13 31 025 Check the fuel return pressure (N47 D16 20 K/U/O/T 1)

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Special tools required:

Necessary preliminary tasks:

Remove REAR UNDERBODY PROTECTION .
Connect BMW diagnosis system.

Recycling:

Catch and dispose of escaping fuel with auxiliary materials.

Observe country-specific waste disposal regulations.

Unscrew nuts (1).

Remove guard plate (2).

Release fuel lines from protective plate.

Fig 1: Identifying Guard Plate Nuts

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Unlock and disconnect fuel return line (1).

Fig 2: Identifying Fuel Return Line

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Insert special tool 13 6 030 into the disconnected return line.

Screw onto special tool 13 6 030 , special tool 11 4 310 .

Screw IMIB 100 bar pressure sensor (1) on the special tool 11 4 310 .

Fig 3: Screwing IMIB 100 Bar Pressure Sensor On Special Tool (11 4 310)

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NOTE: As an alternative to the 100 bar IMIB pressure sensor (1), the 25 bar pressure sensor can also be used. For this, screw on special tool 11 5 364 instead of special tool 11 4 310 onto special tool 13 6 030 . Or directly screw the pressure manometer from the set of special tools 13 3 060 onto the special tool 13 6 030 .

Build up fuel return pressure. Read off fuel return pressure on IMIB and compare with values in diagnosis system.