ST185 fuel level sensor

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ST185 fuel level sensor

Postby EvilStig » Thu Nov 14, 2019 1:24 am

Fuel light doesn't come on anymore, although the gauge seems to work fine. Shop says it's the sensor in the sending unit, which they say has 2 different sensors for the 2 instruments.

Does anyone know what part number this might be and whether it's going to be interchangeable with the one on any other model celicas I might be more likely to find in a scrap yard?
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Re: ST185 fuel level sensor

Postby underscore » Thu Nov 14, 2019 8:12 pm

The only part number I can find is 83320-80141 GAGE ASSY, FUEL SENDER for the whole thing, which only cross references to a USDM ST185. Maybe pull the assembly out of the tank and see what it looks like? I imagine it's just a switch the level float hits on the way down.
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Re: ST185 fuel level sensor

Postby sefiroxx » Thu Nov 14, 2019 8:57 pm

It's, unique to st185.

These are variable resistor with wire harness. When you pull it, you'll see where the float contacts slide against the mounting bracket. Check the contracts are in place, make sure contact plate is clean, meadow resistance via wire harness, move the flat and verify the resistance varies smoothly with no drop off except at bottom.

Also, make sure float is in place.
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Re: ST185 fuel level sensor

Postby 93celicaconv » Sat Nov 16, 2019 2:10 am

This sending unit has 2 independent outputs. One involves a float, which has a variable resistor output, which is going to your fuel gauge. Another is a fixed sensing unit that senses a change as the fuel level gets to and below its sensing element (this goes to your low fuel level warning light). In the situation of the OP, the sensor for the low fuel level sensor has failed. Foe pictures of what the fuel sending unit looks like, see that link below.

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