Operation CHARM: Car repair manuals for everyone.

Charging System: Description and Operation

When engine is stopped
When the ignition switch is switched to the "ON" position, electricity flows from the "L" terminal of the generator to the field coil, and at the same time the charging warning light illuminates.

When engine is being started/has started
When the engine is started, charging voltage is applied to the "L" terminal of the generator, with the result that the charging warning light is extinguished. In addition, because battery voltage is applied to the "S" terminal of the generator, this battery voltage is monitored at the IC voltage regulator, thus switching ON and OFF the current to the field coil and thereby controlling the output voltage of the generator.
Power is supplied to each load from the "B" terminal of the generator.

NOTE: The generator relay functions as a back-up for the flow of electricity to the field coil if there is a disconnection or damaged wiring of the charging warning light.