Information In Troubleshooting Table - Komatsu Galeo PC800-8 Shop Manual

SEN00789-02

Information in troubleshooting table

a The following information is summarized in the troubleshooting table and the related electrical circuit dia-
gram. Before carrying out troubleshooting, understand that information fully.
Action code Failure code
Display on Display on
machine machine
monitor monitor
Contents of
Contents of trouble detected by machine monitor or controller
trouble
Action of
Action taken by machine monitor or controller to protect system or devices when engine control-
machine monitor
ler detects trouble
or controller
Problem that
Problem that appears on machine as result of action taken by machine monitor or controller
appears on
(shown above)
machine
Related
Information related to detected trouble or troubleshooting
information
1
2
Possible causes
Possible causes of trouble
and standard
(Given numbers are refer-
value in normal
3
ence numbers, which do
state
not indicate priority)
4
5
6
Trouble Title of failure phenomenon shown in failure history
Cause Standard value in normal state/Remarks on troubleshooting
<Contents of description>
• Standard value in normal state to judge possible causes
• Remarks on judgment
<Troubles in wiring harness>
• Disconnection
Connector is connected imperfectly or wiring harness is broken.
• Ground fault
Wiring harness which is not connected to chassis ground circuit is in
contact with chassis ground circuit.
• Hot short
Wiring harness which is not connected to power source (24 V) circuit
is in contact with power source (24 V) circuit.
<Precautions for troubleshooting>
(1) Method of indicating connector No. and handling of T-adapter
Insert or connect T-adapter as explained below for troubleshooting,
unless otherwise specified.
• If connector No. has no marks of "male" and "female", disconnect
connector and insert T-adapters in both male side and female side.
• If connector No. has marks of "male" and "female", disconnect con-
nector and connect T-adapter to only male side or female side.
(2) Entry order of pin Nos. and handling of tester leads
Connect positive (+) lead and negative (–) lead of tester as explained
below for troubleshooting, unless otherwise specified.
• Connect positive (+) lead to pin No. or wiring harness entered on front
side.
• Connect negative (–) lead to pin No. or harness entered on rear side.
40 Troubleshooting
PC800, 850-8