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| Remove engine cover panel -arrows-. |
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| Clean all connections (with commercial cleaning solution or similar) before removing. |
Note | t
| Make sure all parts are clean; no dirt must be allowed to enter the fuel system. |
| t
| Check all cylinders in turn. |
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| Dry all components after cleaning. |
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| Unscrew the union nut in cylinder 1 on the high-pressure reservoir and also slacken the union nut on the injector a little using the socket attachment -T40055-. Seal off open connection on injector line. |
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| Plug open connection using plug -T40204-. |
| l
| The electrical connector of the relevant injector must remain connected. |
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| Erase all entries in the event memory. |
Note | t
| The entry „positive control deviation“ should no longer be indicated when the defective injector has been located. |
| t
| Other fault messages may possibly be stored in the memory. These result from previous steps and can be disregarded. |
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| After road test read-out the event memory. If an event relating to „positive fuel pressure control“ is still in the event memory, repeat the above steps for all connections of the the high-pressure reservoir until the event entry is no longer indicated after the road-test. |
| Observe all instructions for connecting injector pipes |
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| Lubricate threads of union nuts with fuel. |
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| Tighten union nuts on high-pressure lines hand-tight. Ensure that connections are not under tension. |
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Caution