Both sensors have the same potentiometers, the test of both sensors is the same. Fuel pump (in the right fuel gauge) can only be checked at a service station when removed. Check the performance of the pump in the installed position according to the above procedure.
Examination
Remove the fuel gauge.
Connect an ohmmeter to the fuel reserve sensor connector terminals, see the figures in the subsection "Removal and installation of the gauge of a stock of fuel".
Keep the fuel gauge in the working position, the float is down, and in this position the indicator on the dashboard would show "reserve". Set value: 10 + 2 ohms.
Turn the fuel gauge 180°, the float is on top, and in this position, the indicator on the dashboard would show "full". Set value: 250 + 5 ohms.
Replace a defective fuel gauge assembly as a set.
Attention: The fuel sensors are only supplied as a complete set, individual parts cannot be replaced.