Failure Code [Ca131] Throttle Sensor High Error - Komatsu Galeo PC800-8 Shop Manual

SEN00790-02

Failure code [CA131] Throttle Sensor High Error

Action code Failure code
E14 CA131
Contents of
• High error occurred in throttle sensor circuit.
trouble
Action of
• Use a signal other than throttle sensor to set the throttle position and continues operation.
controller
Problem that
appears on • Engine speed can not be controlled.
machine
Related • Signal voltage of the fuel control dial can be checked by monitoring function
information (Code No. 03000: voltage of fuel control dial)
Defective sensor power
1
supply system
Defective fuel control dial
2
(Internal defect)
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
24
Throttle Sensor High Error
Trouble
(Engine controller system)
Cause Standard value in normal state/Remarks on troubleshooting
If failure code [CA2185] or [CA2186] is displayed, carry out trouble-
shooting for it first.
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between CE02 (female) (22) –
P20 (female) (1)
Wiring harness between CE02 (female) (9) –
P20 (female) (2)
Wiring harness between CE02 (female) (23) –
P20 (female) (3)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between CE02 (female) (22) –
P20 (female) (1) and chassis ground
Wiring harness between CE02 (female) (9) –
P20 (female) (2) and chassis ground
Wiring harness between CE02 (female) (23) –
P20 (female) (3) and chassis ground
aPrepare with starting switch OFF, then turn starting switch ON and
carry out troubleshooting.
Between (22) – (23)
Between (9) – (23)
P20 (male)
Between (1) – (3)
Between (2) – (1)
Between (2) – (3)
CE02
Voltage
Signal
40 Troubleshooting
Resistance
4.0 – 6.0 kz
0.25 – 5.0 kz
0.25 – 5.0 kz
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Voltage
4.75 – 5.25 V
0.5 – 4.5 V
PC800, 850-8