John Deere 516317.06 – AIC (Armrest Interface Control Unit): AIC 12 V Sensor Supply 2 Current High

An overcurrent condition in the 12V sensor supply 2 circuit of the Armrest Interface Control Unit. The high current draw is typically caused by a short to ground, which can result from damaged wire insulation, exposed wiring, or faulty electrical connections, placing the system in a Function Degraded state.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8225R
• 8400R
• 8320RT
• 8345RT
• 8370RT
• 9360R
• 9560R
• 9470RT
• 9520RT
• 9570RT
• CH570
• CH670
• 3520

1. 1

   Cycle power: Turn off the tractor, cycle the key switch, and restart to see if the code clears or returns as an active fault.

2. 2

   Visual inspection: Inspect the wiring harness routed to the Armrest Interface Control Unit (AIC), specifically focusing on the 12V sensor supply 2 circuit. Look for chafed wires, damaged insulation, or pinched harnesses that could cause a short to ground.

3. 3

   Connector check: Disconnect the AIC connectors and inspect the pins for corrosion, moisture, or bent terminals.

4. 4

   Multimeter testing: Use a multimeter to test the 12V sensor supply 2 circuit for continuity to ground.

5. 5

   Sensor isolation: Disconnect the sensors powered by the Supply 2 circuit one by one. If the short to ground disappears (and the current drops) when a specific sensor is unplugged, that sensor is internally shorted and is the root cause.

1. 1

   Disconnect Power

   Disconnect the negative battery terminal before performing electrical repairs to prevent further module damage.

2. 2

   Repair Wiring

   If a short to ground was found in the harness during diagnostics, splice and repair the damaged wire using OEM-approved heat-shrink connectors, or replace the affected harness section.

3. 3

   Replace Faulty Sensor

   If a specific sensor on the 12V Supply 2 circuit was found to be internally shorted, remove and replace the sensor.

4. 4

   Replace the AIC

   If the wiring and sensors test perfectly fine, but the AIC continues to output high current/short internally, the Armrest Interface Control Unit itself has failed. Remove the armrest console covers, disconnect the multi-pin connectors from the AIC, unbolt and remove the old AIC module, and install the new AIC module and reconnect the harnesses.

5. 5

   Reassembly and Calibration

   Reconnect the battery. Note that installing a new AIC may require a John Deere Service ADVISOR tool to configure the Device ID Address and calibrate the armrest controls.

6. 6

   Clear Codes

   Clear the stored diagnostic trouble codes and test the armrest functions to verify the repair.