The charging system provides voltage to the battery and to the vehicle electrical systems. The generator's voltage regulator controls the rotor's field current to meet these needs.

Current flows (1) through the slip rings (8) to the rotor winding (2) in order to create a magnetic field (3). The engine-driven rotor (4) is rotated by the engine within the stator (5). This rotation creates an alternating current (AC) voltage in the stator windings (6) The AC voltage goes to the rectifier bridge (7). The rectifier bridge converts this AC voltage to direct current (DC) voltage. The DC voltage is delivered from the generator's output terminal to the battery and the electrical systems through a fusible link. The regulator grounds circuit 225 when the charging system voltage is abnormal. This information causes the PCM to ground circuit 25, which turns on the charge indicator lamp.

The voltage regulator limits system voltage by controlling the rotor field current. When the field current is on, the regulator switches the rotor field on and off at a fixed rate of about 400 cycles per second. By varying the overall on/off time, correct average field current for proper system voltage control is maintained. At high speeds, the on time may be 10 percent and the off time may be 90 percent. At low speeds, with high electrical loads, the on/off time may be 90 percent and 10 percent respectively.

The voltage reads battery voltage when the engine is not running and reads charging system voltage when the engine is running. The normal indication when the engine is running. The normal indication is between 11 and 16 volts.

The generator uses only two connections - battery positive and the L terminal, in addition to the ground path through the generator bracket. Use of P, I, and S terminals is optional. The P terminal is connected to the stator and may be connected externally to a tachometer or other devise. The I terminal can be connected directly to battery voltage to power the generator instead of, or in addition to, the L terminal which must be stepped down. This S terminal may be connected to an external voltage source, such as voltage near the battery, for voltage control. If the S terminal in not used, internal generator voltage is used for control.

The CS-130D generator must be replaced, DO NOT disassemble the CS-130D generator.