Checking exhaust gas recirculation and air mass meter function — AUDI

🧭 Before you start

Fits: platform codes 70A, 70B, 70C, 70E, 70H, 70J, 70K, 70L, 70M, 7DA, 7DB, 7DC, 7DE, 7DH, 7DJ, 7DK, 7DL, 7DM

Don't miss

• Connect fault readerV.A.G 1551 and select engine electronics control unit with "“address word 01”". Engine must be idling.
• If "“Function is unknown or cannot be performed at this moment”" appears in display, check exhaust gas recirculation and air mass meter function via final control diagnosis .

🔧 Engine codes this applies to

📐 20 workshop diagrams for ACV

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Connect fault readerV.A.G 1551 and select engine electronics control unit with "“address word 01”". Engine must be idling.
2. Press keys 0 and 4 for function "“Initiate basic settings”" and confirm entry with Q key.
3. Press keys 0, 0 and 3 for "“Display group number 3”" and confirm entry with Q key. [Note: If "“Function is unknown or cannot be performed at this moment”" appears in display, check exhaust gas recirculation and air mass meter function via final control diagnosis .] [Note: If a constant value of 550 mg/H (fixed substitute value) is displayed in display zone 3, check air mass meter .]
4. Specification: Display zone 3 400… 550 mg/stroke
5. Specification: Display zone 4 0… 5 %

6. Specification: Display zone 3 150… 350 mg/stroke
7. Specification: Display zone 4 95… 100 %
8. Specification: Display zone 3 450...470 mg/stroke
9. Specification: Display zone 4 0… 5 %
10. Specification: Display zone 3 240… 280 mg/stroke
11. Specification: Display zone 4 95… 100 %
12. Specification: Display zone 3 440… 490 mg/stroke
13. Specification: Display zone 4 0… 5 %
14. Specification: Display zone 3 220… 270 mg/stroke
15. Specification: Display zone 4 95… 100 % [Note: Displays in display zone 3 are pressure-dependent and therefore elevation-dependent. The specified values refer to 0 m MSL. If the measured values deviate greatly due to the altitude, check whether a specification difference of min. 100 mg/H is achieved between displays for EGR.active and EGRn.active in display zone 3.]
16. Check mechanical exhaust gas recirculation valve Rep. Gr. 26; Exhaust gas recirculation system; Checking exhaust gas recirculation valve
17. Check air mass meter and exhaust gas recirculation valve .
18. Press → key.
19. Carry out a road test .

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