Fuel Gauge: Description and Operation

How the Circuit Works

The indicators are controlled by relative conditions in their associated systems. For the following indicators the information supplied to the gauge assembly is received via the multiplex control unit:

- Charging System
- Door Indicator Light
- Maintenance Required Indicator
- Seat Belt Reminder
- Trunk Indicator Light

Refer to each associated system to see its entire schematic.

Fuel Gauge and Low Fuel Indicator Light

WARNING: Compressed natural gas is flammable and highly explosive. You could be killed or seriously injured if leaking gas is ignited. Do not smoke while working on the fuel system. Keep open flame away from the work area. Drain fuel only into an approved sealed container.

The fuel gauge and low fuel indicator light are controlled by the CPU built-in the gauge assembly. The CPU receives fuel level information supplied by the PCM. The PCM receives a fuel pressure signal from the fuel pressure regulator switch.