Checking Delivery Pressure of Fuel Pump (M62)

Checking Delivery Pressure Of Fuel Pump (M62)

Switch off ignition.


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







Turn fasteners on acoustic cover 90° counterclockwise.
Remove acoustic cover.







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







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.
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

Test pressure.
Switch off engine.



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.











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