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.