Charging System Indicators

The IPC illuminates the charging system indicator 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 sends a class 2 message to the Body Control Module (BCM) indicating that the charging system indicator is illuminated. The BCM sends a class 2 message to the radio in order to activate an audible warning.
^ 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.
^ The ignition is in the accessory position.