| They are connected together in parallel and go directly to the fuel gauge in the gauge cluster. They do not go to the ECU and the ECU doesn't have anything to do with them. Although the sending units commonly go bad in Nissan cars made during the years our Zs were made, you may have a bad fuel gauge. If the gauge doesn't seem to move at all it may be a bad gauge. It's easy to check if the gauge is sticking. Disconnect the connector to the sending unit by disconnecting everything to the fuel pump on the driver side of the car. Then turn the key to the ON position but don't attempt to start the car. Watch the fuel gauge. It should move all the way down past the empty line. When you see it go past the line turn off the car and reconnect the connectors at the fuel pump. Start the car and observe the fuel gauge. It should rise slowly to the point of how much fuel you have in the tank. I would suggest filling the fuel tank before you do the test. If the gauge level rises but doesn't go all the way to full then you probably have a bad sending unit. Disconnecting the passenger side unit may help in determining which one is bad by what you observe the fuel gauge doing when you disconnect it. If it drops all the way below empty then the driver side unit is bad. If it stays basically where it's at then the passenger side is most likely bad.
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18:39:20 03/03/14
