Folks,

I'm looking at my son-in-law's 1995 Altima in hopes of tracking down his
check engine light code.

My research on the Web has turned up conflicting information.

It looks to me like the ECU is on the floor at the front of the center
console. My understanding is that one turns a diagnostic knob clockwise for
two seconds and then returns the knob all the way counter-clockwise while
the key is ON (not running). If that is correct where is that knob? Side
of the ECU? Somewhere else? Does it take a screwdriver to turn it? Where
is the indicating LED on the computer that flashes to reveal the stored
code.

Thanks for any help you can give me.

Yes. You've found it. No knob but there is a screw driver slot under
a piece of transparent tape. You should find the slot in the
10:30\4:30 position stop and the next stop should be at the 1:30/7:30
position. Be careful the stops can break if excessive torque is
applied afterwhich the screw will turn no end.

OK. Thanks for the reassurance. My eyesight was letting me down while
trying to look at this thing from an awkward angle.

Now is there an LED on the computer itself to watch? The reason for asking
is that the check engine bulb recently burned out. Replacing it will be
another task.

"Bill" <wtjohnston (AT) gmail (DOT) com> wrote

An error code(s), or a 5 long 5 short no stored code, will be signaled
via the check engine lamp after the screwdriver slot is moved from the
first position to the second position then back to the first position.
Multiple error codes will be given in sequence. You must replace a
burned out check engine lamp in order to see the codes unless you can
figure a way to access the circuit path and intercept with a meter.

OK. That's what I was afraid of. Is it very difficult to access the check
engine bulb?

"Bill" <wtjohnston (AT) gmail (DOT) com> wrote