Data Link pin schematic, '97 OBS - Ford Powerstroke Diesel Forum
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 11-01-2012, 02:29 PM
Powerstroke.org Rookie
 

Join Date: Dec 2011
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Question Data Link pin schematic, '97 OBS

I've got a '97 OBS with the 7.3 powerstroke, 2wd., Automatic

Multiple shops have tried to hook up to the OBD style connector under the dash and with no success. It's as if the computer doesn't exist.

The truck runs fine except for the occasional blinking O.D. light, which is why I'm trying to hook up and pull a code.

Yes the fuse is good and I have battery voltage to pin #16.

I have searched and searched and I have found numerous pictures and diagrams, but nothing that is like what I have in my truck.

My data link connector uses pins number 2, 4, 5, 10, 13 and 16.

That's only 6 pins. Every diagram and picture I've found uses 7 pins. I have had zero success in finding the exact configuration of the pin count and location that I have in this truck.

There are only 6 wires in the harness going to the plug and everything looks unaltered.

Can anyone out there tell me where these pins/wires go, especially to the PCM so that I can verify that it's not a wiring problem before I condemn the PCM.

Thanks for your time.

Tom
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 11-02-2012, 08:36 AM
Hee Hee, he's doing it...
 

Join Date: Oct 2011
Location: Pasadena, CA
Posts: 5,490
Thanks: 44
Thanked 85 Times in 80 Posts
Feedback Score: 0 reviews
Dumb question, the key is in run when you try to connect to the PCM correct? It won't work with the key off. I don't have my wiring diagram on me till late tonight so hopefully someone else will chime in sooner. I went to a shop once to get my wife's truck smogged and they couldn't get the scanner to connect to the PCM and told us the PCM was bad. The idiots didn't know that trucks do not conform to '97 ODB II requirements (they didn't have to conform till like 2000) and all they had to do was turn the key to RUN. I showed them how to use their equipment and drove away not to let them near the truck again.

Another question, does your speedo bounce a little as you drive. Can happen at specific speeds like between 40-50.

Last edited by BigFuel; 11-02-2012 at 08:39 AM.
Reply With Quote Quick reply to this message
  #3  
Old 11-02-2012, 11:20 PM
Powerstroke.org Rookie
 

Join Date: Dec 2011
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Yep,

Key On, key off. Nada, zero, zip.

Everything from borrowing my neighbor's scanner & Autozone to a couple of very reputable shops. Same results.

My plan is to meter some of the basic stuff, mainly the wiring before I decide to let someone else have a shot at it or stab a new PCM in it. I do have a line on a new, in the box PCM for fairly reasonable money.
Reply With Quote Quick reply to this message
  #4  
Old 11-03-2012, 04:37 AM
Compression Ignition Addict
 

Join Date: Nov 2011
Location: dodge center mn
Posts: 1,416
Thanks: 1
Thanked 5 Times in 5 Posts
Feedback Score: 0 reviews
not all scanners can read an obs diesel pcm
Reply With Quote Quick reply to this message
  #5  
Old 11-03-2012, 08:45 AM
Powerstroke.org Rookie
 

Join Date: Dec 2011
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Yep, I'm aware of that. The trans and the diesel shops that I used were using scanners that looked like they belonged in an intensive care unit. They had all of the "Ford specific" variations of the "not quite OBD2" stuff.

I can understand that my neighbors Snap On scanner or the guys at Autozone couldn't pull it up but not these guys.
Reply With Quote Quick reply to this message
  #6  
Old 11-05-2012, 12:34 PM
Compression Ignition Addict
 

Join Date: Oct 2011
Location: Tehachapi, CA
Posts: 1,665
Thanks: 0
Thanked 29 Times in 29 Posts
Feedback Score: 0 reviews
Straight out of the 97 EVTM for C227, Data Link Connector:

Pin 2: Circuit 914 (T/O), Data (+) from PCM pin 16, through C202 (firewall feedthrough connector)
Pin 4: Circuit 57 (BK), Ground
Pin 5: Circuit 570 (BK/W), Ground through C202
Pin 10: Circuit 915 (PK/LB), Data (-) from PCM pin 15, through C202
Pin 13: Circuit 107 (P), PCM Input from PCM pin 13, through C202
Pin 16: Circuit 40 (LB/W), Hot at All Times from Underdash fuse 16 (15A)
All other pins are NOT USED

Cheers!
Reply With Quote Quick reply to this message
  #7  
Old 11-05-2012, 02:51 PM
Powerstroke.org Rookie
 

Join Date: Dec 2011
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
NOW THAT'S WHAT I'M TALKING ABOUT!!!

Thanks soooo much. That is exactly what I'm looking for. I'll just bet (I'm hoping) that it's at the firewall connector. I never thought to look there.

Thanks again for your time.

I'll let you know what I find.

Tom
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 01:21 PM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors