| Exhaust gas recirculation system |
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| The exhaust gas recirculation system is actuated by the engine control unit -J248- via the exhaust gas recirculation valve -N18- and the mechanical exhaust gas recirculation valve. |
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| The tapered plunger in the mechanical exhaust gas recirculation valve varies the opening cross section according to valve travel. |
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| Pulsed actuation makes it possible to obtain any required valve position. |
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| The exhaust gas recirculation is switched off after approx. 2 minutes at idling speed. |
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| Restart engine or briefly increase engine speed above 1500 rpm when longer checks are necessary. Then repeat measurement. |
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| Secure all hose connections with the correct type of hose clips (same as original equipment) → Parts catalogue. |
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