Special tools, testers and auxiliary items required
- Hand held remote control (jumper).
- Multimeter.
- Electrical connector test lead set.
- Measuring container, fuel-resistant.
Test conditions
- Battery voltage 12.5 V
- Fuel filter OK
- Fuel tank at least 1 / 4 filled.
- Fuel pressure regulator OK.
- Ignition switched off.
Test procedure
- Perform a preliminary check to verify the customers complaint. Refer to --> «General Diagnosis»(ref-276276-S40851803372008010300000)
Start diagnosis
- Open cover from fuse box at left side of instrument cluster.
- Remove fuse 28 at fuse holder.
- Connect remote control connection at right terminal of socket of fuse S28.
- Connect alligator clip to vehicle battery B+.
- Remove the fuel filler cap from fuel filler.
| CAUTION | Fuel system is under pressure! Before opening the system, place rags around the connection area. Then release the pressure by carefully loosening the connection. |
Scheme 6
- Remove the bolt - 1 - and the cover above reservoir - arrow -.
Scheme 7
- Disconnect the fuel return line - 1 - from the line connection - 2 - by pressing the release button.
- Connect the Fuel pressure test set (high pressure) onto the disconnected fuel return line.
- Press switch on remote control for 15 seconds.
Scheme 8
- Compare quantity of fuel delivered with minimum delivery rate in the diagram (cm 3 /15s).
Note. Voltage at the fuel pump with engine stopped and fuel pump running is approx. 2 volts less than battery voltage.
If minimum delivery quantity is not obtained, the following malfunctions may be present
- Fuel lines pinched.
- Fuel filter clogged.
- Fuel pump faulty.
Assembly is performed in reverse order of removal.
End of procedure