Description:

This diagnostic trouble code (DTC) UIC 001079.04 is generated when less than 4.5 volts are measured at the positive power supply lead 6033 for 5-volt components (potentiometers for brake pedal, clutch pedal, speed control lever, accelerator pedal, and hand throttle) over a period of more than one second. This indicates a short to ground.

Reaction:

When this error occurs, the control unit may limit or disable the functionality of the affected components to prevent potential damage or unsafe operation.

Recommendations:

• Inspect Power Supply Lead:
  • Check the positive power supply lead 6033 for any signs of damage, corrosion, or short to ground.
  • Ensure all connectors are securely attached and free from debris.
• Check for Short to Ground:
  • Use diagnostic tools to detect any short to ground in the wiring connected to the 5-volt components.
  • Isolate and repair any identified shorts to ground.
• Replace Faulty Components:
  • If specific components are found to be causing the undervoltage, replace them as necessary.
• Consult Technical Support:
  • If the issue persists, contact John Deere technical support for further diagnostics and potential solutions.

Note:

Regular inspection and maintenance of the power supply leads and components can help prevent undervoltage issues.