Diagnostic connector

JESTER_NS

MEMBER
MAZDA 626

I just picked up a 1995 Mazda 626 Cronos, 4 door, 4 cylinder, 2 litre engine, automatic. Great little car. It has a little problem starting in the mornings it stalls, sometimes 2 or 3 times. It will also stall sometimes at intersections. Doesn't matter if it's cold or up to temp. Not really all that concerned about this because I'm sure it's something like the MAF or Temp sensor, but what has me puzzled is this. We went to connect to a diagnostic and it wouldn't. The diagnostic, while a little older is a good one, but would not connect. No problem, just get the Hanes manual out and jump the two pins, count the times the light flashes and read the code, right? Wrong. Went to jump the pins and noticed the # 10 pin is missing. Supposed to jump to ground to activate, but it's not there. I took a quick look, it's not like its broken or shoved down in, it is simply missing. There doesn't seem to be a wire for it either. It looks all original, though I wouldn't know for sure. What does this mean.

2 Replies

JESTER_NS

MEMBER
3 POSTS

Since lots have viewed, but no one answered, I thought I would supply a little more info that I have picked up in the last week or so.
On this car, 1996, 626 Cronos, Automatic 2.0L engine. I add all this just because I don't know if different models are the same or not. The diagnostic connector is not the diagnostic connector. While looking at the connector that is mounted on the drivers side inner fender, just scan a little to the left towards the battery. (Front of the car). Laying down there you will find another connector, you may recognize it as the same as or at least similar to the old Ford OBDI (not OBDII) connector. It is almost. The only problem I found is, there is no ground wire in the cable, so if your diagnostic unit needs the ground supplied through the cable you are out of luck unless you know what pin of your unit that the ground connects to. I don't suggest you just play around because you could damage your expensive device. I could not determine mine, so I left it alone.