Actron Code Scanner CP9025, Руководство пользователя

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66
NISSAN
1987 All models except Pathfinder, Pickup, Van
1988 All models except Pathfinder, Pickup, Van
1989 All models except Pathfinder, Pickup
1990 All models (including Axxess) except Stanza,
Van, 300SX
1991 Maxima, Pathfinder, Pickup
1992 Maxima with VG30E engine, Pathfinder, Pickup
O
FF
ON
Preliminary Checks
Nissan service manuals list several
checks which should be made before
reading trouble codes. Problems in the
areas listed below can cause the
computer to set false or misleading
codes. Ignoring these checks can make
you miss the real cause of a code! This
can lead to the unnecessary replace-
ment of good parts. Service manual
procedures for troubleshooting a code
assume all preliminary checks are good.
These checks vary with vehicle. Typical
checks are listed below. Refer to service
manual for your vehicle requirements.
• Visually inspect electrical wiring and
connectors.
• Visually inspect vacuum hoses and
connectors.
• Perform a compression test.
• Perform an exhaust system
backpressure test.
• Perform a fuel pressure test.
• Check curb idle speed.
• Check ignition timing.
• Check computer control of air/fuel
mixture.
• Check the idle speed switch.
• Perform a Mode 5 check, while test
driving the vehicle.
Reading Trouble Codes:
All listed vehicles
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) Turn the ignition
switch ON, but
do not start the
engine.
3) Turn the Diagnosis
Mode Selector fully
CLOCKWISE.
4) Observe the RED
and GREEN LED’s.
5) Both LED’s will flash sequentially 1
through 5 (1 flash = Mode 1, 2
flashes = Mode 2, etc.).
6) When Mode 3 (Trouble
Codes) has been
reached, as indicated
by 3 flashes, immedi-
ately turn the
Diagnosis Mode Selector fully
COUNTERCLOCKWISE.