Charge Indicator Operation

The instrument panel cluster (IPC) illuminates the charge indicator in the message center when the one or more of the following occurs:

NOTE: The generator battery control module is not set up to set a DTC if the battery voltage is too high or too low. Check with the powertrain control module (PCM) to see if they set a DTC when the battery voltage is too high or too low.

• 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 there is a system voltage range concern.

  NOTE: Verify with the BCM DRE that this is true.

• 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 generator battery control module determines there is a fault and sends a class 2 message to the IPC to illuminate the charge indicator.