13 31 029 Checking fuel pump delivery pressure (M54)

WARNING: This page is about a different car, the 2003 BMW X5, 2002 BMW X5, and 2001 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

For Special Tool identification, see SPECIAL TOOLS - X5 (3.0i) .

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.

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

Fig 1: Removing Dust Cap From Measuring Valve

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

Fig 2: Identifying Special Tool Kit 13 5 220 Components

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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.

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.

Fig 3: Installing Adaptor

Courtesy of BMW OF NORTH AMERICA, INC.

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 . Refer to FUEL SYSTEM - TECHNICAL DATA .

Switch off engine.

Checking Fuel Pump:

Detach fuel pump relay . Refer to 13 63 590 REPLACING 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).

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

Compare actual value with specified value of delivery pressure . Refer to FUEL SYSTEM - TECHNICAL DATA .

Fig 4: Connecting Bypass Switch To Terminals

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Keep special tool 13 3 010 ready for further tests.

Further tests are described in the article FUEL PRESSURE CHECK. Refer to 13 31 ... NOTES ON FUEL PRESSURE CHECK (REFERENCE PRESSURE: ENVIRONMENT) .

Fig 5: Identifying Hose Clip

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NOTE: Interrogate fault memory of DME control unit. Check stored fault messages. Rectify faults. Then clear fault memory.