Indicators, Instrument Cluster: Operation: Indicators: Notes

Indicators are located in various positions within the Instrument Panel Cluster (IPC), and are all connected to the electronic circuit board, and are completely controlled by the IPC microcontroller. The various indicators are controlled by different strategies; some receive fused ignition switch output from the IPC circuitry and have a switched ground, while others are grounded through the circuitry and have a switched battery feed. However, most are controlled by Controller Area Network (CAN) data bus messages from other electronic modules in the vehicle, but some are controlled by a combination of hard-wired inputs, electronic messaging, and IPC programming. If the IPC loses CAN data bus communication, the internal circuitry of the IPC will automatically turn ON the Malfunction Indicator Lamp (MIL) until CAN data bus communication is restored.

Certain indicators in the IPC are automatically or self-configured. This feature allows the configurable indicators to be enabled by the IPC circuitry for compatibility with certain optional equipment. These indicators are enabled or disabled by an electronic configuration  message sent to the IPC by the Body Control Module (BCM). The automatically or self-configured indicators remain latent in each BCM at all times and will be active only when the IPC receives the appropriate CAN bus message inputs for that optional system or equipment.

Below are brief explanations of the indicators available on this vehicle. More detailed information may be available elsewhere in this service information under the module or system sections that control or influence the illumination of an indicator located within the instrument cluster or the Vacuum Florescent Display (VFD). The indicators, the VFD display as well as the gauges are only serviceable with the instrument cluster as an assembly. The cluster lens and hood assembly are the only components serviceable separate of the instrument cluster.