A8L V8-4.2L (BFM) (2004)
Fuel Filler Cap Warning Indicator: Service and Repair
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.
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Check the following items in order with a lighted display:
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Proper connector flange cap (recognized by:) with magnet (arrow)
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Connector flange cap is fully screwed on
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Switch -1- is fully inserted at fuel filler tube
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Check electrical fault in switch. See Electrical test for Fuel Tank Lock Switch -F314-
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Faulty wiring connection to instrument cluster (check according to wiring diagram)
Electrical test for Fuel Tank Lock Switch -F314-
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Rear right wheelhousing liner, removing
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Disconnect electrical harness connector -2-.