Failure Code [Ca131] Throttle Sensor High Error - Komatsu Galeo PC138US-8 Shop Manual

SEN02463-01

Failure code [CA131] Throttle sensor high error

User code Failure code
E14
Contents of
• High voltage was detected in fuel control dial circuit.
trouble
Action of • Sets throttle angle with signal other than fuel control dial signal and continues operation
controller (depending on each model)
Problem that
appears on • Engine speed cannot be controlled with fuel control dial.
machine
• Signal voltage of fuel control dial can be checked with monitoring function.
Related
(Code: 03000 Fuel control dial voltage)
information
• Method of reproducing failure code: Turn starting switch ON.
Defective sensor power sup-
1
ply system
Defective fuel control dial
2
(Internal trouble)
Disconnection in wiring har-
ness
3 (Disconnection in wiring or
Possible causes
defective contact in connec-
and standard
tor)
value in normal
state
Ground fault in wiring har-
ness
4
(Short circuit with GND cir-
cuit)
5 Defective engine controller
18
Trouble
CA131
Causes
Throttle sensor high error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
If failure code [CA2185] or [CA2186] is indicated, carry out trouble-
shooting for it first.
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
P20 (male)
Between (1) – (3)
Between (2) – (1)
Between (2) – (3)
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)
Wiring harness between CE02 (female) (35)
– P20 (female) (2)
Wiring harness between CE02 (female) (28)
– P20 (female) (3)
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
Wiring harness between CE02 (female) (35)
– P20 (female) (2) and chassis ground
Wiring harness between CE02 (female) (28)
– P20 (female) (3) and chassis ground
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
CE02
Between (27) – (28)
Between (35) – (28)
40 Troubleshooting
Resistance
4.0 – 6.0 kz
0.25 – 5.0 kz
0.25 – 5.0 kz
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Power supply 4.75 – 5.25 V
Signal 0.5 – 4.5 V
PC138US, USLC-8
1
Max. 1 z
Max. 1 z
Max. 1 z
Min. 1 Mz
Min. 1 Mz
Min. 1 Mz
Voltage