Checking voltage supply for diesel direct injection system — VW

🧭 Before you start

Fits: platform code 6N1

🔧 Engine codes this applies to

📋 Procedure

1. Switch off ignition.
2. Connect adapter cable, 68-pinV.A.G 1598/18A to control unit wiring harness.
3. Bridge sockets 42+46 using auxiliary cables from auxiliary measuring setV.A.G 1594C.
4. Measure voltage between following sockets: 45+1, 68+1, 23+1 and 23+24.
5. Connect adapterV.A.G 1598/22 to control unit wiring harness.

6. Bridge sockets 33+1 using auxiliary cables from auxiliary measuring setV.A.G 1594C.
7. Measure voltage between following sockets: 2+1, 28+1, 27+2 and 28+27.
8. Check terminal 30 voltage supply relay J317.
9. Check cable connections for open circuit, short circuit and transfer resistance at contacts according to current flow diagram.
10. Renew diesel direct injection system control unit J248.

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