1. IBS overview
The IBS is a system that effectively adjusts power generation levels based on vehicle operation conditions and battery status.
When engine load is high, it decreases fuel consumption by suppressing load increases caused by power generation.
1. Generation control
Use the charged battery power to restrict power generation by the generator during start-up or accelerating the vehicle.
Increase the amount of power generated by the generator to charge the battery during deceleration.
For the following condition, the generation control by IBS is stopped and switched to the normal charge by the regulator control built into the generator.
- If battery protection is needed, such as at high or low battery temperature and insufficient battery capacity
- When the headlight illuminates or when the wipers operate
- If there is a malfunction in the charge control system
- If periodical charge* is performed
Note
- *: The battery sensor accumulates generation control time by the IBS, and performs periodical charge when 20 hours have passed. If the power supply to the battery sensor is cut off, the accumulated time will be reset.
System schematic (Models with BCM)
System schematic (Models without BCM)
2. IBS controls components
1. Battery sensor
The battery sensor is installed to the battery negative terminal and calculates the amount of power generated according to the driving conditions from the following information and controls the adjustment voltage of the generator via LIN communication.
- Battery temperature, voltage and current
- Information, such as vehicle speed and accelerator opening position, obtained from the ECM via CAN communication
- Headlight switch and wiper switch information from the BCM via CAN communication (Models with BCM)
- Electrical load information by way of switch signals such as from the headlights and wipers (Models without BCM)
Caution
- If the ground of electronic components, etc., is directly connected to the battery sensor, the difference between the amperage measured by the battery sensor and the actual battery amperage may run down the battery due to control malfunction.
2. Generator warning light
The generator warning light is located in the instrument panel cluster. The generator warning light illuminates when the ignition switch is turned ON for a light check, and turns OFF after the engine is started.
The generator warning light indicates that a malfunction has occurred in the charge control system and that vehicle service is required.
3. IBS controls component views
1. IBS control component layout
Legend
- Battery sensor
4. General circuit diagram
General circuit diagram
IBS outline view
| 1 |
Ignition switch |
| 2 |
CAN low signal |
| 3 |
CAN high signal |
| 4 |
Headlight switch (Only models without BCM) |
| 5 |
Battery voltage |
| 6 |
Generator |
| 7 |
- |
| 8 |
- |
| 9 |
Wiper switch (Only models without BCM) |
| 10 |
- |