Komatsu PC130-7, Shop Manual

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