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Metering Unit, Replace
 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.
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| 1. |
Open bonnet
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| 3. |
Raise vehicle by its full height
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| 4. |
Separate wiring harness plug (1) for metering unit
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| 5. |
Remove metering unit (2)
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| 7. |
Take out seal ring
| • |
Remove seal ring (2) from high pressure pump
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| 8. |
Clean sealing surface (1)
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| 9. |
Check 2x fuel supply bore (arrow) for dirt
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Install
| 10. |
Insert new seal ring
| • |
Coat new seal ring (2) with engine oil and insert in high
pressure pump (1)
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| 11. |
Metering Unit, insert
| • |
Apply clean engine oil to the O-ring (1) of the metering
unit
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| 12. |
Fit metering unit
| • |
Ensure the metering unit is seated correctly
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| 13. |
Connect wiring harness plug for metering unit
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| 14. |
Lower vehicle by its full height
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| 15. |
Connect battery
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Attach earth clamp to earth terminal
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| 16. |
Program volatile memories
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| 17. |
Reset learned values of high pressure pump with Tech 2
| • |
Confirm "Replace pump" with "Yes"
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| 18. |
Carry out seal test on metering unit
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Carry out fuel leak test
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| 19. |
Visual inspection
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Check metering unit for fuel leak
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