ECU 002629.03 – Compressor Outlet Temperature Signal Out Of Range High. John Deere System Advisory.

ECU 002629.03 (ECU 2629.03)

Code: 002629.03

Shortcode: 2629.03

Description:

Error code ECU 002629.03 is triggered when the compressor outlet temperature signal is detected to be out of range high, indicating a short to 12 volts. This erroneous signal can imply overheating or an electrical fault in the compressor’s temperature monitoring circuit.

Reaction:

The ECU may respond by adjusting or limiting engine performance to prevent damage due to perceived overheating, which might not reflect actual physical conditions.

Recommendations:

  • Inspect Temperature Sensor Wiring: Check for damaged wires or loose connections that could result in a short to 12 volts.
  • Measure Voltage at Sensor: Use a multimeter to verify the voltage at the compressor outlet temperature sensor. Correct voltage should align with manufacturer specifications.
  • Replace Faulty Sensor: If diagnostics confirm a fault with the temperature sensor itself, replace it to ensure accurate temperature readings.
  • Check ECU Inputs and Outputs: Ensure that the ECU is processing and outputting signals correctly. Consider reprogramming or replacing the ECU if faults are detected.
  • Reset ECU and Re-test: After repairs, reset the ECU to clear the fault code and conduct a test under operational conditions to ensure the issue is resolved.

Note:

Regular maintenance and checks of the sensor and wiring integrity can prevent false alarms and ensure accurate temperature monitoring.


Control Units: John Deere

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