Deutz-Fahr 1079: DEF Dosing Valve Circuit Fault

The fault code indicates a short circuit to ground or an open load on the low side of the DEF dosing valve. It also suggests a ground short circuit or cable break on the minus side of the circuit.

1. 1

   DEF dosing valve

2. 2

   cable connections to the DEF dosing valve

3. 3

   ground connections related to the DEF dosing valve

4. 4

   wiring for the minus side of the circuit

1. 1

   Inspect

   Check the DEF dosing valve for visible damage or wear.

2. 2

   Inspect

   Examine the cable connections to the DEF dosing valve for looseness, corrosion, or breaks.

3. 3

   Inspect

   Verify the ground connections related to the DEF dosing valve for proper contact and integrity.

4. 4

   Inspect

   Check the wiring for the minus side of the circuit for any breaks or damage.

5. 5

   Test

   Use a multimeter to test for continuity and resistance in the circuit as per the service manual.