This guide provides a step-by-step process to troubleshoot and resolve Error Code P025C – DPM System Under Voltage Error in your Doosan machine.
Preparations:
Doosan Data Monitoring System DMS-5 DMS-3 Free Download
1. Error Details
- Error Code: P025C
- Reason: Battery voltage is below the limit (11V).
- Effect: Torque limit: 0, SVS: B.
2. Circuit Description
- Signal Pin: 142
- Ground (GND): Pin 133
- Sensor Type: Resistive sensor
- Voltage Specifications:
- Separation: 5V
- Connection: 0–5V
3. Component Location
Refer to your Doosan service manual for the exact location of the DPM system components and related wiring harnesses.
4. Requirements to Perform Diagnosis
- Ensure the key is ON or the engine is running during the diagnosis process.
5. Conditions for Error Code Activation
- The error code triggers if the battery voltage falls below 10,000 mV (10V) for 500 ms.
6. Conditions for Clearing the Error Code
- The error code clears automatically when the battery voltage rises above 11,000 mV (11V) for 500 ms.
7. Diagnostic Checklist
- Inspect Battery Voltage
- Use a multimeter to measure the battery voltage. Ensure it meets the required minimum threshold (11V).
- Check Battery Health
- Confirm the battery is fully charged and capable of maintaining sufficient voltage.
- Replace the battery if it is old, weak, or damaged.
- Inspect Electrical Connections
- Verify all connectors at Pin 142 and Pin 133 are secure and free of corrosion.
- Check for loose or damaged wiring. Repair or replace as necessary.
- Test the Charging System
- Confirm the alternator is functioning correctly and charging the battery to the appropriate voltage.
- Check for Additional Loads
- Ensure no excessive electrical loads are causing a voltage drop in the system.
- Sensor and Circuit Inspection
- Test the resistive sensor using the specifications (0–5V range).
- Inspect the circuit for any faults or disconnections.
More topics for Doosan,please refer to:Doosan Trouble Repair
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