13 31 029 Checking fuel pump delivery pressure (S62)
Special tools required:
- 13 5 220
- 13 5 221
- 13 5 222
- 61 3 050
Switch off ignition.
Remove rear underbody protection from assemblies.
Remove cover (1).
Remove dust cap (1).
Connect special tool kit 13 5 220 (comprising 13 5 221 and 13 5 222) to pressure sensor of DIS Tester.
Connect pressure sensor to DIS Tester.
This could damage the valve in the pressure regulator housing.
Attach special tool kit 13 5 220 to housing of pressure regulator and tighten knurled nut until hand-tight.
Screw out check valve (1) so that valve in pressure regulator housing is closed.
Start engine.
Screw in check valve (1) until a pressure reading is indicated on DIS Tester.
Measuring fuel pressure.
- Select Measurement.
- Multimeter function appears
- Select Pressure test
- Read off pressure.
Compare with test pressure. Refer to 13 53 INJECTORS AND LINES, FUEL PRESSURE REGULATOR (S62 B50) .
Switch off engine.
Checking fuel pump:
Remove fuel pump relay. Refer to 13 63 590 Replacing fuel pump relay .
Connect special tool 61 3 050 to terminals 87 and 30. Press button and read off fuel pump delivery pressure on DIS Tester.
Fuel pump delivery pressure, refer to 16 14 FUEL PUMP E52 .
- Switch off engine
- Screw out check valve fully again.
- Remove special tool kit 13 5 220 from pressure regulator housing.
- Catch and dispose of escaping fuel.