Dashboard gauge Because if my caravan will bend on the left side the fuel gauge will go to  half tank, if the caravan will bend to right side the fuel gauge will go to empty. but the tank have 15 liters of gasoline. Please help me. Thanks

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The fuel gauge sender in the tank is failing.

https://www.google.com/search?q=2002+toyota+camry+fuel+gauge+sender+unit

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if you read the owners manual it will tell you that the unit will not reset properly with only fuel added
that means to get it to read right again you have to fill the tank completely

Depending on your system, either the float is stuck or the sending unit is bad in the tank, or your gauge is bad. Rarely is it the wiring in-between, but that is also a possibility.

the fuel level sender is inside the fuel tank, part of the fuel pump assembly. did you or was the tank replaced before??they may have bent the float arm on reassembly . you can buy the sender from your parts supply store .you will have to drop the tank to do this it clips onto the side of the pump assembly. run it almost dry first as the tank is big n very heavy even 1/4 full. you can try to bend the old arm

but its very hard on the "sender" as for level indicator full to empty, think of the shape of the tank narrow at top to widest point in the middle (full to half) wide middle to narrow bottom( half to empty)

its just an overall volume thing

My friend on your attempt to renew the fuel pump which actually is connected with the fuel gauge you either damage the leveling gauge either by bending it or scratched it to a place where the gauge shows half tank. It is better to remove again and very slowly and carefully check for any slight faults.
Good Luck.

Its very simple. If the gauge is showing half full then fill the tank and see how much fuel it takes. If the amount you add is approximately 50 percent of the fuel tank capacity then you know the fuel gauge is accurate . In that case the computer is giving an inaccurate reading and should be ignored. All you need is an accurate fuel gauge - it does not matter a row of beans what the computer says if the fuel gauge is reading correctly.

Probably not. Sounds like a bad ground. The ground connecting point for the door is behind the drivers side kick panel, lower left. And the ground for the fuel sending unit is on the drivers side fender well. First I would unplug the connection at the tank (you can usually access this plug without drooping the tank) and check for corrosion. Clean it if any and take a paper clip and bend the tabs a little in the plug to make a better connection.

sounds like you have a bad fuel gauge sensor thats mounted in the fuel tank!

you will need to check the fuel float for a leak or its got a bad connection on the sending unit for the gauge

you will need new sending unit you have 2 left and right you will need a scan tool and one is not working right most the time is left side sending unit bad not working it can be replaced from inside