Hyundai i-30: Fuel Delivery System / Release residual pressure in fuel line

Hyundai i30 (PD) 2018-2024 Service Manual / Engine Control / Fuel System / Fuel Delivery System / Release residual pressure in fuel line

Release Residual Pressure in Fuel Line
  
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 fuse, a Diagnostic Trouble Code (DTC) may occur. Delete the code with the diagnostic tool after completion of "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 fuse (A).
6.
Connect the battery (-) cable.
7.
Delete the diagnostic trouble code (DTC) related the fuel pump relay with the diagnostic tool.

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    Fuel Pressure Test 1. Release the residual pressure in fuel line. (Refer to Fuel Delivery System - "Release Residual Pressure in Fuel Line")    • When removing the fuel pump relay, the diagnostic trouble code (DTC) will be occurred...

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