Article topic: Komatsu excavator working engine speed is not controlled, fault analysis and troubleshooting.
Fault phenomenon: Komatsu excavator has been used for about 5400 hours, and the excavator engine speed is not controlled, and the fault code mid187sid254fmi2 appears on the display The response from the control component is' fault code set by 65533 '
Failure analysis:
In general, the possible reasons for uncontrolled engine speed are:
1. Internal failure of the control assembly
2. The power supply cable is short circuited or open circuited to UBAT
Troubleshooting:
1. Check cables and connectors
2. Replace the engine control assembly
Add: the condition of uncontrolled engine speed of Komatsu excavator is that 'the excavator control unit (v-ecu) records the internal wrong vehicle'.
