Description:

The ECU 000101.03 (101.03) error code on John Deere equipment indicates that the crankcase pressure sensor signal is abnormally high, suggesting a short to 12 volts in the sensor’s circuit. This electrical fault may distort the actual crankcase pressure readings, leading to incorrect engine management decisions. Accurate diagnostics are crucial, and referring to the relevant Component Technical Manual (CTM) for your specific diesel engine model is recommended for detailed troubleshooting steps.

Reaction:

The engine control system might interpret this faulty signal as a critical condition, potentially causing the engine to operate in a protective mode to prevent perceived damage due to high crankcase pressure.

Recommendations:

• Consult the Component Technical Manual (CTM): Use the specific CTM for your engine model to follow detailed diagnostic procedures.
• Inspect Wiring and Electrical Connections: Check the sensor wiring and connections for signs of damage or wear that could result in a short to 12 volts.
• Test the Crankcase Pressure Sensor: Utilize diagnostic equipment to assess the functionality of the crankcase pressure sensor. Confirm whether the high signal is due to a sensor or circuitry issue.
• Replace Faulty Sensor or Repair Wiring: If testing identifies issues with the sensor or wiring, replace the damaged components with genuine John Deere parts.
• Reset the System and Verify Correct Operation: After repairs, reset the engine control system to clear the error and perform a comprehensive test to ensure that the sensor now accurately reflects the crankcase pressure.

Note:

It is essential to address any electrical issues in the sensor circuit promptly to avoid misinterpretations that could lead to unnecessary engine shutdowns or restricted operation. Regular maintenance checks should include a review of the electrical systems associated with engine sensors to prevent similar issues. Maintaining clean and secure electrical connections and ensuring that wiring is free from damage are key preventive measures.