Weather Conditions
When Problem
Occurred

Frequency Problem Occurs

Weather

Outdoor temperature

/ /

j

Constant j Sometimes ( Times per day, month)

j

Once only

Brought in

j

Theft deterrent system cannot be set.

j

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

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

j

Theft deterrent system

does not operate.

j

When unlocked using the

door lock knob.
j

When the engine hood is

opened.

j

System cannot be

canceled once set.

j

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

j

System cannot be

canceled during warning
operation.

j

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

j

Others.

Date Problem First Occurred

j

Fine j Cloudy j Rainy j Snowy

j

Various/Others

j

Hot j Warm j Cool

j

Cold (Approx. °F ( °C))

Problem Symptom

Malfunction
j

Horns only

j

Self power siren only

j

Hazard warning light only

j

Room light only

j

Door lock operation only

DI–444

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DIAGNOSTICS

THEFT DETERRENT SYSTEM

LEXUS RX300 (RM785E)

CUSTOMER PROBLEM ANALYSIS CHECK

DI613–02

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DIAGNOSTICS

THEFT DETERRENT SYSTEM

DI–445

LEXUS RX300 (RM785E)

PRE–CHECK

1.

OUT LINE OF THEFT DETERRENT SYSTEM

When the theft deterrent system detects any theft, it informs
people around with flashing lights and sound.
The performance of the theft deterrent system has been im-
proved by adding the lights (HAZARDS) to the existing system.
2.

PARTIAL CHANGE OF SYSTEM SETTING METHOD

There are 4 conditions in this system which are disarmed state,
arming preparation, armed state and alarm sounding.

(1)

Disarmed state

S

When the alarming function does not oper-
ate.

S

When theft deterrent function is not per-
formed.

(2)

Arming preparation

S

Time until transferring to armed state.

S

Theft deterrent function is not performed.

(3)

Armed state
When theft deterrent function is possible.

(4)

Alarm sounding:
In this condition, once theft is detected, it is in-
formed using light and sound to people around the
vehicle.
Refer to the table for alarming method or time.

Horn

Alarming method

Self power siren

g

Room light

Alarming time

27.5 seconds

Alarming output

(Except room light flashing)

Continuous 0.25 secs.: (ON)

0.25 secs.: (OFF)

HINT:
Alarming output for hazard is same as the one for the hazard
on the vehicle.
In the arming condition when either of doors is unlocked with
key not in the key cylinder, force lock signal is output.

Disarmed state

Perform any of the following and the system will go no to ”Arming preparation”:
D With all doors and engine hood closed, lock all doors with the wireless remote.

Arming preparation

Perform the following and the system will
go on to ”Armed state”:
D Let 30 seconds elapse with all the doors
and engine hood closed and locked.

Perform any of the following and the system
will return to ”Disarmed state”:
D Open any of the doors or engine hood.
D Unlock any of the doors.
D Put the key in the ignition.
D Reconnect the battery.

(Key not inserted in ignition.)

Alarm sounding

Perform any of the following and the system will
return to ”Disarmed state”:
D Unlock any of the doors open signal input with
the wireless remote.

The security horn sounds and hazard lights
flash for 27.5 seconds.

Armed state

Perform any of the following and
the system will return to
”Disarmed state”:
D Unlock the doors with the wireless
remote.

Perform any of the following and the system will go on
to ”Alarm sounding”:
D Open any of the doors.
D Unlock any of the doors with anything other than the
wireless remote.
D Open the back door with anything other than the wireless
remote.
D Open the engine hood.
D Reconnect the battery.
D Turn the ignition from OFF to ON.
D When the radar sensor detects any movement inside
the vehicle.
D Battery terminal short.

DI–446

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DIAGNOSTICS

THEFT DETERRENT SYSTEM

LEXUS RX300 (RM785E)

3.

ACTIVE ARMING MODE

Alarm sounding

Perform any of the following and the system will
return to ”Disarmed state”:
D Unlock any of the doors open signal input with
the wireless remote.

The security horn sounds and hazard lights
flash for 27.5 seconds.

Armed state

Perform any of the following and
the system will return to
”Disarmed state”:
D Unlock the doors with the wireless
remote.

Perform any of the following and the system will go on
to ”Alarm sounding”:
D Open any of the doors.
D Unlock any of the doors with anything other than the
wireless remote.
D Open the back door with anything other than the wireless
remote.
D Open the engine hood.
D Reconnect the battery.
D Turn the ignition from OFF to ON.
D When the radar sensor detects any movement inside
the vehicle.
D Battery terminal short.

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DIAGNOSTICS

THEFT DETERRENT SYSTEM

DI–447

LEXUS RX300 (RM785E)