New Holland 19082 – New Holland Dosing Control Unit Dcu: Voltage supply 3 – coolant control valve and reverting valve (UB3) electrical – short to bat at UB3 with key 15 off – P20A3 vent valve (reductant purge control valve) – short circuit high

The system detects a short circuit in the high voltage supply for the coolant control valve and reverting valve (UB3), as well as the P20A3 vent valve (reductant purge control valve) when the key 15 is off. This indicates an electrical fault in the wiring or connections related to these components.

1. 1

   Wiring and connections for the coolant control valve and reverting valve (UB3)

2. 2

   Wiring and connections for the P20A3 vent valve (reductant purge control valve)

3. 3

   Presence of a short circuit in the voltage supply 3 circuit

1. 1

   Inspect

   Inspect the wiring and connections for the coolant control valve and reverting valve (UB3) for damage, wear, or improper connections.

2. 2

   Inspect

   Inspect the wiring and connections for the P20A3 vent valve (reductant purge control valve) for damage, wear, or improper connections.

3. 3

   Test

   Test the voltage supply 3 circuit for a short to battery using a multimeter or diagnostic tool.