Description:

The error code, ATC 000170.03, indicates an excessive voltage measurement, exceeding 5 volts, at the signal input of the inside air temperature sensor (B127, lead 2007). This condition typically suggests that the circuit may be shorted to a supply lead or could be open, leading to unreliable sensor performance and potential issues with temperature regulation within the cabin.

Reaction:

The high voltage detected at the inside air temperature sensor may cause the HVAC (Heating, Ventilation, and Air Conditioning) system to malfunction, leading to inappropriate cabin temperature controls or complete failure of temperature regulation.

Recommendations:

• Inspect Wiring and Connections: Check for any signs of short circuits, such as damaged insulation or wires touching power leads, especially around lead 2007 and sensor B127.
• Verify Sensor and Circuit Integrity: Use a multimeter to measure the voltage at the sensor’s input. A reading consistently above 5 volts can confirm a short to power or an open circuit.
• Replace Faulty Sensor if Necessary: If the sensor or wiring is found to be defective, replace them to ensure proper functionality.
• Check for Corrosion or Loose Connections: Ensure that all related connectors are free from corrosion and are securely connected, as these issues can also lead to voltage irregularities.
• System Reset and Function Check: After repairs, reset any fault codes and check the HVAC system to ensure it is operating correctly and that the cabin temperature is being regulated properly.

Note:

Regular maintenance and checks of the HVAC system’s electrical components can prevent issues related to incorrect voltage readings and ensure a comfortable and controlled cabin environment. It’s important to address these types of electrical issues quickly to maintain the operational efficiency and comfort inside your John Deere machinery.