Diagnostic software and Connector.

[algg]

Hi! Guys! Question: does anybody have a diagnostic soft for Nissans? And if yes how to get it. and last is the connectors are available? Thanks.

[KevinKernaghan]

Well, if you're driving a 90-95, Nissan implemented the GREATEST FEATURE EVER to stop you from wasting money on scan tools and mechanics with the exact same scan tools:

 

Diagnostics are under the passenger seat! Woohoo!

 

http://npora.ipbhost.com//index.php?showto...&hl=diagnostics

 

Unless, that is, you were looking for performance-related diagnostics, in which case, I have no idea what to tell you, there may be no way to hook up a reader.

Edited March 21, 2007 by KevinKernaghan

[88pathoffroad]

I don't think there's anything to plug into unless you get adapter plugs that go where the stock ECU wiring plugs into it.

[algg]

Thanks for the link very helpful. But there are two connectors above the fuse box behind the dash plastic from 93 up. And you can plug it in to the reader. It is just easier I think. But for now I will try to use the info from the link. Thanks again 88.

 

For some unknown reason one of the Path’s acting up. We actually did plug it to the reader at the shop and it showed up the speed sensor code (which I got out yesterday :furious: ) Put the other one in at for a wile it was driving fine w/out engine check light. Towards the end of the day the check engine light shows up again and it started to fill rough. So that is why I was asking about the soft and the connector cause the shop charges $50 for "computer diagnostic" :furious

[Animal]

It's called Nissan Consult, from what I have seen. Someone's got one on eBay. Don't know you can get anymore from it than the light.

 

Here's another.

Edited March 24, 2007 by Animal

[algg]

THanks!!!

[Jackofalltrades]

You mentioned a reader, something you plug the connectors under the dash into.  Do you have any information on this scanner, where I can find one?  I cannot find one anywhere.  (94 pathfinder)

[Slartibartfast]

You don't need a scanner to pull codes from one of these. There's a writeup here for pulling codes, or you can find a more in-depth version (including troubleshooting info) in the EF&EC section of the factory service manual, free download from Nicoclub. It's not particularly difficult, though it would be easier if the computer wasn't under the passenger's front seat.

 

If you really want a scanner, you may have some trouble tracking one down. There is a connector under the dash, but it's not OBDII, and it's not Nissan's own Consult system. Looks like Snap On made an adapter for their Modis system, if you happen to have one of those kicking around. AFAIK the original scan tool was just a box with a button and two blinky lights--basically the same interface that's on the back of the computer, except it's in your hand instead of under the seat. I don't think I've ever seen one, though, unless you count a bad scan of a grainy picture from a service manual for a 200SX.

 

This guy on Infamous Nissan is selling a homebrew version of the blinky lights box. Another thread on that site (which I can't find now for some reason) shows the wiring schematic for it. I built my own from that thread, and mounted the button and the lights through a blanking plate on the dash. Again, it gives the same info as the lights on the back of the computer--it's just easier to get to.

 

But yeah, if you just want to see why the money light is on, click that first link and go from there.

[peejay]

On 12/2/2024 at 2:00 AM, Slartibartfast said:

I built my own from that thread...

Wait, wait, wait, you can't just toss that in nonchalantly and expect us not to ask for a write-up!!!

[Slartibartfast]

There was one when I did it! That's the thread I can't find. I did however save a screenshot of the diagram. Credit to whoever worked it out, IIRC a few of the Infamous guys contributed to that thread (looks like Kurruppt posted this picture). If anyone with better google-fu than me finds the actual thread, let me know! I couldn't find crap.

 

 

I remember I put mine together and found that both LEDs were backwards, but I don't remember if that was my mistake or if the diagram had them backwards. Something to check with it hay-wired before it's all soldered up. And obviously be careful poking around in connectors that go straight to the computer--I don't know what would pop if something shorted at the check connector, but I doubt it would be easy to replace.

 

I didn't have a plug end for the check connector, so I got some small-ish male spade connectors, trimmed them down slightly to fit, and put a dab of hot glue on each to hold them in place. There is almost certainly a more elegant solution, but this has held up, it's reversible, and it did not require hacking the harness. If I did it again, I might consider gutting one of those Snap-On adapters, or just buying a connector and pins (if not the whole assembly) from KivPanther.

 

I mounted mine through the blanking plate for the hardbody under-dash e-brake. It's out of the way, it's removable, and I can see it from the driver's seat.

[hawairish]

On 12/2/2024 at 12:00 AM, Slartibartfast said:

Looks like Snap On made an adapter for their Modis system

Ha!  I found one of those at the junkyard earlier this year and thought about keeping it just because...but then realized I'd have zero use for it.

[level9]

I can confirm KivPanther's ashtray insert works. I went this route so I could easily see real-time diagnostics while driving.

There is another option for a plug-in box that's available on ebay (search Nissan ODB1 Diagnostic Checker - Error Code Reader for Nissan ECCS).