Lexus IS250 IS220d GSE20 ALE20 - THEFT DETERRENT

THEFT DETERRENT SYSTEM (w/o Intrusion Sensor) - ON-VEHICLE INSPECTION

1. OUTLINE OF THEFT DETERRENT SYSTEM

When the theft deterrent system detects that the vehicle is being tampered with, the system sets off the alarm, causing the horns to sound and the lights to light up or blink in order to alert people around the vehicle to the theft.

Each mode has 4 states; a disarmed state, an arming preparation state, an armed state and an alarm sounding state.

Disarmed state:

The alarm function is not operating.
The theft deterrent system is not operating.

Arming preparation state:

The time until the system goes into the armed state.
The theft deterrent system is not operating.

Armed state:

The theft deterrent system is operating.

Alarm sounding state:

Alarm function is operating.
  • Alarm time:
  • Approx. 30 sec.
Refer to table below for alarm method and time:
Alarm MethodHazard Warning LightBlinking
Interior LightIlluminating
Vehicle HornSounding
(approx. 0.4 second cycles)
Security HornSounding
(approx. 0.4 second cycles)
Alarm TimeApprox. 30 sec.
(Maximum 10 times)
  • HINT:
  • If any of the doors are unlocked when the key is not in the actuation area during the armed state, a forced door lock signal will be output (see FORCED DOOR LOCK CONTROL).
2. ACTIVE ARMING MODE
  • HINT:
Active arming mode starts the alarm control immediately after the doors are locked.
This system activates as described in the diagram below when one of items for each condition is met.

Active arming mode

Theft Deterrent System (W/O Intrusion Sensor) - On-Vehicle Inspection. THEFT DETERRENT. Lexus IS250 IS220d GSE20 ALE20

ConditionItem
Condition (1)In the disarmed state, when the key is not in the actual area, the system state is switched if the following conditions is met.
With all doors, engine hood and luggage compartment door closed, lock all doors by wireless operation.
Condition (2)
Allow approx. 30 sec. to elapse.
Condition (3)
Unlock all doors by wireless operation.
Unlock any door.
Open any door.
Open engine hood.
Open luggage compartment door.
Reconnect battery.
Turn the engine switch from off to on (IG).
Condition (4)
Open engine hood.
Open luggage compartment door.
Reconnect battery.
Open any door.
Unlock any door.
Condition (5)
Unlock all doors by wireless operation.
Turn the engine switch on (IG) and run the engine approx. 2 seconds.
Condition (6)
After approx. 30 sec., alarm stops and system returns to armed state.
3. FORCED DOOR LOCK CONTROL

The forced door lock control prevents the vehicle from being tampered with. Immediately after a door is unlocked (alarm starts), the door is forced to lock by a forced door lock signal.

Conditions that force the doors to lock:


When the key is not in the actuation area and both of the following conditions are met.

The theft deterrent system is in the alarm sounding state of active arming mode.
Any door is unlocked.
4. SECURITY INDICATOR OUTPUT

The main body ECU RH outputs a signal to light up the security indicator, according to the state of the theft deterrent system. However, some of the actual lighting conditions of the security indicator are different from the output signals of the main body ECU RH.

Output
State of Theft Deterrent System*Security Indicator
Output Signals from Main Body ECU RHActual Lighting Condition
Disarmed state 1, 2OFFOFF (Immobiliser system unset)
BLINKING (Immobiliser system set)
Arming preparation stateONON
Armed stateOFFBLINKING
Alarm sounding stateONON
Blinking cycle:
TimeSecurity Indicator
0.2 sec.ON
1.8 sec.OFF
  • HINT:
*: The above condition is common both to active arming mode and to passive arming mode.
When the immobiliser system is set, the security indicator blinks during both the disarmed state and the armed state, due to the output signals from the immobiliser system.
LEXUS IS250, IS220d / GSE20 ALE20
THEFT DETERRENT
Lexus IS250 IS220d GSE20 ALE20
THEFT DETERRENT SYSTEM w/o Intrusion Sensor