Check wires to control module

• Connect test box to control module wiring harness. Refer to Test box, connecting for wiring test  .

Vehicles with 80-pin control module 

• Check for open circuits in wires between test box and connector according to wiring diagram.

Terminal 4 + socket 76

Terminal 7 + socket 53

Wire resistance: max. 1.5 Ω

Vehicles with 121-pin control module 

• Check for open circuits in wires between test box and connector according to wiring diagram.

Terminal 7 + socket 111

Terminal 4 + socket 103

Wire resistance: max. 1.5 Ω

Vehicles with 154-pin control module 

• Connect adapter cable (V.A.G 1598/39-1) to test box (V.A.G 1598/42).

• Check for open circuits in wires between test box and connector according to wiring diagram.

Terminal 1 + socket 40

Terminal 2 + socket 39

Wire resistance: max. 1.5 Ω

Continue for all vehicles 

• Check wires for short circuit to each other, to vehicle Ground (GND) and to B+.

Specified value: ∞ Ω

If no malfunctions are found in wires:

• Replace Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) -J248-. Refer to Control module for Diesel-Direct Fuel Injection System, replacing  .
• Generate readiness code.