Charge Indicator

The instrument panel cluster (IPC) illuminates the battery indicator in the message center 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.
• 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 IPC sends a class 2 message to the radio for audible warning when this indicator is on.