Charging Control General

This system lowers the generated voltage when the vehicle is idling or is being driven at a constant speed, and raises the generated voltage when the vehicle is decelerating. This reduces the load on the engine as a result of the electric generation of the generator, thus contributing to the fuel economy of the engine. During acceleration, this system regulates the generated voltage in order to place the amperage estimation value close to the target value.

• This control consists of the ECM, battery current sensor with a built-in battery temperature sensor, generator, and various sensors and switches.

• The ECM detects driving condition based on signals from various sensors and switches, and detects charging condition based on signals from the generator, battery current sensor and battery temperature sensor. Then the ECM outputs signals to the IC regulator to control the genetated voltage of the generator.

The ECM stops the charging control and the generator switches to normal power generation mode under the following conditions:

• Low battery capacity

• Low or high battery temparature

• Wipers operating or blower motor operating with tail lamp relay ON ^ System Diagram ^



Various Electrical Loads

Battery Current Sensor

Battery Temperature Sensor

Battery Voltage


Various Sensors and Switches

• Throttle Position Sensor

• Crankshaft Position Sensor

• Accelerator Pedal Position Sensor


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