13 31 029 Checking fuel pump delivery pressure (M54)

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2006 BMW 325Ci, 2005 BMW 325xi, 2005 BMW 325i, 2005 BMW 325Ci, and 2004 BMW 325xi. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools Required:

13 3 010
13 5 220
61 3 050
Switch off ignition.

CAUTION: The fuel in the fuel lines is under pressure (approx. 3 bar)! Catch and dispose of escaping fuel.

Remove cover from fuel injectors. See 13 53 240 REPLACING COMPLETE INJECTION PIPE (M56)

Remove dust cap (1) from measuring valve on fuel rail.

Fig 1: Removing Dust Cap

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Prepare special took kit 13 5 220 (consisting of 13 5 221 and 13 5 222).

Fig 2: Identifying Special Took Kit 13 5 220

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Unscrew check valve (1) on special tool kit 13 5 220.

Fit special tool kit 13 5 220 on measuring valve and tighten knurled nut until hand-tight.

Fig 3: Fitting Special Tool Kit 13 5 220

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Start engine.

Screw in check valve (1) until a pressure reading is indicated on DIS Tester.

CAUTION: Do not under any circumstances screw in the check valve up to the mechanical stop. This could damage the valve in the pressure regulator housing.

Measuring Fuel Pressure:

Connect pressure sensor to DIS Tester.
Start engine.
Select Measurement.
Multimeter function appears.
Select Pressure test.
Read off fuel pressure.

Compare actual value of test pressure with specified value.

Test pressure/nominal value: 3.5 bar +/- 0.2

Switch off engine.

Checking Fuel Pump:

Detach fuel pump relay.

NOTE: Check whether fuel pump no longer starts up during engine starting procedure (engine fails to start).

Connect special tool 61 3 050 to terminal (87) and terminal (30).

Fig 4: Connecting Special Tool To Terminals

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Press button and read off fuel pump delivery pressure on DIS Tester.

Compare actual value with specified value of delivery pressure.

Fuel delivery pump operating pressure: 3.5 bar.

Typical current consumption: Equal to or less than 9 A.

Keep special tool 13 3 010 ready for further tests.

Fig 5: Identifying special tool 13 3 010

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Further tests are described in Fuel pressure check, refer to 13 31...NOTES ON FUEL PRESSURE CHECK (REFERENCE PRESSURE: ENVIRONMENT) .

NOTE: Interrogate fault memory of DME control unit.

Check stored fault messages.

Rectify faults.

Then clear fault memory.