Fuel Gauge Problem

[CTScott]

The fuel sender uses a resistive strip for determining the fuel level. The picture below shows one remove from the tank. Contaminants in the fuel can cause the issues you are seeing. Sometimes the issue will fix itself (after 20 or so cycles of the gas tank). You can pull the sender assembly and try cleaning the resistive strip with electronic contact cleaner.

Sender - Gauge.jpg

[shangapol]

Ok, Very good idea but, How I go There??

[CTScott]

Take a look at the "Fuel" section of the repair manual. The access panel for the top of the tank is under the rear seat.

http://www.etimago.com/yaris/repairmanual/

[mazilla]

Originally Posted by CTScott

Take a look at the "Fuel" section of the repair manual. The access panel for the top of the tank is under the rear seat.

http://www.etimago.com/yaris/repairmanual/

Where would one get that tool to remove the retaining ring? I'd like to give this a whirl since my gauge is also malfuntioning. Like most of the others it now shows two bars when it's actually empty...I've gotten pretty close to forgetting to fill up a few times already.

[CTScott]

Originally Posted by mazilla

Where would one get that tool to remove the retaining ring? I'd like to give this a whirl since my gauge is also malfuntioning. Like most of the others it now shows two bars when it's actually empty...I've gotten pretty close to forgetting to fill up a few times already.

The SST is a Toyota tool, so you could probably order it from the dealer for a handful of cash. I used a dead-blow hammer and a piece of oak to spin mine off, when I removed Crashy's.

[wajeehr]

Originally Posted by mazilla

Where would one get that tool to remove the retaining ring? I'd like to give this a whirl since my gauge is also malfuntioning. Like most of the others it now shows two bars when it's actually empty...I've gotten pretty close to forgetting to fill up a few times already.

I am also having exactly a similar problem like yours these days ..
can you tell me how you solved it ?
Thanks

[othater]

Originally Posted by CTScott

The fuel sender uses a resistive strip for determining the fuel level. The picture below shows one remove from the tank. Contaminants in the fuel can cause the issues you are seeing. Sometimes the issue will fix itself (after 20 or so cycles of the gas tank). You can pull the sender assembly and try cleaning the resistive strip with electronic contact cleaner.

Attachment 42518

CTScott,

1) On cleaning the resistive strip.
Whats you opinion on using fuel cleaner, Redline in the gas tank to possibly clean the strip.
2) I replied to another thread where the person reset the ECU. Would that re-learn the gas sender to gas bars?

Thank you for your knowledge.

[CTScott]

Originally Posted by othater

CTScott,

1) On cleaning the resistive strip.
Whats you opinion on using fuel cleaner, Redline in the gas tank to possibly clean the strip.
2) I replied to another thread where the person reset the ECU. Would that re-learn the gas sender to gas bars?

Thank you for your knowledge.

I am not sure about if fuel system cleaner will help or not. I have a gut feeling that it will considering that I had a Subaru that had a fuel gauge issue, which eventually healed itself.

Resetting the ECM will not help, since the ECM doesn't see the fuel sender, just the cluster ECU does. You can try disconnecting the battery to reset it, but it actually reinitializes the fuel level every time you shut the car off.