Komatsu PC130-8 User Manual

SEN04121-02 40 Troubleshooting
12 PC130-8
Failure code [DGH2KB] Hydr oil sensor short 1
Circuit diagram related
User code Failure code
Trouble
Hydraulic oil temperature sensor short
(Pump controller system)
— DGH2KB
Contents of
troubl
e
• Ground fault was detected in hydraulic
oil temperature sensor circuit.
Action of
controller
• Controls pump in normal mode (as when hydraulic oil temperature is 20°C to below 95°C). 
(Overheat prevention function does not work.)
Problem that
a
ppears on
machine
• While hydraulic oil temperature rises normally, hydraul
ic oil temperature gauge does not move from
top of white range (bottom of green range).
Related
information
• Signal voltage of hydraulic oil temperature sensor can be checked with monitoring function. 
(Code: 04
402 Hydraulic oil temperature sensor voltage)
• Method of reproducing failure code: Start engine.
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Defective hydraulic oil tem-
perature sensor (Internal dis-
connection or short circuit)
a Prep
are with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
P22 (male) Resistance
Between (1) – (2) 3.5 – 90 kz
Between (2) – chassis ground Min. 1 Mz
2
Ground fault in wiring har-
ness (Short circuit with GND
circuit)
a Prep
are with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CP01 (female) (29)
– P22 (fe
male) (2) and chassis ground
Resis-
tance
Min. 1 Mz
3 Defective pump controller
a Prep
are with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CP01 (female) Resistance
Between (29) – (46) 3.5 – 90 kz
Between (29) – chassis ground Min. 1 Mz

Komatsu PC130-8 Specifications

General

Brand	Komatsu
Model	PC130-8
Category	Excavators
Language	English