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Home >> Volkswagen >> 1997 >> Cabrio Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Exhaust System, Emission Controls - 1.9L 4-CYL. 2V TDI - AAZ, 1Z, AHU (A3 Platform)) >> Exhaust System, Emission Controls >> Exhaust Gas Recirculation (EGR) system, servicing (engine code 1Z) >> Notes

Exhaust Gas Recirculation (EGR) system, servicing (engine code 1Z): Notes

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NOTE:
  • Functional control of Exhaust Gas Recirculation (EGR) system is performed by Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) -J248- via the EGR vacuum regulator solenoid valve -N18-.
  • Check EGR vacuum regulator solenoid valve - N18- using Output Diagnostic Test Mode (DTM).
  • The cone shaped plunger in the mechanical EGR valve enables various cross sectional openings at different plunger heights.
  • Every conceivable valve position is possible via pulsed control.
  • Always replace self-locking nuts.
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