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1) Use Selector tool or other means to
turn the Diagnosis Mode Selector
to the ON position.
DIAGNOSTIC IND.
OFF
WITHIN THIS EXTENT
ON
2) Turn the ignition
switch ON, but DO
NOT START THE
ENGINE.
3) Check to see that
both the RED and
GREEN LED's turn
ON and flash at
the same time:
• If they do, proceed to the next step.
• If they do not, the computer (ECU)
may be defective. Refer to vehicle
service
manual.
4) Depress and
release
accelerator
pedal.
5) Turn the A/C switch
from OFF to ON to
OFF (if equipped).
6) Have your pencil and paper ready.
7) Observe the RED and GREEN
LED's.
• Code 32 is normal at this point and
may be ignored.
• Codes other than 32 indicate a
problem which should be repaired
before proceeding.
50
CAUTION
PLEASE OPERATE
A/C
8) When the results from Step 7 are
satisfactory, start the engine and
observe the RED and GREEN
LED's.
• Vehicles with air conditioning: Code
44 indicates that the computer
system is O.K. and that testing is
complete. Codes other than 44
indicate a problem which should be
repaired.
• Vehicles without air conditioning:
Code 31 indicates that the computer
system is O.K. and that testing is
complete. Codes other than 31
indicate a problem which should be
repaired.
9) When all diagnostic procedures are
complete, turn the ignition switch
to the OFF
position, and the
Diagnosis Mode
Selector to the
OFF position.
Look up the code definitions listed in
Section 12, "Nissan Code Meanings,"
At this point you can either:
• Have your vehicle professionally
serviced. Trouble codes indicate
problems found by the computer.
or,
• Repair the vehicle yourself using
trouble codes to help pinpoint the
problem. Refer to Section 3, "Using
Codes." Be sure to erase any trouble
codes from the computer's memory
after repairs are completed, as
indicated on the following page.
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