John Deere 168.01 – XMC: Steering Control Unit (AutoTrac™), Supply Voltage (BAT) Too Low

The control unit registers a supply voltage that has dropped below the normal operating range (typically below 9 to 11 volts). Because the supply voltage is too low, the control software will limit or disable certain AutoTrac™ functions to prevent damage and ensure safe operation.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 5M series
• 5090M
• 5100M
• 5115M
• 6M series
• 6R series
• 6125M
• 7R series
• 8R series

1. 1

   Verify the voltage of the battery with a multimeter to ensure it is above 9–11 volts.

2. 2

   Perform a load test on the battery to check its overall condition and charge level.

3. 3

   Inspect the wiring harness supplying power to the XMC module for any signs of damage, wear, or corrosion.

4. 4

   Ensure the alternator is functioning properly and providing adequate voltage to the system while the machine is running.

1. 1

   Address Wiring Issues

   If the diagnostic checks reveal damaged wiring or corroded connections leading to the XMC module, repair or replace the affected wiring.

2. 2

   Service the Battery

   If the battery is not holding a charge, is damaged, or fails a load test, replace the battery.

3. 3

   Service the Charging System

   If the alternator is failing to keep the system voltage in the normal operating range, repair or replace the alternator.

4. 4

   Clear the Code

   After repairs are made, cycle the key switch to restore power to the tractor and verify if the code clears.