Fuel Filler Cap Sensor / Switch: Testing and Inspection

Fuel Tank Lock Switch -F314-

Fuel Tank Lock Switch -F314- consists of a reed contact on fuel filler tube and a connector flange cap with an embedded magnet. With a connector flange cap that is not fully screwed on, the reed contact switches and triggers an indication on the display in instrument cluster.
- Check the following items in order with a lighted display:







- Proper connector flange cap (recognized by: with magnet (arrow)
- Connector flange cap is fully screwed on







- Switch -1- is fully inserted at fuel filler tube
- Electrical fault in switch. Checking.
- Faulty wiring connection to instrument cluster (check according to wiring diagram)

Electrical test for Fuel Tank Lock Switch -F314-
- Rear right wheelhousing liner, removing:







- Disconnect electrical harness connector -2-.







- Connect multimeter between terminal 1 and 2 for resistance measurement.


Connector flange cap Specified value
Screwed on tightly 8.5 to 11.5 ohms
Not or incorrectly screwed on infinity ohms

If specified values are not obtained:







- Replace Fuel Tank Lock Switch -F314-. To do so, disconnect electrical harness connector -2- and unclip/clip switch with connection from bracket.