New Holland 19084: Power Supply Voltage 3 - Coolant Control Valve and Reverse Mechanism Valve (UB3) - Electrical - Short to Ground

The fault code indicates an electrical issue involving the power supply voltage 3, specifically a short to ground in the circuit associated with the coolant control valve and reverse mechanism valve (UB3). This may also involve the P20A2 vapor vent valve (air recharger control valve) and a short to a low voltage source.

1. 1

   The circuit for the coolant control valve and reverse mechanism valve (UB3)

2. 2

   The P20A2 vapor vent valve (air recharger control valve)

3. 3

   Connections and wiring related to the power supply voltage 3

1. 1

   Inspect the wiring and connections for the coolant control valve and reverse mechanism valve (UB3)

   Look for signs of damage, wear, or improper connections that could cause a short to ground.

2. 2

   Test the P20A2 vapor vent valve (air recharger control valve) for electrical faults

   Check for continuity and proper operation of the valve's electrical components.

3. 3

   Check for a short to ground in the power supply voltage 3 circuit

   Use a multimeter to test for unintended electrical paths to ground in the circuit.