Generator
The AD-244 generator is non-repairable. They are electrically similar
to earlier models. The generators feature the following major components:
| • | The rotor with slip rings and brushes |
The pulley and the fan cool the slip ring and the frame.
The AD stands for Air-cooled Dual internal fan; the 2 is an electrical
design designator; the 30/44 denotes the outside diameter of the stator laminations
in millimeters, over 100 millimeters. The generators is rated at 145
amperes.
The generator features permanently lubricated bearings. Service should
only include the tightening of mounting components. Otherwise, the generator
is replaced as a complete unit.
Regulator
The voltage regulator controls the field current of the rotor in order
to limit system voltage. The regulator switches the current on and off at
a rate of 400 cycles per second in order to perform the following functions:
| • | Obtain the correct average current needed for proper system voltage
control |
At high speeds, the on-time may be 10 percent with the off-time
at 90 percent. At low speeds, the on-time may be 90 percent
and the off-time 10 percent.
Charging System Indicator
The IPC illuminates the charge indicator in the message center when
the following occurs:
| • | The PCM detects that the generator output is less than 11 volts
or greater than 16 volts. The IPC receives a class 2 message
from the PCM requesting illumination. |
| • | The IPC determines that the system voltage is less than 11 volts
or greater than 16 volts. The IPC receives a class 2 message
from the body control module (BCM) indicating the system voltage. |
| • | The IPC performs the displays test at the start of each ignition
cycle. The indicator illuminates for approximately 3 seconds. |
| • | The ignition is on, with the engine off. |
