Servicing parts of exhaust gas recirculation system — VW

🧭 Before you start

• Special tools named: V.A.G 1552, V.A.G 1551

📋 Procedure

1. Connect fault reader V.A.G 1551(V.A.G 1552). Start engine and select engine control unit with word address "“01”". Connect fault reader and select engine control unit 01Self-diagnosis overview: Connecting fault reader V.A.G 1551 and selecting engine control unit
2. Press keys 0 and 4 for the function "Basic setting" and confirm entry with Q key.
3. Press keys 7 and 5 for the "“Display group number 75”" and confirm entry with Q key.
4. When the diagnosis is initiated by the engine control unit, the display in display zone 4 jumps from "Test OFF" to "Test ON".
5. Continue to run engine at idling speed until the specification "Syst. OK" is displayed in display zone 4.

6. Interrogate fault memory 01Fault memory; Interrogate and erase fault memory
7. Check the function of exhaust gas recirculation valve 01Final control diagnosis; Performing final control diagnosis
8. Check exhaust gas recirculation potentiometer.
9. Press → key.
10. Press keys 0 and 6 for the function "“End output”" and confirm entry with the Q key.

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