Doosan DX280 Excavator ECM Error Code 0100-03

Doosan Heavy Equipment Critical Engine

Model: DX280 Excavator ECM | Code: 0100-03

Applicable Systems
DX280 Excavator PUMA MX Series PUMA TT Series

Symptoms

The ECM detects the oil pressure sensor signal voltage is above 4.8V, indicating a short to battery positive. Engine power may be reduced and speed may decrease.

Possible Causes

  • Sensor signal wire shorted to battery positive or ground
  • Sensor internal failure producing out-of-range voltage
  • ECM connector corrosion causing cross-circuit between pins
  • Wiring harness chafing exposing conductor to power or ground

Troubleshooting Steps

  1. Step 1: Read active fault codes on the monitor panel or using ET (Electronic Technician)
    Fault code displayed as active with engine status
  2. Step 2: Disconnect the relevant sensor connector and measure signal pin voltage
    Voltage should be 0V with sensor disconnected; if battery voltage present, wiring is shorted
  3. Step 3: Inspect wiring harness from sensor to ECM for chafing or insulation damage
    No exposed conductors or insulation damage found
  4. Step 4: Replace the sensor if wiring checks good but fault persists after reconnection
    Fault clears after sensor replacement and key cycle

How to Reset

To reset: 1) Repair the short circuit or replace the faulty sensor. 2) Turn key OFF then ON. 3) Verify fault is no longer active. Caution: The ECM will use default values (600kPa for pressure, 90C for temperature) when sensor data is invalid, which may mask the real problem.

Frequently Asked Questions

  • Q: What does Doosan ECM fault code 0100-03 mean?

    Oil Pressure Sensor Short to Battery Positive. The ECM detects the oil pressure sensor signal voltage is above 4.8V, indicating a short to battery positive. Engine power may be reduced and speed may decrease.

  • Q: What default values does the ECM use when sensor data is invalid?

    The ECM uses 600kPa as default for fuel and oil pressure sensors, and 90 degrees C as default for coolant temperature. These defaults may not reflect actual conditions.

Related Doosan Fault Codes

Source: Doosan DX280 Excavator ECM Manual; 21-sun.com (China Construction Machinery Commerce Network); cehome.com; sohu.com

Category: Heavy Equipment