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Hitachi excavator engine idling unstable - engine stall

Jul 09, 2018

Hitachi excavator engine idling unstable - engine stall


[fault analysis]

DTC:P0117(scintillation code 23) coolant temperature sensor failure (low voltage)

(1) major fault phenomena:

It may emit black smoke when the temperature is normal.

In the process of idle running at low atmospheric temperature, the idle speed may be unstable, the engine stall and smoke white.

(2) standby mode:

(1) coolant temperature set by default (startup: - 20 ℃, runtime: 80 ℃).

(2) an EGR to stop.

[extensive reading]

DTC:P0118(scintillation code 23)

(1) major fault phenomena:

It may emit black smoke when the temperature is normal and make loud noises when burning.

In the process of idle running at low atmospheric temperature, the idle speed may be unstable, the engine stall and smoke white.

(2) standby mode:

(1) coolant temperature set by default (startup: - 20 ℃, runtime: 80 c).

(2) an EGR to stop.