John Deere 523923.03 – ACU (Armrest Control Unit) / AIC (Arm Rest Module or Cab Module): SCV I Control Lever Sensor Circuit Voltage High

The control module has detected an abnormally high voltage or a circuit conflict coming from the sensor/switch that operates the #1 Selective Control Valve (SCV) lever.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 7630
• 7720
• 7730
• 7820
• 7830
• 7920
• 7930
• 8310RT
• 8335RT
• 8360RT
• 9230
• 9330
• 9430
• 9530
• 9630
• 7185J
• 7195J
• 7205J
• 7210J
• 7225J

1. 1

   Perform a system reset by placing the tractor in park, shutting off the engine, and restarting it to see if communication messages reset.

2. 2

   Inspect the wiring harness leading to the SCV I control lever switch inside the armrest for pinched wires, electrical shorts, or damaged insulation.

3. 3

   Ensure the electrical connector to the SCV I sensor is not loose and check the terminals for corrosion.

1. 1

   Temporary Bypass

   If you need to finish a task immediately, go to the CommandARM display and disable the single lever control for SCV I.

2. 2

   Access the Armrest Console

   Power down the tractor. Remove the fastening bolts located on the bottom of the CommandARM console.

3. 3

   Lift the Console Lid

   Carefully lift the top half of the armrest console to expose the internal switches and wiring.

4. 4

   Remove the Faulty Switch

   Locate the SCV I switch assembly. Remove the mounting screws and unplug the wiring harness from the switch.

5. 5

   Install the New Part

   Plug the harness into the new SCV I control lever switch, seat it into the console, and secure it with the screws.

6. 6

   Reassemble and Test

   Bolt the armrest console back together, start the tractor, and verify that the 523923.03 code has cleared and the SCV operates normally.