Log in

View Full Version : 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?