13 31 029 Checking delivery pressure of fuel pump (M62)

Switch off ignition.

Turn fasteners on acoustic cover 90° counterclockwise.

Remove acoustic cover.

Fig 1: Removing Acoustic Cover

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

Fig 2: Removing Dust Cap From Measuring Valve On Fuel Rail

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

Mount special tool kit 13 5 220 on fuel rail and tighten knurled nut until hand-tight.

Fig 3: Connecting Fuel Pressure Tester (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.

Measuring fuel pressure: 

• Connect pressure sensor to DIS Tester
• Start engine.
• Select MEASUREMENT
• Multimeter function appears
• Select PRESSURE TEST
• Read off fuel pressure

Test pressure,

refer to FUEL SYSTEM - TECHNICAL DATA - X5 (4.6L) .

Switch off engine.

Checking fuel pump: 

Detach fuel pump relay,

refer to 13 63 590 REPLACING FUEL PUMP RELAY  .

Connect special tool 61 3 050 to terminal (87) and terminal (30) of fuel pump relay connector.

Fig 4: Connecting Special Tool 61 3 050 To Fuel Pump Relay

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

Delivery pressure,

refer to 16 14 in FUEL SYSTEM - TECHNICAL DATA - X5 (4.6L) .

Fig 5: Clamping Fuel Feed Line With Special Tool

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Keep special tool 13 3 010 available for further tests.

Further procedure for checks,

refer to 13 31 ... NOTES ON FUEL PRESSURE CHECK (REFERENCE PRESSURE: ENVIRONMENT)  .

Installation: 

Interrogate fault memory of DME control unit. Check stored fault messages. Rectify faults. Now clear the fault memory.