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Fuel Fill Door Description and Operation

The refuelling system consists of the following components:

To effectively manage evaporative fuel emissions, hybrid vehicles with extended electrical range capability must be equipped with a "pressurised" fuel system that can be sealed from atmosphere when the internal combustion engine is not operating.

When the fuel system is sealed, the internal pressure will vary with changes in temperature, such as the natural variation in ambient temperature that occurs throughout the day. To maintain evaporative emissions compliance, vehicle refuelling can only be permitted once the fuel system has been adequately vented to atmosphere through the carbon canister. The Refuelling Management feature described in this document provides the necessary means to regulate customer access to the fuel cap and manage venting of the fuel system in order to facilitate vehicle refuelling without compromising evaporative emissions compliance.

When the refuel request switch is pressed, a 5 V signal is sent to the hybrid powertrain control module 2 which will then command the fuel system to vent and will send a serial data message to the driver information centre to display the Wait To Refuel message.

After the system has been vented, the hybrid powertrain control module 2 will send a command to unlock the fuel filler door and will send a serial data message to the driver information centre to display the Ready To Refuel message. After the vehicle has been refueled, the hybrid powertrain control module 2 will send a serial data message to the driver information centre to display the Close Fuel Door message until the fuel filler door is closed. The hybrid powertrain control module 2 will then command the fuel filler door to lock 5 seconds after the fuel filler door is closed or the vehicle speed exceeds 40 km/h (25 mph).