| Releasing pressure in high-pressure area |
WARNING | The injection system is sub-divided into a high pressure system (max. approx. 120 bar) and a low pressure system (approx. 6 bar). |
| Prior to opening the high-pressure area, e.g. when removing the high-pressure pump, fuel rail, injectors, a fuel line, or the fuel pressure sender -G247-, the fuel pressure in the high-pressure area must be reduced to a residual pressure of approx. 6 bar. The appropriate procedure is described as follows. |
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WARNING | The fuel lines are pressurized! Wear eye protection and protective clothing to avoid eye injuries and skin contact. Before opening the high-pressure section, wrap a cloth around the connection. |
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| Place a clean cloth around the connection, and open it carefully to eliminate the residual pressure of approx. 6 bar overpressure. Catch the escaping fuel. |
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| After completing work, read fault memory of engine control unit, erase all fault entries that have been created by pulling off connector. |
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