45
NISSAN
4) Access the Computer for Testing
• Trouble
codes are
“read” by
observing
the flash
patterns of 1 or 2
LED’s (Light Emitting Diodes)
mounted inside the computer. These
LED’s can be seen through a “sight
window” - an opening in the top or
side of the computer housing.
• Also mounted in the computer is the
test switch or potentiometer which
must be operated to start the code
reading process.
• Remove any vehicle parts such as
kick panels or other plastic pieces
which would restrict access to the
LED sight window, the test switch or
potentiometer.
• The computer itself may have to be
removed from its mounting location.
–Make note of wire harness position
before moving computer. Harness
should be replaced in original
position when computer is re-
mounted.
–Do not disconnect any of the
wiring harness connectors which
plug into the computer. You may
lose stored trouble codes!
5) Have the Selector Tool on hand
This is for starting the code reading
process.
6) Have a Pencil and Paper Ready
This is for writing down all the codes.
This completes the vehicle prepara-
tion.
Proceed to “Reading Trouble Codes,”
page 46.
Summary of Contents for Code Scanner CP9025
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