Komatsu SAA6D140E-3 - Method of Using Troubleshooting Flowchart

12-204
140-3 SERIES
TROUBLESHOOTING METHOD OF USING TROUBLESHOOTING FLOWCHART
METHOD OF USING TROUBLESHOOTING FLOWCHART
Troubleshooting code number and problem
The title at the top of the troubleshooting chart gives the troubleshooting code number and the problem with
the machine.
General precautions
When carrying out troubleshooting for the problem, precautions that apply to all items are given at the top of
the page under the title and marked with ★.
The common precautions marked ★ at the top of the page are not given in the (box formed by a broken
line) on the left, but must always be followed when carrying out the check given in the on the right.
Distinguishing conditions
Even with the same problem, the method of troubleshooting may differ according to the model, component,
or problem. In such cases, the failure mode is further divided into sections marked with small letters (for
example, a), b)), so go to the appropriate section to carry out troubleshooting.
If the troubleshooting table is not divided into sections, start troubleshooting from the first check item in the
flowchart.
Method of following troubleshooting chart
NOTE:
The number written at the top right corner of the is an index number; it does not indicate the
order to follow.)
• To the left of the there is (box formed by a broken line). This contains the procedure and
conditions needed for inspection and measurement of the item in the . Before starting inspection
or measurement, always read the instructions for the procedure carefully, and make sure that you
understand them.
• Check or measure the item inside , and judge if the result is YES or NO. If the judgement values
in the are correct or the answer to the question inside the is YES, follow the YES line; if
the judgement value is not correct, or the answer to the question is NO, follow the NO line. Con-
tinue the troubleshooting for the next item in the same way.
Following the YES or NO lines according to the results of the inspection or measurement will lead
finally to the Cause and Remedy block. Check the cause and take the action given as the remedy.
Troubleshooting tools
Details of the tools needed for troubleshooting are given separately in the table of TOOLS FOR TESTING,
ADJUSTING, AND TROUBLESHOOTING.
<Example of troubleshooting>
E-20 Error code [E-70] [Excess current in fuel supply pump PCV1 system]
★
★★
★
Before carrying out troubleshooting, check that all the related connectors are properly inserted.
★
★★
★
Always connect any disconnected connectors before going on the next step.
Table 1 Table 2
PV1 (male) Resistance value CN7 (male) Resistance value
Between (1) and (2) 2.3 – 5.3
Ω
Between (10) and (11) 2.3 – 5.3
Ω
Between (1)(2) and ground Min. 1 M
Ω
Between (10)(11) and ground Min. 1 M
Ω