Komatsu PC130-8 User Manual

SEN04119-01 40 Troubleshooting
24 PC130-8
Failure code [CA131] Throttle sensor high error 1
User code Failure code
Trouble
Throttle sensor high error
(Engine controller system)
E14 CA131
Contents of
trouble
• High voltage was detected in fuel control dial circuit.
Action of
controller
• Sets throttle angle with signal other than fuel control dial signal and continues operation
(depending on each model)
Problem that
appears on
machine
• Engine speed cannot be controlled with fuel control dial.
Related
information
• Signal voltage of fuel control dial can be checked with monitoring function.
(Code: 03000 Fuel control dial voltage)
• Method of reproducing failure code: Turn starting switch ON.
Possible causes
and standard
value in normal
state
Causes Standard value in normal state/Remarks on troubleshooting
1
Defective sensor power sup-
ply system
If failure code [CA2185] is indicated, carry out troubleshooting for it
first.
2
Defective fuel control dial
(Internal trouble)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
P20 (male) Resistance
Between (1) – (3) 4.0 – 6.0 kz
Between (2) – (1) 0.25 – 5.0 kz
Between (2) – (3) 0.25 – 5.0 kz
3
Disconnection in wiring har-
ness
(Disconnection in wiring or
defective contact in connec-
tor)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CE02 (female) (27)
– P20 (female) (1)
Resis-
tance
Max. 1 z
Wiring harness between CE02 (female) (35)
– P20 (female) (2)
Resis-
tance
Max. 1 z
Wiring harness between CE02 (female) (28)
– P20 (female) (3)
Resis-
tance
Max. 1 z
4
Ground fault in wiring har-
ness
(Short circuit with GND cir-
cuit)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CE02 (female) (27)
– P20 (female) (1) and chassis ground
Resis-
tance
Min. 1 Mz
Wiring harness between CE02 (female) (35)
– P20 (female) (2) and chassis ground
Resis-
tance
Min. 1 Mz
Wiring harness between CE02 (female) (28)
– P20 (female) (3) and chassis ground
Resis-
tance
Min. 1 Mz
5 Defective engine controller
a
Prepare with starting switch OFF, then turn starting switch ON
an
d carry out trou
bleshooting.
CE02 Voltage
Between (27) – (28) Power supply 4.75 – 5.25 V
Between (35) – (28) Signal 0.5 – 4.5 V

Komatsu PC130-8 Specifications

General

Brand	Komatsu
Model	PC130-8
Category	Excavators
Language	English