Komatsu Galeo PC138US-8 User Manual

40 Troubleshooting SEN02467-00
PC138US, USLC-8
25
E-11 Fuel level gauge does not indicate normally 1
Circuit diagram related
Trouble
(1) While fuel is added, fuel level gauge does not rise from red range (E).
(2) While fuel level is low, fuel level gauge does not lower from green range top (F)
Related
information
• Signal voltage of fuel level sensor can be checked with monitoring function.
(Code: 04200 Fuel level sensor voltage)
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Defective fuel level sensor
(Internal disconnection or
short circuit)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
P21 (male) Fuel level Resistance
Between (1) –
chassis ground
FULL 7 – 11 z
EMPTY 85 – 95 z
2
Disconnection in wiring har-
ness (Disconnection in wiring
or defective contact in con-
nector)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CM01 (female) (9)
– P21 (female) (1)
Resis-
tance
Max. 1 z
3
Ground fault in wiring har-
ness (Short circuit with GND
circuit)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CM01 (female) (9)
– P21 (female) (1)
Resis-
tance
Min. 1 Mz
4
Hot short (Short circuit with
24V circuit) in wiring harness
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Wiring harness between CM01 (female) (9)
– P21 (female) (1)
Voltage Max. 1 V
5 Defective machine monitor
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CM01 (female) Fuel level Resistance
Between (9) –
chassis ground
FULL 7 – 11 z
EMPTY 85 – 95 z

Komatsu Galeo PC138US-8 Specifications

General

Brand	Komatsu
Model	Galeo PC138US-8
Category	Excavators
Language	English