John Deere 516316.06 – AIC (Armrest Interface Control Unit): AIC 12 V Sensor Supply 1 Current High

The current in the 12V sensor supply 1 circuit of the Armrest Interface Control Unit has exceeded safe levels. This abnormal current draw almost always indicates a short to ground within the circuit or a shorted sensor on that specific 12V supply line. The control unit responds by degrading or disabling functions to protect the circuit.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 7R Series Tractors
• 8225R
• 8245R
• 8270R
• 8295R
• 8320R
• 8335R
• 8345R
• 8370R
• 8400R
• 8320RT
• 8345RT
• 8370RT
• 9360R
• 9410R
• 9460R
• 9510R
• 9560R
• 9470RT
• 9520RT
• 9570RT
• CH570
• CH670
• 3520

1. 1

   Inspect the wiring harness connected to the Armrest Interface Control Unit (specifically the 12V Sensor Supply 1 circuit) for visible damage, chafing, pinched wires, or melted insulation that could cause a short to the chassis ground.

2. 2

   Perform a sensor isolation test by disconnecting the sensors on this circuit one at a time (such as throttle potentiometers, SCV lever sensors, or PTO switches). If the fault goes inactive or current drops to normal when a specific sensor is unplugged, that sensor is internally shorted.

3. 3

   Disconnect the harness from the AIC and test the 12V Supply 1 pin directly. If the AIC is outputting excessive current or shows an internal short to ground with nothing connected, the module itself has failed.

1. 1

   Disconnect Power

   Turn off the machine and disconnect the battery ground cable before performing electrical repairs.

2. 2

   Repair Wiring

   If a chafed or damaged wire was found during the harness inspection, repair the wire using OEM-approved splicing methods and heat-shrink tubing, or replace the affected harness section.

3. 3

   Replace Shorted Sensor

   If the isolation test identified a faulty sensor (e.g., a shorted SCV control lever sensor or throttle potentiometer), remove the defective sensor and install a new one.

4. 4

   Replace the AIC Module

   If the wiring and sensors test good but the AIC itself is internally shorted: Remove the armrest console covers to access the AIC module, disconnect the CAN/LIN bus and power connectors, unbolt and remove the faulty AIC, install the new AIC, and reconnect the harnesses.

5. 5

   Reassemble and Calibrate

   Reconnect the battery. Turn the key on and clear the stored fault codes. Note that a new AIC module will require configuration and calibration (such as Device ID Address and Armrest System Beep Mode) using John Deere Service ADVISOR.