Low Fuel

Instrument panel cluster illuminates low fuel indicator when the following occurs:

• Body Control Module (BCM) determines that fuel level is less than a pre-determined value. BCM receives a class 2 message from Powertrain Control Module (PCM) indicating fuel level. BCM sends a message to instrument panel cluster via Serial Peripheral Interface (SPI) requesting illumination. BCM also sends a class 2 message to radio in order to activate an audible warning.
• PCM detects a malfunction in fuel sending unit circuit.
• BCM detects a loss of class 2 communications with PCM.
• IPC detects a loss of SPI communications with BCM.