Case IH DCU19082: Voltage Supply 3 - Coolant Control Valve and Reverting Valve (UB3) Electrical Short to Battery

A short circuit is detected in the electrical system related to the Voltage supply 3 for the Coolant control valve and reverting valve (UB3) when Key 15 is off. Additionally, a short circuit high is reported for the P20A3 Vent valve (Reductant Purge Control Valve).

1. 1

   The wiring and connections for the Coolant control valve and reverting valve (UB3)

2. 2

   The wiring and connections for the P20A3 Vent valve (Reductant Purge Control Valve)

3. 3

   The integrity of the Voltage supply 3 circuit

1. 1

   Inspect

   Inspect the wiring and connections for the Coolant control valve and reverting valve (UB3) for signs of damage, wear, or short circuits.

2. 2

   Inspect

   Inspect the wiring and connections for the P20A3 Vent valve (Reductant Purge Control Valve) for signs of damage, wear, or short circuits.

3. 3

   Test

   Test the Voltage supply 3 circuit for continuity and insulation resistance to identify any short circuits.