60
NISSAN
A/C
O
FF
ON
1985 - 1986 200SX Turbo
Warning:
Involves running engine.
Observe all safety precautions (see
page 2). Work in well ventilated area.
1) Mark the initial setting of
the Diagnostic Mode
Selector on the
computer housing.
IMPORTANT:
The
Diagnostic Mode
Selector is a potentiom-
eter. It is critical that the
initial position (setting)
of this potentiometer be marked on the
computer housing so that when testing is
complete, it can be reset to its original
position!
2) Using the Selector
Tool or other means,
turn the Diagnosis
Mode Selector to the
fully COUNTER-
CLOCKWISE position.
3) Turn the
ignition
switch ON,
but do not
start the
engine.
4) Check to see that
both the RED and
GREEN LED’s turn
ON and stay ON.
• If they do, proceed to the next step.
• If they do not, you have a problem
with the battery supply circuit which
feeds the computer (ECU), or the
ECU itself is defective. This failure
must be repaired before proceeding.
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.”
5) Turn the Diagnosis
Mode Selector fully
CLOCKWISE.
6) Have your pencil and paper ready.
7) Observe the RED and GREEN
LED’s.
• Codes 23, 31, and 32 should be
displayed.
• Note any codes other than 23, 31,
and 32.
8) Depress and
release
accelerator
pedal.
9) Observe the RED and GREEN
LED’s.
• Codes 31, and 32 should be
displayed.
• Note any codes other than 31, and
32.
10)Start the vehicle’s engine.
11)Observe the RED and GREEN
LED’s.
• Code 31 should be displayed.
• Note any codes other than 31.
12)Turn the A/C switch
from OFF to ON to
OFF (if equipped).
13)Observe the RED and GREEN
LED’s.
• Code 44 should be displayed.
• Note any codes other than 44.
Summary of Contents for Code Scanner CP9025
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