Description:

This error code, TEI 000628.12, indicates that the control unit has switched to an incorrect mode, specifically boot mode. This typically happens when the control unit encounters an internal fault that prevents it from functioning correctly.

Reaction:

When this fault code is triggered, the control unit may cease normal operations and switch to a limited functionality mode or become entirely inoperative. This can affect the overall performance and control of the equipment.

Recommendations:

Inspect Control Unit Connections:

• Check all connections to the control unit for any signs of damage, loose connections, or corrosion. Secure and repair as necessary.

Reset the Control Unit:

• Perform a hard reset of the control unit by disconnecting the power supply for a few minutes and then reconnecting it. This can sometimes clear transient faults.

Update Control Unit Firmware:

• Ensure the control unit firmware is up-to-date. Download and install the latest firmware from the manufacturer’s website.

Replace the Control Unit:

• If the fault persists after resetting and updating the firmware, consider replacing the control unit as it may have a hardware failure.

Consult Technical Support:

• Contact John Deere technical support for further diagnostics and assistance. They may provide additional troubleshooting steps or confirm if a replacement is necessary.

Note:

Internal faults in control units can sometimes be triggered by electrical surges, software bugs, or hardware degradation. Regular maintenance and timely updates can help prevent such issues.