How to wire the OBD2 connector to an E38 ECM?
Thread Starter
TECH Apprentice
Joined: Aug 2010
Posts: 381
Likes: 0
From: Melbourne, FL.
How to wire the OBD2 connector to an E38 ECM? The Hi/Lo twisted pair runs to the TCM and the ones from the TCM I assume would go to the OBD2 connector.
Can anybody tell me what needs to go where on the OBD2 connector pins?
I know about the 2 grounds and 12V+ pins but where should the twisted pair go on the connector?
Thanks, Ken
Can anybody tell me what needs to go where on the OBD2 connector pins?
I know about the 2 grounds and 12V+ pins but where should the twisted pair go on the connector?
Thanks, Ken
How about the same info for a 2007 E38. The one I have is different for sure, I have tried the diagram posted already and it isn't correct for my style. For example my pin 13 on J1 goes to the A/C low pressure signal.
I also tried wiring the OBD to the V2 pin out. My scanner doesn't even turn on that way.
I also tried wiring the OBD to the V2 pin out. My scanner doesn't even turn on that way.
OBD
Pins 1,2,&3: Not Used
Pin 4: (BLACK) Ground, Circuit 1050
Pin 5: (BLACK/WHITE) Ground, Circuit 1851
Pin 6: (TAN/BLACK) GM High Speed LAN Serial Data Bus +, Circuit 2500, ECM X1 Pin 28
Pins 7 thru 13: Not Used
Pin 14: (TAN) GM High Speed LAN Serial Data Bus -, Circuit 2501, ECM X1 pin 27
Pin 15: Not Used
Pin 16: (RED/WHITE) Battery Positive Voltage, Circuit 640
That is from this thread, but I added the ECM pins for the GM LAN.
https://ls1tech.com/forums/generatio...bdii-port.html
Last edited by -TheBandit-; Jan 18, 2013 at 12:57 PM.
Teching In
Joined: Sep 2005
Posts: 9
Likes: 0
From: Grand Haven,Mi.
Yes that does work however I am also working with the stock 07 Cluster. I need to know where to put the low speed serial wire. Dark green pin 6 on the cluster plug. The information I have is incomplete and just tells me it goes to circuit 5060 and says "data communication schematics"
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo Teching In
Joined: Sep 2005
Posts: 9
Likes: 0
From: Grand Haven,Mi.
Thanks for the info.
I can wire it to pin 1 on the obd port. This still isn't telling me where to go to get it connected to the ecm. It is starting to look like I may need the BCM just to run the cluster.
I can wire it to pin 1 on the obd port. This still isn't telling me where to go to get it connected to the ecm. It is starting to look like I may need the BCM just to run the cluster.
Teching In
Joined: Sep 2012
Posts: 14
Likes: 0
From: Cave City Ky
wiring diagrams can anyone tell me how to hook this up for 1995 s10------
1.---red ignition power
2.---green with white stripe vss out
3.---white tach
4.---orange battery postive
5.---pink ignition no # 2
6.---brown with double white stripes ses light
7.---yellow double black stripes vss out
8.---green ac reguest
9.---beige with white stripes oil pressure
10.---med green park neutral
11.---dark purple starter
12.---light green reverse light
13.---big yellow fuel pump
1.---red ignition power
2.---green with white stripe vss out
3.---white tach
4.---orange battery postive
5.---pink ignition no # 2
6.---brown with double white stripes ses light
7.---yellow double black stripes vss out
8.---green ac reguest
9.---beige with white stripes oil pressure
10.---med green park neutral
11.---dark purple starter
12.---light green reverse light
13.---big yellow fuel pump
