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Exhaust gas recirculation system
Exhaust gas recirculation system
Notes:
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◆ The activation of the exhaust gas recirculation system is undertaken by the engine control unit (J448 or J537) via valve for exhaust gas recirculation (N18) to exhaust gas recirculation valve (mechanical).
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◆ Checking exhaust gas recirculation valve (N18).
=> Repair group 01; Final control diagnosis; Performing final control diagnosis
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◆ The conical plunger in the mechanical exhaust gas recirculation valve ensures that various cross sectional openings are possible at different plunger lifts.
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◆ Pulsed control makes every conceivable valve position possible.
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◆ Components marked with an * are checked via the self-diagnosis.
=> Repair group 01; Fault memory; Interrogating and erasing fault memory of engine control unit
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◆ Components marked with ** are checked via the final control diagnosis.
=> Repair group 01; Self-diagnosis; Final control diagnosis
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