FUNCTION
The theft warning ECU assembly controls the theft deterrent system. If it detects an abnormality in the vehicle based on an activation signal from one of the sensors or switches, it issues a warning by operating the No. 1 room light assembly, No. 2 room light assembly, hazard warning lights, security horn assembly and horn assembly.
The table below describes the operation of the theft deterrent system:
| Function | Operation |
|---|---|
| Remote Arming/Disarming | The theft deterrent system activates and deactivates in accordance with operations of the lock/unlock button on the transmitter. |
| Automatic Arming | If the doors are unlocked through the operation of the unlock button on the transmitter while the system is in the armed state and no doors are opened within 30 seconds, the automatic lock function will relock the doors and activate the theft deterrent system automatically. |
| Shock Sensing | The theft warning ECU assembly has a built-in shock sensing triggering sensor to detect any abnormal vibrations that are applied to the vehicle, and issues an alarm only if a strong impact is applied to the vehicle. Even if the sensor detects a vibration, the system will not issue an alarm under the following conditions:
|
| Starter Cut*2 | During an alarm, the system stops the power to the starter, thus preventing the terminal from being reconnected. |
| History Report | If the theft deterrent system enters the alarm state after the doors are locked by the transmitter, this will be memorized. Then, when the doors are unlocked by the transmitter, the hazard warning lights flash three times to inform the driver of this. |
Tech Tips
*1: This function can be disabled according to user preference. For details, refer to the corresponding Repair Manual for this model.
*2: Models without engine immobiliser system
OPERATION
The states of the theft deterrent system are as follows:
| State | Description | Theft Detection |
|---|---|---|
| Disarmed State | The theft deterrent system has not been set by the user. | Not possible |
| Armed Preparation State | This is the preparation state before the theft deterrent system becomes active (enters the armed state) when the system has been set by the user. | Not possible |
| Armed State | The theft deterrent system is active. (Theft can be detected.) | Possible |
| Alarm State | A theft attempt has been detected and the warning operation activates. | Possible |
| Condition | Item |
|---|---|
| (1) | When the ignition switch is off and the ignition key is not inserted into the ignition key cylinder, the armed preparation state can be switched to via the following operation:
|
| (2) | The armed state will be switched to 30 seconds after switching to the armed preparation state. |
| (3) | Disarmed state B will be switched to if any of the following conditions are met:
|
| (4) | The alarm state will be switched to if any of the following conditions are met:
In addition, at this time, the theft warning ECU assembly sends a starter cut signal to the starter motor.*2 |
| (5) | Disarmed state B will be switched to if any of the following conditions are met:
In addition, at this time, the theft warning ECU assembly stops sending a starter cut signal to the starter motor.*2 |
| (6) | The armed state will be switched to after approximately 27.5 seconds has passed. |
| (7) | When the engine hood is closed, the armed preparation state can be switched. |
| (8) | Disarmed state B will be switched to if any of the following conditions are met:
|
| (9) | When the ignition switch is off and the ignition key is inserted into the ignition key cylinder, disarmed state A is switched to when all of the following conditions are met:
|
Tech Tips
*1: When the shock sensing function is on.
*2: Models without engine immobiliser system