Failure Code [Ca135] Eng Oil Press Sensor High Error - Komatsu Galeo PC800-8 Shop Manual

SEN00790-02

Failure code [CA135] Eng Oil Press Sensor High Error

Action code Failure code
E15 CA135
Contents of
• High pressure error occurred in engine oil pressure sensor circuit.
trouble
Action of
• Sets oil pressure to default (250 kPa {2.5 kg/cm
controller
Problem that
appears on • Starting performance of the engine lowers during low temperature.
machine
Related • Signal voltage of the oil pressure sensor can be checked by monitoring function
information (Code No. 37201: oil pressure sensor voltage)
Defective sensor power
1
supply system
Defective oil pressure sen-
2 sor
(Internal defect)
Disconnection in wiring har-
ness
3 (Disconnection in wiring or
defective contact in connec-
tor)
Possible causes
and standard
Ground fault in wiring har-
value in normal
ness
state
4
(Short circuit with GND cir-
cuit)
Short circuit in wiring har-
ness
5
(with another wiring har-
ness)
56 Defective engine controller
28
Eng Oil Press Sensor High Error
Trouble
(Engine controller system)
Cause Standard value in normal state/Remarks on troubleshooting
If failure code [CA187] or [CA227] is displayed, carry out troubleshoot-
ing for it first.
Prepare with starting switch OFF, then turn starting switch ON or start
engine and carry out troubleshooting in each case.
Between (1) – (2)
Sensor voltage is measured with wiring harness connected. Accord-
ingly, if voltage is abnormal, check wiring harness and controller, too, for
another cause of trouble, and then judge.
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between ENG (female) (37) –
POIL (female) (1)
Wiring harness between ENG (female) (47) –
POIL (female) (2)
Wiring harness between ENG (female) (13) –
POIL (female) (3)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Between wiring harness of ENG (female) (37) –
POIL (female) (1) and chassis ground
Between wiring harness of ENG (female) (47) –
POIL (female) (2) and chassis ground
Between wiring harness of ENG (female) (13) –
POIL (female) (3) and chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between ENG (female) (37) –
POIL (female) (1) and between ENG
(female) (47) – POIL (female) (2)
Wiring harness between ENG (female) (37) –
POIL (female) (1) and between ENG
(female) (13) – POIL (female) (3)
Wiring harness between ENG (female) (47) –
POIL (female) (2) and between ENG
(female) (13) – POIL (female) (3)
aPrepare with starting switch OFF, then turn starting switch ON or start
engine and carry out troubleshooting.
Between (37) – (47)
2 }) and continues operation.
POIL
Power supply
ENG
Power supply
40 Troubleshooting
Voltage
4.75 – 5.25 V
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
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Voltage
4.75 – 5.25 V
PC800, 850-8