• There may be some residual pressure even after "Release Residual Pressure in Fuel Line" work, so cover the hose connection with a shop towel to prevent residual fuel from spilling out before disconnecting any fuel connection.
1.Turn the ignition switch OFF and disconnect the battery (-) cable.
2.Remove the fuel pump fuse (A).

• When removing the fuel pump relay, the Diagnostic Trouble Code (DTC) will be occurred. Therefore delete the code with the diagnostic tool after "Release Residual Pressure in Fuel Line" work.
3.Connect the battery (-) cable.
4.Start the engine and let idle, and then turn the ignition switch OFF after the engine has stopped on its own.
5.Disconnect the battery (-) cable, and then install the fuel pump relay (A).
6.Connect the battery (-) cable.
7.Delete the Diagnostic Trouble Code (DTC) related the fuel pump relay with the diagnostic tool.
Fuel Pressure Test
Fuel TankHyundai Tucson (NX4) 2022-2026 Service Manual: SBW Control Unit(SCU)
- Component Location
1. Shift by wire Control Unit (SCU)
- Schematic Diagrams
PinFunctionPinFunction
1Power21-
2Ground22-
3H-CAN High23-
4H-CAN Low24-
5P-CAN High25-
6P-CAN Low26-
7Position sensor ground27Position sensor signal 1
8-28Position sensor signal 2
9-29P position o ...
Hyundai Tucson (NX4) 2022-2026 Owner's Manual: Fuel gauge
This gauge indicates the approximate
amount of fuel remaining in the fuel tank.
Information
The fuel tank capacity is given in
Chapter 10.
The fuel gauge is supplemented by a
low fuel warning light, that illuminates
when the fuel tank is nearly empty.
On inclines or curves, the ...