Fuel Filler Detection Switch: Notes

Special tools and workshop equipment required 

• Multimeter.
• Wiring diagram.

Test requirements 

• The Battery voltage at least 12.5 V.
• All electrical consumers switched off (radiator fan must NOT run during test).
• A/C switched off.
• The fuel tank at least ¹ /₄ filled.
• The ignition switched off.

Test procedure 

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK 

Start diagnosis

Checking voltage 

-- Disconnect the Fuel Filler Cap Detection Switch -F334-.

Switch the ignition ON.

-- Using a multimeter, check the Fuel Filler Cap Detection Switch -F334- electrical connector terminal 3 to Ground for voltage.

Specified value: Battery voltage.

Switch the ignition OFF.

Value	Cause	Test
If the specified value was not obtained:	Open or shorted circuit	Checking wiring
If the specified value was obtained:	Check ground signal circuit	.Checking wiring