Vehicle Security (Theft Warning) System
VEHICLE SECURITY (THEFT WARNING) SYSTEMSystem Description
DESCRIPTION
Operation Flow
Setting the Vehicle Security System
Initial condition
- Ignition switch is in OFF position.
Disarmed phase
- When hood, 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 2.4 seconds.
Pre-armed phase and armed phase
When the following operation 1 or 2 is performed, the vehicle security system turns into the "pre-armed" phase. (The security indicator lamp illuminates.)
1. BCM receives LOCK signal from door key cylinder switch or key fob after hood, trunk lid and all doors are closed.
2. Hood and all doors are closed after 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 to "ON" or "ACC" position.
Activating the Alarm Operation of the Vehicle Security System
Make sure the system is in the armed phase. (The security indicator lamp blinks every 2.4 seconds.)
When the following operation 1 or 2 is performed, the system sounds the horns and flashes the headlamps for about 50 seconds.
1. Hood or any door is opened during armed phase.
2. Disconnecting and connecting the battery connector before canceling armed phase.
Canceling the Alarm Operation of the Vehicle Security System
When one of the following operations is performed, the alarm operation is canceled.
- Unlock the door with the key or key fob.
- Open the trunk lid with the key fob.
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 55.
- through 10 A fuse [No.18, located in the fuse block (J/B)]
- to BCM terminal 42.
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 11.
INITIAL CONDITION TO ACTIVATE THE SYSTEM
The operation of the vehicle security system is controlled by the doors and hood.
To activate the vehicle security system, BCM must receive signals indicating the doors and hood are closed and the doors are locked by key or key fob.
When a door is open, BCM terminal 12 or 62 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 or 7 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 driver side door is unlocked by power window main switch (door lock and unlock switch), BCM terminal 22 receives a signal from terminal 12 of power window main switch.
When passenger side door is unlocked by power window sub-switch (door lock and unlock switch), BCM terminal 22 receives a signal from terminal 16 of power window sub-switch.
When the hood is open, IPDM E/R receives a ground signal
- to IPDM E/R terminal 56
- through hood switch terminal 1
- 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 57 receives a ground signal
- from terminal 1 of the trunk room lamp switch
- through body grounds B402 and B413.
VEHICLE SECURITY SYSTEM ALARM OPERATION
The vehicle security system is triggered by
- opening a driver and passenger side 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 12, 62 (door switch), 57 (trunk room lamp switch) or IPDM E/ R receives a ground signal at terminal 56 (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 38 and 60.
When both headlamp relay (built-in IPDM E/R) and horn relay are energized and then power is supplied to headlamps (high beam and low beam) 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 must be unlocked or trunk lid must be opened with the key or key fob.
When the key is used to unlock a door, BCM terminal 22 receives signal
- from terminal 12 of the power window main switch.
When the BCM receives either above signal 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 38 and 60.
When both headlamp relay (built-in IPDM E/R) and horn relay are energized and then power is supplied to headlamps (high beam and low beam) and horns (HIGH and LOW).
The headlamp flashes and the horn sounds intermittently.
The alarm automatically turns off after 25 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
Refer to "INFORMATION BUS".