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Hooked up my check engine light today but not getting any flashing
codes. When are you supposed to get them? Do the green "read
memory" plugs have to be connected to make the codes flash?

Get steady light when the black "test mode" plugs are connected.

Warren C.

Hi Warren,
I posted some information several weeks ago on subaru fuel injection system. It has what you need to diagnose / trouble shoot
2.2L problems. It is still out there on the net I just checked. Enjoy.



Darrell

ps. The test connectors are explained on page 21

Warren, It took several days and miles before my check engine light
would stay on and then it was on permanently. This process may repeat
itself each time you clear the codes with the black connectors. I've
never reconnected my check light and will not until I set up the Myers
three code fix. I eventually want the check light to actually perform
its intended function.

Have you checked your codes by connecting the green plugs and running
the engine as specified? If so what codes do you get? Should be 33, 51,
52.

Warren Chapman wrote:

Ed,

I'm not getting ANY codes so far. That was my question. Do I
connect the green plugs in order to get them?? I have tried
connecting them, but still......nothing. I haven't driven around
much yet but have idled the engine and reved it up to 2000-3000 rpm
and held it there for a while. Still no flashing codes.

I know the light is working because it comes on when the black plugs
are connected. Is that what its supposed to do?/


Warren C.

The green plugs are called Test Mode Connector and are used for the "D
Check" which gives trouble codes through the check engine light. When
used in conjunction with the black plugs will clear all codes from
memory.

The black plugs are called Read Memory Connector and are used to check
past trouble codes, blink the vehicle specification code (type of
vehicle) and possibly other functions we don't make use of. They will
also clear codes in the computer when used with the green plugs. The
code clearing procedure will clear all memory functions which the
computer will have to relearn as you drive for a while. I believe the
computer memorizes all its functions and constantly averages how it
responds to input from all the sensors based on past actions. In other
words it works just like our brain does.

With the black plugs only connected you may get a blinking light with
the ignition on but engine off. This is either a trouble code from
memory or the Subaru veh identification code if there are no codes in
memory.

The test procedures for both sets of plugs is listed in the fuel
injection manual which should be on the web link that has been posted
twice by Darrell.

Basically to test for trouble codes you connect the green plugs, turn
the key on, depress the acc pedal all the way and immediately back off
to half throttle for two seconds then let up.

Then start the engine. This may cause the check engine light to emit
trouble codes. (Didn't on mine)

If not, drive down the street for one minute and shift through all
gears. This should cause the check engine light to emit trouble codes.
(I got codes half way through this process). Then it says to "warm up"
the engine above 2000 rpm. The book notes that over 2k for more than 40
seconds will produce a trouble code but it doesn't say which one or
whether you are supposed to stop or continue beyond 40 seconds.

If light blinks in a non trouble code sequence you are done with the
test but should be scratching your head because you should have at least
the codes for the each of the "big three" items you have not done a
Myers patch for.

If light is not blinking at this point you should go back through the
2000 rpm warm up again.

I got the big three codes both in my test and from a dealer who used the
Select Monitor plug. The Select Monitor is a hand held device that can
check all the codes, including those the D Check doesn't pick up. It
can also clear the memory.

P.S. When you connect the green plugs to get error codes you must have
the black plugs disconnected otherwise you may clear all memory and your
engine will have to relearn its functions again. No bid deal but you
have to wait a bit while things get back to normal.

I think others have mentioned having plugs connected while driving
also. The plugs should only be connected if you want to use them.
Check the manual for correct operation.

Ed McKinley wrote: