Engine Stops During Operation - Komatsu PC130-7 Shop Manual

TROUBLESHOOTING
E-2 Engine stops during operation
Trouble

• Engine stops during operation.

Related • The input state (Voltage) from the governor potentiometer can be checked with the monitoring function.
information (Code: 031, by 10 mV)
Defective governor
1 potentiometer
(Internal defect)
Disconnection in wiring
harness
Possible causes
2 (Disconnection in wiring
and standard
harness or defective con-
value in normal
tact in connector)
state
Short circuit with chassis
ground in wiring harness
3
(Contact with ground
circuit)
Defective governor and
4
pump controller
20-408
(1)
Cause Standard value in normal state/Remarks on troubleshooting
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Wiring harness between C01 (female) (13) and
E10 (female) (B)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Between C01 (female) (13) – E10 (female) (B)
wiring harness and chassis ground
aPrepare with starting switch OFF, then turn starting switch ON and car-
ry out troubleshooting.
Between (22) and (21)
Between (13) and (21)
E10 (male)
Between (A) and (C)
Between (B) and (A)
Between (B) and (C)
C01
Power supply
Signal
E-2
Resistance
4.0 – 6.0 z
0.25 – 5.0 z
0.25 – 5.0 z
Max. 1 z
Resistance
Min. 1 Mz
Resistance
Voltage
4.5 – 5.5 V
0.5 – 4.5 V
PC130-7