| Repairing diesel direct injection system |
| The diesel direct injection system control unit -J248- is equipped with a fault memory. Before starting repairs, adjustments and fault finding, the fault memory must be interrogated → Chapter and final control diagnosis carried out → Chapter. |
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| Certain tests may lead to a fault being detected by the control unit and stored. Therefore, after completing all checks and repairs, interrogate the fault memory and erase if necessary → Chapter, Interrogating fault memory. |
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| Components marked with * are checked via self-diagnosis → Chapter, Reading and clearing fault memory. |
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| Components marked with * can be checked using final control diagnosis → Chapter. |
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| For trouble-free operation of electrical components, a voltage of at least 11.5 V is necessary. |
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