No code on check engine light

Tiny
DANIEL ERNST JONSEN
  • MEMBER
  • 2000 MAZDA 323
  • 1.5L
  • 4 CYL
  • 2WD
  • MANUAL
  • 96,300 MILES
Hi,

First and foremost the car;
European model 323 BJ (sedan) glx 1.5i ((ZL-DE) think Protegé lx in body and model equipment), but with a mid 90's obd1 system like the American 626's of the time, and equivalent error codes.

Now, the issue at hand:

Cold start, my CEL (check engine light) comes on when i start the engine, and disappears by itself after less than a minute.
With your guide on how to get Mazda OBDI codes, i have NOT succeeded, as the check engine light only appears with the engine running, not just with the key turned to ignition.

Not sure if it was a coincidence, but i had a very rough idle with the engine running, and OBDI pins "TEN" and "GND" connected (less than 100 rpm's on the needle, but didn't choke - engine does in the area of 600 rpm's in idle when warm, 1,500 rpm's cold.

I can provoke the check engine light to appear, by turning my steering wheel to either side - getting a little resistance is usually enough to make it appear, and removing said resistance makes the check engine light disappear again.
No success on getting a code that way either, i tried.

https://youtu.be/CmESR8lMvBk to give you a better idea of it.

Check engine light appears and disappears at a standstill when provoked, as well as slow driving around corners, and roundabouts when rpm is in the lower range (though not always, and not always a constant either).
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Tuesday, February 11th, 2020 AT 1:56 AM

5 Replies

Tiny
SCGRANTURISMO
  • EXPERT
Hello,

Are you sure it's an OBD 1 system? In the United States law for all vehicle's to be OBD 2 compliant was 1996. If it is an OBD2 system it would have a 16 pin Data Link Connector[DLC]. I have included a diagram of what it would look like with a pin out chart in the diagrams down below.

Thanks,
Alex
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Tuesday, February 11th, 2020 AT 3:09 PM
Tiny
DANIEL ERNST JONSEN
  • MEMBER
Hello Alex

Yes, until end of production the European 323's didn't change to OBDII.
Not sure if it's due to import or not.
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Tuesday, February 11th, 2020 AT 4:39 PM
Tiny
SCGRANTURISMO
  • EXPERT
Hello,

So it looks like you are going to have to get a OBD 1 code reader. I tried to find the instructions for pulling codes from a 1995 Mazda Protege with a 1.5L engine, and this is what I got in the diagrams down below.

Thanks,
Alex
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Tuesday, February 11th, 2020 AT 11:25 PM
Tiny
DANIEL ERNST JONSEN
  • MEMBER
Hello Alex,

It would seem to be the case - do you think an OBDI to OBDII adapter (i own one for some reason) will be sufficient for a live data pull?
Got a certified Mazda mechanic in my area, but he's charging the equivalent of $90.00 for diagnostics, without guarantees he can even pull the error code out.
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Wednesday, February 12th, 2020 AT 5:12 AM
Tiny
SCGRANTURISMO
  • EXPERT
Hello again,

Sure, why not. As long as you have the correct adapter. In the diagrams down below I have included the list of P and U codes that the OBD 1 system will store in the Powertrain Control Module[PCM] if there is a problem. Please report back with how everything turns out and I hope that this helps.

Thanks,
Alex
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Wednesday, February 12th, 2020 AT 5:40 AM

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