Anyone know the pinouts on the OBD connector?

supreme_style21 · 08-26-2011, 04:32 AM

Anyone have a wiring diagram or list of the pinouts on the OBD connector? Specifically an 04, if they make a difference.

SIUlero · 08-26-2011, 11:20 AM

A quick google search reveals this:

http://en.wikipedia.org/wiki/On-board_diagnostics

supreme_style21 · 08-27-2011, 12:29 AM

I've read through that one already. Nothing specific to a GM car?
Or deciphered? I'm not really versed in the things, so K line, L line, etc stuff is over my head.

SIUlero · 08-27-2011, 01:22 AM

What specific information are you looking for? I'll try to look it up on AllData at work tomorrow.

a.graham52 · 08-27-2011, 03:36 PM

________________________
\ 1| 2 | 3| 4 | 5| 6 | 7 | 8 /
\9|10|11|12|13|14|15|16/

2: serial data signal (class B) (purple)
4: ground (black)
5: engine control module ground (black/white)
9: serial data signal UART (tan)
16: B+ (orange)

supreme_style21 · 08-28-2011, 07:54 PM

I guess I really want to know what spot feeds the class 2 data. If its possible. Been looking at throwing in a DIC from an Impala or Monte Carlo. I've got the wiring for the DIC, now just trying to figure out where to plug into the Olds. I didn't want to splice into things since I really ain't familiar with it all. I did this in an earlier Grand Prix so it was easy to just plug into the OBD plug to test things out.

Thank you a.graham for that, def helps.

a.graham52 · 08-28-2011, 09:00 PM

no problem

a.graham52 · 08-31-2011, 09:06 AM

did i get a negative rep from this post? noticed i had a blue one instead of a green

supreme_style21 · 09-03-2011, 02:07 AM

no? I didn't give you any neg rep

a.graham52 · 09-03-2011, 10:20 PM

haha someone did. i dont mind getting negative. just wanted to know why

supreme_style21 · 09-04-2011, 08:33 PM

Fuel data is communicated over the serial data line, right? I get speed info on the DIC and it communicates back to the car (beeps thru the speaker) but no fuel data.
This is the wiring for the DIC, so it's pretty straight forward to hook up, so I guess it isn't going to work if I don't get any fuel data.
DIC Pin DIC Color Circuit #
7 Brown 143 Ignition 3
8 Blk/White 1251 Ground
10 Lt Grn/Blk 735 Ambient Temp Sensor
14 Orange 2440 Battery
15 Yellow 1127 Class 2 Serial Data

a.graham52 · 09-04-2011, 09:08 PM

fuel level is sent to the pcm and im assuming from there its class II to the ipc?