Remove
Important. For the entire operation, it is essential to work in a clean environment. Dirt in the area of the metering unit must be avoided. Even minute dirt particles invisible to the naked eye can cause major problems with engine performance. Particles as small as 0.3 mm can be critical! Do not wear gloves. Do not fit any metering unit that has been dropped. Disconnect battery after fault tracing. Before using the metering unit, wait a few minutes to avoid the system working autonomously.
- 1. Open bonnet
- 2. Disconnect battery • Detach ground cable – Undo nut
- 3. Raise vehicle by its full height
- 4. Unclip wiring harness (3) from bracket
- 5. Separate wiring harness plug for metering unit • Unclip wiring harness plug (4)
- 6. Remove metering unit (2) • Unscrew 2x bolts (1)
- 7. Remove metering unit
- 8. Take out seal ring • Remove seal ring (1) from high pressure pump
- 9. Clean sealing surface
- 10. Check 2x fuel supply bore (arrow) for dirt
Install
- 11. Insert new seal ring • Coat new seal ring (1) with engine oil and insert in high pressure pump – Ensure correct seating
- 12. Metering Unit, insert • Apply clean engine oil to the O-ring (1) of the metering unit
- 13. Fit metering unit • Ensure the metering unit is seated correctly • Tighten 2x bolt 10 Nm
- 14. Connect wiring harness plug for metering unit
- 15. Clip wiring harness into bracket
- 16. Lower vehicle by its full height
- 17. Connect battery • Attach earth clamp to earth terminal – Tighten nut
- 18. Program volatile memories
- 19. Reset learned values of high pressure pump with Tech 2 • Programming • Confirm "Replace pump" with "Yes"
- 20. Carry out seal test on metering unit • Actuator test • Carry out fuel leak test
- 21. Visual inspection • Check metering unit for fuel leak
- 22. Close bonnet