| Fitting location of automatic glow period control unit -J179- |
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| The glow plug system is activated via the automatic glow period control unit -J179-. The automatic glow period control unit -J179- is capable of self-diagnosis. |
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| A fault is stored in the event memory of the engine control unit -J623- if a fault occurs in the glow plug system. |
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| The procedure for checking the glow plug system is described in the „Guided Fault Finding“. |
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| For faster starting, the vehicle is equipped with electronically controlled glow plugs and a separate glow period control unit. |
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| Each glow plug is activated and diagnosed separately. |
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