Passive Misfueling Protection Device System
| ITEM | DESCRIPTION |
|---|---|
| 1 | Filler neck |
| 2 | Flap |
| 3 | Reset slots |
| 4 | Spigots |
| 5 | Reset tool |
| 6 | Spring |
The passive misfueling protection device system comprises a mechanically operated flap which is triggered when the smaller diameter filler nozzle tube, used on petrol pumps, is inserted in the filler neck. The shut off flap is actuated and blocks the sensor port on the fuel pump nozzle, causing it to automatically switch off. The shut off flap is locked in this position by a latch mechanism, once it has been activated.
A reset tool is provided and stored in the spare wheel well. The tool is used to reset the misfueling protection device if triggered. The tool is inserted into the filler opening as far as possible with the spigots pointing upper most. Once the two spigots on the tool are located in the slots it can be pulled outwards, releasing a latch and allowing the shut off flap to be opened by its own spring pressure.
The shut off flap is colored yellow so that it is clearly visible within the entrance of the fuel filler pipe when activated, the shut off flap has a 'Handbook' symbol on it.
A 25mm diameter diesel fuel pump nozzle will not activate the misfueling protection device because the nozzle stops against two molded lugs. However, if a 21mm diameter unleaded petrol pump nozzle is inserted into the housing, its smaller diameter allows it to pass the two molded lugs. The nozzle strikes two pins on the inside of the filler housing which move forward. This movement rotates the shut-off flap which is then held in place when the nozzle is removed by the latch mechanism.