13 31 029 Checking Fuel Pump Delivery Pressure (N62TU2)

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2010 BMW 650i, 2009 BMW 650i, 2008 BMW 750i, 2008 BMW 750Li, and 2008 BMW 650i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

13 5 220
61 3 050

Necessary preliminary tasks:

Read out fault memory of DME control unit
Switch off ignition
Remove ACOUSTIC COVER and air filter housing on right
Remove right ignition coil cover

IMPORTANT:

Fuel in fuel lines is under pressure (approx. 3-5 bar)!

Catch and dispose of escaping fuel.

Remove dust cap on measuring valve of fuel rail.

Unscrew non-return 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.

Start engine.

Screw in non-return valve (1) until a pressure reading is indicated on the DIS Tester.

Fig 1: Identifying Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

Do not under any circumstances screw in the check valve up to the mechanical stop. This could damage the valve in the fuel rail.

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:
13 53 INJECTORS AND LINES, FUEL PRESSURE REGULATOR N62 / N45 / N46

Test pressure / nominal value bar ± 0.2 3.5

Switch off engine.

Checking fuel pump:

Remove fuel pump relay.

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

Operate button and read off fuel pump delivery pressure at DIS Tester.

Fig 2: Identifying Special Tool And Terminals

Courtesy of BMW OF NORTH AMERICA, INC.

Notes on FUEL PRESSURE CHECK .

Installation:

Now clear the fault memory.