Fuel Filler Cap: Description and Operation
Fuel Filler CapFuel Filler Cap:
The fuel filler cap (Figure 100) is used to prevent fuel spill and close the evaporative emission/fuel system to atmosphere. Some vehicles may have a Fuel Cap Off Indicator Lamp (FCIL) in the instrument cluster which will illuminate when there is a failure in the vapor management system that may be due to the fuel filler cap not being sealed.
Refer to the individual component for information on the following Evaporative Emission System components: fuel vapor control valve, fuel vapor vent valve assembly and fuel vapor separator assembly.