Vehicle Security (Theft Warning) System
System DescriptionDESCRIPTION
Operation Flow
Setting the vehicle security system
Initial condition
- Ignition switch is in OFF position.
Disarmed phase
- When the vehicle is being driven or when doors or trunk lid is open the vehicle security system is set in the disarmed phase on the assumption that the owner is inside or near the vehicle.
- When the vehicle security system is in the disarmed phase the security indicator lamp blinks every 2.6 seconds.
Pre-armed phase and armed phase
When the following operation 1 or 2 is performed the vehicle security system turns into the "prearmed" phase. (The security indicator lamp illuminates.)
1. BCM receives LOCK signal from front door key cylinder switch or key fob after hood, trunk lid and all doors are closed.
2. Hood, trunk lid and all doors are closed after front doors are locked by key or door lock and unlock switch. The security indicator lamp illuminates for 30 seconds then, the system automatically shifts into the "armed" phase.
Canceling the set vehicle security system
When one of the following operations is performed, the armed phase is canceled.
1. Unlock the doors with the key or the key fob.
2. Open the trunk lid with the key fob.
3. Turn ignition switch "ON" or "ACC" position.
Canceling the alarm operation of the vehicle security system
When one of the following operations is performed, the alarm operation is canceled.
1. Unlock the door with the key or the key fob.
2. Open the trunk lid with the key fob.
Activating the alarm operation of the vehicle security system
Make sure the system is in the armed phase. (The security indicator lamp brinks every 2.6 seconds.)
When the following operation 1 or 2 is performed, the system sounds the horns and flashes the head-lamps for about 50 seconds.
1. Engine hood, trunk lid or any door is opened during armed phase.
2. Disconnecting and connecting the battery connector before canceling armed phase.
POWER SUPPLY
Power is supplied at all times
- through 10 A fuse [No.19 located in the fuse block (J/B)]
- to security indicator lamp terminal 1.
Power is supplied at all times
- through 50 A fusible link (letter F located in the fuse and fusible link box)
- to BCM terminal 7.
With the ignition switch in the ACC or ON position power is supplied
- through 10 A fuse [No.6 located in the fuse block (J/B)]
- to BCM terminal 36.
INITIAL CONDITION TO ACTIVATE THE SYSTEM
The operation of the vehicle security system is controlled by the doors hood and trunk lid.
To activate the vehicle security system BCM must receive signals indicating the doors hood and trunk lid are closed and the doors are locked by key fob.
When a door is open BCM terminals 10, 11 or 14 receives a ground signal from each door switch. (Applied from without navigation system and with navigation system auxiliary circuit.)
When a door is open combination meter terminal 6-9 receives a ground signal from each door switch. The combination meter then sends a signal to the BCM through the CAN SYSTEM.
(Applied from with navigation system formalities circuit.)
When front door LH is unlocked by power window main switch (door lock and unlock switch) BCM terminal 74 receives a signal from terminal 8 (except with interruption detection function for all door window) or 9 (with interruption detection function for all door window) of power window main switch.
When front door RH is unlocked by power window sub-switch (front passenger side) (door lock and unlock switch) BCM terminal 74 receives a signal from terminal 11 of power window sub-switch.
When the hood is open IPDM E/R receives a ground signal
- from hood switch terminal 2
- to IPDM E/R terminal 51
- through body grounds E17 and E43.
The IPDM E/R then sends a signal to the BCM through the CAN SYSTEM.
When the trunk lid is open BCM terminal 18 receives a ground signal
- from terminal 1 of the trunk room lamp switch
- through body grounds B5 and B29.
VEHICLE SECURITY SYSTEM ALARM OPERATION
The vehicle security system is triggered by
- opening a door
- opening the trunk lid
- opening the hood
- detection of battery disconnect and connect.
The vehicle security system will be triggered once the system is in armed phase
When BCM receives a ground signal at terminals 10, 11, 14 receives a signal from the combination meter (door switch) 18 (trunk room lamp switch) or receives a signal from the IPDM E/R (hood switch).
Power is supplied at all times
- to horn relay terminal 2
- through 15 A fuse (No.35 located in fuse and fusible link box).
When the vehicle security system is triggered ground is supplied intermittently from IPDM E/R terminals 14 and 45.
When headlamp relay (with built-in IPDM E/R) and horn relay are energized and then power is supplied to headlamps (LH and RH) and horns (HIGH and LOW).
The headlamps flash and the horn sounds intermittently.
The alarm automatically turns off after 50 seconds but will reactivate if the vehicle is tampered with again.
VEHICLE SECURITY SYSTEM DEACTIVATION
To deactivate the vehicle security system a door or the trunk lid must be unlocked with the key or key fob.
When the key is used to unlock a door BCM terminal 74 receives signal ^ from terminal 14 of the main power window and door lock and unlock switch.
When the BCM receives either one of these signals or unlock signal from key fob the vehicle security system is deactivated. (Disarmed phase)
PANIC ALARM OPERATION
Remote keyless entry system may or may not operate vehicle security system (horn and headlamps) as required.
When the remote keyless entry system is triggered ground is supplied intermittently from IPDM E/R terminals 14 and 45.
When headlamp relay (with built-in IPDM E/R) and horn relay are energized and then power is supplied to headlamps (LH and RH) and horns (HIGH and LOW).
The headlamp flashes and the horn sounds intermittently.
The alarm automatically turns off after 30 seconds or when BCM receives any signal from key fob.
CAN Communication System Description
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle and each control unit shares information and links with other control units during operation (not independent). In CAN communication control units are connected with 2 communication lines (CAN H line CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN COMMUNICATION UNIT
TYPE 1
System diagram
TYPE 2
System diagram