Checking air mass meter: Audi 2.5 TDI (ACV, AHY, AJT, AUF, …)

🧭 Before you start

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

🔧 Engine codes this applies to

📋 Procedure

1. Press → key.
2. Press keys 0 and 6 for function "“End data transfer”" and confirm entry with Q key.
3. Switch off ignition.
4. Separate connector for air mass meter
5. Switch on ignition.

6. Measure air mass meter voltage supply between following connector contacts:
7. Measure air mass meter voltage supply between following connector contacts:
8. Switch off ignition.
9. Connect test boxV.A.G 1598/18 to control unit wiring harness.
10. Check lines between test boxV.A.G 1598/18 and connector for open circuit using current flow diagram. Contact 1+socket 19, contact 2+socket 33, contact 3+socket 23, contact 5+socket 1, contact 6+socket 13, line resistance: Max. 1.5 Ω
11. Check lines between test boxV.A.G 1598/18 and connector for open circuit using current flow diagram. Contact 2+ sockets 23, 45, 68, contact 3+ socket 21, contact 4+ socket 19, contact 5+ socket 13, line resistance: Max. 1.5 Ω
12. Also check wiring for short to one another, short to vehicle earth and short to battery positive. Specification: ∞ Ω
13. Check exhaust gas recirculation valve .

Other AUDI procedures

• Checking coolant temperature sender G62
• Checking clutch pedal switch F36 – Audi A6 C5
• Removing and installing radiator and fan – Audi 2.5 TDI
• Removing and installing fuel gauge sender · 1 torque figures
• Checking exhaust gas recirculation and air mass meter function
• Removing and installing toothed belt – Audi · 56 torque figures
• Removing engine – Audi A8 D3 · 41 torque figures
• Removing camshaft timing chain from camshafts – Audi A6/A7 C7 · 38 torque figures
• Installing engine – Audi A8 D4 · 36 torque figures
• Removing and installing camshaft timing chain · 29 torque figures