43
NISSAN
Vehicle Preparation
Complete ALL steps in this section
before proceeding to Reading
Trouble Codes, page 46
IMPORTANT: Reading trouble codes on
Nissan vehicles requires access to the
engine computer. Due to varying
mounting locations and methods,
some mechanical disassembly may
be required! Refer to the Computer
Location table in step 3 (see page 44). If
you are unfamiliar or uncomfortable with
the disassembly required, you may want
to get help from another person before
proceeding.
1) Safety First!
• Set the parking brake.
• Put the shift lever in PARK or Neutral.
• Block the drive wheels.
• Make sure all accessories are turned
OFF.
• Make sure the
ignition key is
in the OFF
position.
2) Test the
“CHECK”
Engine Light
(Also called
“CHECK
ENGINE”, or
labeled with a small engine picture.)
NOTE: If vehicle does NOT have a
“CHECK” engine light, go directly to
step 3.
• Turn the ignition key from the OFF to
the ON position, but do not start the
engine!
• Verify that the light turns ON.
• If the light does not turn on, you have
a problem with this circuit which must
be repaired. Refer to the vehicle
service manual. Some publications
have this information in books or
sections called “Computerized Engine
Controls”, “Electronic Engine Controls”
or “Tune-Up Information.”
• Turn the ignition key OFF.
O
FF
ON
CHECK
Summary of Contents for Code Scanner CP9025
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