Diesel Data: Automotive Repair

Theft Deterrent System















THEFT DETERRENT: THEFT DETERRENT SYSTEM: SYSTEM DIAGRAM

SYSTEM DIAGRAM





THEFT DETERRENT: THEFT DETERRENT SYSTEM: SYSTEM DESCRIPTION

SYSTEM DESCRIPTION

1. OUTLINE OF THEFT DETERRENT SYSTEM
(a) When any attempt is made to forcibly enter the vehicle, open the engine hood or unlock any door without using a key, or when the battery terminals are disconnected and then reconnected, this system causes the vehicle horn and security horn to sound, the interior light to light up, and the hazard warning lights, taillights and headlights to flash, in order to deter break-in and theft.
(b) The theft deterrent system has two arming modes; Active and Passive. Active arming mode allows the theft deterrent system to activate normally. Passive arming mode is used for the servicing. The Techstream allows the theft deterrent system to switch between Active and Passive.
Theft Deterrent System
(c) Each mode has 4 states; a disarmed state, an arming preparation state, an armed state and an alarm sounding state.
(1) Disarmed state:

- The alarm function is not operating.
- The theft deterrent system is not operating.
(2) Arming preparation state:

- The state before the system goes into the armed state.
- The theft deterrent system is not operating.
(3) Armed state:

- The theft deterrent system is operating.
(4) Alarm sounding state:

- The alarm function is operating.
Alarm time:
Approximately 57 seconds.

Alarm form manifestation and duration:





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 item for each condition is met.

(a) Active arming mode





Hatchback:





HINT: *: When the driver door or passenger door key cylinder is turned to the lock position using a key with all the doors locked and the engine hood closed, the system enters the arming preparation state. However, the system does not enter the arming preparation state when the back door lock key cylinder is turned to the lock position.

Sedan:





*: Only for vehicles with transmitter.
3. PASSIVE ARMING MODE
Passive arming mode can be switched ON and OFF using the specified method. The theft deterrent system is initially set to active arming mode when vehicles are shipped from factories.
HINT:
- Passive arming mode starts the alarm control after the key is removed from the ignition key cylinder and the doors are closed.
- During passive arming mode, the theft deterrent system goes into the armed state even if the doors are not locked.
- Even if the theft deterrent system detects that a door is opened during passive arming mode, the system does not go into the alarm sounding state immediately because an entry delay time is set.
- If either of the following conditions is met during passive arming mode, the theft deterrent system switches to active arming mode.

- With all the doors and the engine hood closed, all the doors are locked by the key operation.
- With the engine hood closed and all the doors locked with any door still open, the open door is closed.
- This system activates as described in the diagram below when one item for each condition is met.

(a) Passive arming mode




- *1: Disarmed state (1) is the normal disarmed state.
- *2: Disarmed state (2) is set from either the disarmed state (1) or the arming preparation state.
HINT: The terms "all doors", "any door" and "door" below include the back door.

Hatchback:





HINT: *: System does not return to disarmed state if the back door key cylinder is turned to the unlock position using a key.




- *1: Disarmed state (1) is the normal disarmed state.
- *2: Disarmed state (2) is set from either the disarmed state (1) or the arming preparation state.

SEDAN:





*1: Only for vehicles with transmitter.
*2: System does not return to disarmed state if the luggage compartment door key cylinder is turned to the unlock position using a key.
4. ALARM MEMORY FUNCTION
(a) If the alarm is set off (tampering is detected) while the theft deterrent system is armed, the alarm memory function records it. Whenever the theft deterrent system is canceled, the alarm memory function causes the taillights to light up for 2 seconds in order to indicate that the alarm has been set off.
(1) Conditions of the alarm memory function that cause the taillights to light up:
When the theft deterrent system has entered the alarm sounding state (tampering has been detected), the taillights light up for 2 seconds if either of the following conditions is met.

- Switched to the disarmed state from the armed state during active arming mode.
- Switched to the disarmed state (1) from the armed state during passive arming mode.
HINT: Active arming mode: See ACTIVE ARMING MODE.
Passive arming mode: See PASSIVE ARMING MODE.

5. SECURITY INDICATOR OUTPUT
(a) The theft warning ECU 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 theft warning ECU.

Output:





Blinking cycle:





HINT:
- *: The above condition is common to both active arming mode and passive arming mode.
- When the immobiliser system is set, the security indicator blinks in both the disarmed state and the armed state, due to the output signals from the immobiliser system.

6. ENTRY DELAY FUNCTION
(a) When any door is opened while all the doors are closed during passive arming mode, the entry delay time starts. If the switch condition (7) or (8) (see PASSIVE ARMING MODE) is met during the entry delay time, the theft deterrent system will not set off the alarm. However, if the switch condition (7) or (8) is not met, the theft deterrent system will recognize it as a theft and set off the alarm.




HINT: The entry delay time can be selected from among 0, 14, 30 seconds by customizing the setting.