Checking metering adjuster N146: Audi 2.5 TDI (ACV, AGX, AHD, AHY, …)

🧭 Before you start

Fits: platform codes 2DA, 2DB, 2DC, 2DD, 2DE, 2DF, 2DG, 2DH, 2DK, 2DL, 2DM

• Renewed: injection pump

🔧 Engine codes this applies to

📋 Procedure

1. Press key ← twice.
2. Press function "“06-End output”".
3. Switch off ignition.
4. Disconnect connector for metering adjuster (connection to injection pump metering system).
5. Measure resistance between connector contacts 5+6 (1). Specification: 0.5...2.5 Ω

6. Renew injection pump .
7. Connect test boxV.A.G 1598/18 to control unit wiring harness .
8. Check wiring between test box and connector (1) for open circuit referring to current flow diagram. Cable resistance: max. 1.5 Ω.
9. Additionally check wires for short to one another, to vehicle earth and to battery positive. Specification: ∞ Ω.
10. Renew diesel direct injection system control unit J248.
11. Measure resistance between connector contacts 5+6 (1). Specification: 0.5...2.5 Ω
12. Renew injection pump .
13. Connect test box to control unit wiring harness .
14. Check wiring between test box and connector (1) for open circuit referring to current flow diagram. Cable resistance: max. 1.5 Ω.
15. Additionally check wires for short to one another, to vehicle earth and to battery positive. Specification: ∞ Ω.
16. Renew diesel direct injection system control unit J248.

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