Charging System Indicators: Notes

The IPC illuminates the charge indicator when the following occurs:

• The engine control module (ECM ) detects that the generator output is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the ECM requesting illumination of the charge indicator.
• 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 dash integration module (DIM) indicating the system voltage.
• The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.