OBD1 to OBD2

Frobisher

Active member
Dec 27, 2012
34
1
Pennsylvania
Is there any chance that $40 cable and phone link would work for an emissions inspection? I still need to do the tailpipe check in PA on my 95 D1, but it's getting both expensive and hard to find garages that can still do it. Thanks!
 

p m

Administrator
Callsign: AK6PM
Apr 19, 2004
14,137
8
53
La Jolla, CA
www.3rj.org
Is there any chance that $40 cable and phone link would work for an emissions inspection? I still need to do the tailpipe check in PA on my 95 D1, but it's getting both expensive and hard to find garages that can still do it. Thanks!
If you're asking whether you can offer an inspector a cable and datalink in lieu of tailpipe check, I seriously doubt it. In California, MY 2000 and later vehicles are not subjected to tailpipe test, but... every test station has a tailpipe tester, and the cost is the same even if the amount of work is different.
If you're asking whether you can use it to troubleshoot/diagnose your 14CUX prior to tailpipe inspection, the answer is yes - but you have to read up a bit on the system and what data to look for.
 

Frobisher

Active member
Dec 27, 2012
34
1
Pennsylvania
That makes sense. I thought it might be a long shot, but you never know. PA isn't quite as stringent as CA, but we sure can make it a pain here just the same. Thanks for the details.
 

champana

Well-known member
Jan 9, 2006
811
1
Hippie Hollow, AL
It’s a truck I’ve restored for my wife. Having it tied to her phone wouldn’t do me any good. Just want to be able to set audible alarms for coolant temp, etc so she pulls over before it’s too late.

We who drive these things regularly watch temp more than the speedo! Hahaha
 

p m

Administrator
Callsign: AK6PM
Apr 19, 2004
14,137
8
53
La Jolla, CA
www.3rj.org
It is far easier to set up an independent temp sensor wired to an audible or visible alarm.
Another avenue is to "linearize" the temperature sensor in the instrument panel - I don't remember where I have seen it, but it has been described quite well. The point of this is self-explanatory - instead of making the needle stay in the idiot zone between 160 and 220F, have it actually move in this range so you know if you are inching upwards.
 

robertf

Well-known member
Jan 22, 2006
3,913
4
-
I started to throw this together a long time ago. Didnt make it too far off the breadboard but it mostly worked so your idea is possible, and has been done.

talked 14cux on one side, ISO OBD2 on the other. Got modes 00 and 01 with plans for 03 and 04 by mapping the 14cux code to P10XX. Got busy with other stuff, lost interest.
 

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champana

Well-known member
Jan 9, 2006
811
1
Hippie Hollow, AL
I started to throw this together a long time ago. Didnt make it too far off the breadboard but it mostly worked so your idea is possible, and has been done.

talked 14cux on one side, ISO OBD2 on the other. Got modes 00 and 01 with plans for 03 and 04 by mapping the 14cux code to P10XX. Got busy with other stuff, lost interest.
Super cool.
 

robertf

Well-known member
Jan 22, 2006
3,913
4
-
does rovergauge work with a phone? The main reason I started this project is because I don't want to lug a laptop around with me on vacation.

I would be open to making an arduino shield available on oshpark with a mouser BOM, a plastic housing with the 14cux and obd2 connectors available on shapeways, and uploading the half working code to github if there are people interested and capable of furthering the coding side of the project or even willing to proof the circuit and see if theres a better way other than transistors and resistors for the 5v to 12v serial comm

I had grand delusions of rewriting parts of colins rovergauge to strip some of the elm headers and footers off to make it compatible as a hardware interface too, but if car scanner on my iphone talks to it I doubt I'd ever need rovergauge proper again.
 

mearstrae

Well-known member
Mar 15, 2017
80
0
Pennsylvania
Years ago, when my wife had a '95 Lwb, I installed an over temp alarm from Ebay. It mounted on the dash and had a cable with a lug end that mounted under a bolt head on the thermostat housing and had only two other wires, one to power and one to ground. it was adjustable to desired temp alarm setting in either C or F scales. It also showed system voltage. These should still be available, in some form, as they are popular in Australia. That should help solve one problem, I installed it after 'my' wife overheated her engine.
 

p m

Administrator
Callsign: AK6PM
Apr 19, 2004
14,137
8
53
La Jolla, CA
www.3rj.org
does rovergauge work with a phone? The main reason I started this project is because I don't want to lug a laptop around with me on vacation.
yes, it works fine on an Android phone.
The graphics isn't bad at all, it is more pleasant to look at than Ultragauge or even factory instrument panel.
But after I found that the engine practically never goes over 185F, I lost interest in watching it.
 

Tugela

Well-known member
May 21, 2007
3,942
12
Seattle
I like how that design retains the excellent forward visibility (particularly for tall drivers) for which the D1 is famous.
 
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