Fuel Gauge: Operation
The low fuel warning light operates as follows:
The signal from the fuel level sensor is converted into a digital signal at the body integrated unit, and then sent to the combination meter. The combination meter microprocessor continually monitors this signal. It turns on the low fuel warning light in the combination meter if a resistance value corresponding to the critical fuel level is detected for a certain time while driving.
This monitoring time has been decided to avoid false operation of the warning light, which may happen when a large part of remaining fuel is collected temporarily in the sub tank compartment.