52
NISSAN
1984 - 85 200SX, 1985 Stanza
Warning:
Involves running engine.
Observe all safety precautions (see
page 2). Work in well ventilated area.
1) Using the Selector
Tool or other
means, verify that
the Diagnosis Mode
Selector is in the
OFF position.
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 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
may be defective. This failure must
be repaired before proceeding. Refer
to the vehicle service manual. Some
publications have this information in
books or sections called “Computer-
ized Engine Controls”, “Electronic
Engine Controls”, or “Tune-Up
Information.”
4) Turn the Diagnosis
Mode Selector to
the ON position.
5) Have your pencil and paper ready.
6) Observe the RED and GREEN
LED’s.
• Codes 23, 24, and 31 should be
displayed.
• Note any codes other than 23, 24,
and 31.
O
FF
ON
7) Depress and
release accelera-
tor pedal.
8) Observe the
RED and GREEN
LED’s.
• Codes 24, and 31 should be
displayed.
• Note any codes other than 24, and
31.
9) Move the
gear shift
lever from
Neutral to the highest gear and
then back to Neutral.
10)Observe the RED and GREEN
LED’s.
• Code 31 should be displayed.
• Note any codes other than 31.
11)Start the vehicle’s engine.
12)Observe the RED and GREEN
LED’s.
• Code 31 should be displayed.
• Note any codes other than 31.
13)Turn the A/C switch
from OFF to ON to
OFF (if equipped).
14)Observe the RED
and GREEN LED’s.
• Code 44 should be displayed.
• Note any codes other than 44.
15)When all diagnostic
procedures are
complete, turn the
Diagnosis Mode
Selector to the OFF
position, and the ignition switch to
the OFF position.
P
R N D 2 1
A/C
Summary of Contents for Code Scanner CP9025
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