Common fault code analysis, fault phenomenon

01 Excavation of EEPROM abnormality of EEPROM

02 Excavator RAM abnormality (random access memory)

03 Excavator AC/DC conversion is abnormal

04 Excavator sensor voltage is abnormal

05 Excavator N sensor is abnormal

06 Excavator EC sensor abnormal

07 Excavator engine control dial pointer angle is abnormal

08 Excavator engine control dial pointer angle is abnormal

09 Excavator pump 1 displacement angle is abnormal

10 Excavator pump 2 abnormal displacement angle

11 Excavator pump 1 abnormal oil delivery pressure

12 Excavator pump 2 abnormal oil delivery pressure

13 Excavator pump 1 control pressure is abnormal

14 Excavator pump 2 control pressure is abnormal

15 Excavator rotation pilot pressure is abnormal

16 Excavating mobile arm lifting pilot pressure is abnormal

17 Excavator stick retracts with abnormal pilot pressure

18 Excavator walking pilot pressure is abnormal

19 Excavator hydraulic oil temperature is abnormal

20 Excavator pump 1 swash plate angle control failure

21 Excavator pump 2 swash plate angle control failure

Common cases of Doosan excavator fault codes

(1) Excavator fault code 0091-08: throttle position signal is abnormal

① The main fault phenomenon must use the spare throttle switch to set the speed of the diesel engine.

②Fault reason: ECM detects that the throttle signal frequency is greater than 2000Hz or less than 150Hz for 2s.

③ System reaction: ECM will record the fault code, and the fault code can be viewed on the display module or ET. ECM marks the throttle position as invalid data.

Before one of the following conditions occurs, maintain the recent diesel engine speed to the required diesel engine speed.

a. ECM receives different diesel engine speed signals from the backup throttle switch.

b. The signal from the throttle switch becomes effective and stays for more than 2s.

(2) Excavator fault code 0094-03: Fuel pressure sensor and battery positive electrode open circuit and short circuit

① The main fault phenomenon Diesel engine is stopped or not running.

②Fault reason: ECM detected all the following conditions:

a. ECM reads the signal voltage higher than 4.8V for 8s;

b. The power supply to the ECM has been at least 2s;

c. The 5V sensor power supply line and battery positive short-circuit fault code 0262-03 does not currently exist;

d. The 5V sensor power supply line and ground short-circuit fault code 0262-04 do not currently exist;

e. The diesel engine is not running or the diesel engine has been running for at least 3 minutes.

③ The system responds that ECM will record the fault code, you can view the fault code on the display module or ET. ECM will

The fuel pressure is marked as invalid data, and the pressure of 600kPa is used as the default value.

(3) Fault code 0094-04: Fuel pressure sensor is shorted to ground

① The main fault phenomenon Diesel engine is stopped or not running.

② Failure cause ECM detected all the following conditions:

a. ECM read signal voltage higher than 4.8V for 8s;

b. The power supply to the ECM has been at least 2s;

c. The 5V sensor power supply line and battery positive short-circuit fault code 0262-03 does not currently exist;

d. The 5V sensor power supply line and ground short-circuit fault code 0262-04 do not currently exist;

e. The diesel engine is not running or the diesel engine has been running for at least 3 minutes.

③ The system responds that the ECM will record the fault code, and the fault code can be viewed on the display module or ET. The ECM marks the fuel pressure as invalid data and uses the pressure of 600 kPa as the default value.

(4) Fault code 0100-03: oil pressure sensor and battery positive open/short circuit

①Main fault phenomenon

a. Diesel engine runs at low power.

b. The speed of the diesel engine decreases.

② Failure cause ECM detected all the following conditions:

a. ECM read signal voltage higher than 4.8V for 8s;

b. The power supply to the ECM has been at least 2s;

c. The 5V sensor power supply line and battery positive short-circuit fault code 0262-03 does not currently exist;

d. The 5V sensor power supply line and ground short-circuit fault code 0262-04 do not currently exist;

e. The diesel engine is not running.

③ The system responds that ECM will record the fault code, and the fault code can be viewed on the display module or ET. The ECM marks the oil pressure as invalid data and uses the pressure of 600kPa as the default value.

(5) Fault code 0100-04: The oil pressure sensor is shorted to ground

①Main fault phenomenon

a. Diesel engine runs at low power.

b. The speed of the diesel engine decreases.

② Failure cause ECM detected all the following conditions:

a. ECM reads the signal voltage higher than 0.2V for 18s;

b. The power supply to the ECM has been at least 2s;

c. The short-circuit fault code 0262-03 of the 5V sensor power supply line and the battery positive pole does not currently exist;

d. The 5V sensor power supply line and ground short-circuit fault code 0262-04 do not currently exist;

e. The diesel engine is not running.

③ The system responds that ECM will record the fault code, and the fault code can be viewed on the display module or ET. ECM marks the oil pressure as invalid data and adopts

Use the pressure of 600kPa as the default value.

(6) Fault code 0110-03: Coolant temperature sensor and battery positive open/short circuit

①Main fault phenomenon

a. Diesel engine will not enter cold mode.

b. The diesel engine does not catch fire.

c. Low-power operation of diesel engine.

d. The speed of the diesel engine decreases.

② Cause of failure ECM detected all the following conditions:

a. ECM reads the signal voltage above 4.92V for 8s;

b. The power supply to the ECM has been at least 2s.

③ The system responds that ECM will record the fault code, and the fault code can be viewed on the display module or ET. ECM marks the coolant temperature as invalid data and uses the temperature of 90℃ as the default value.

(7) Fault code 0110-04: coolant temperature sensor is shorted to ground

①Main fault phenomenon

a. The diesel engine does not catch fire.

b. Low-power operation of diesel engine.

c. The speed of the diesel engine decreases.

② Cause of failure ECM detected all the following conditions:

a. ECM reads the signal voltage below 0.2V for 8s.

b. The power supply to the ECM has been at least 2s.

③ The system responds that BCM will record the fault code, and the fault code can be viewed on the display module or ET. ECM marks the coolant temperature as invalid data, and uses the temperature of 90℃ as the default value. The diesel engine will not enter cold mode.