Checking Fuel Pump Delivery Pressure

13 31 029 - Checking fuel pump delivery pressure (N62TU2)





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.

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, refer to Technical Data Technical Data.
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.
Delivery pressure, refer to Technical Data.





Notes on fuel pressure check Notes on Fuel Pressure Check (Reference Pressure - Environment).

Installation Note:
Now clear the fault memory.