How to wire the OBD2 connector to an E38 ECM?
01-12-2013, 10:44 AM
#1
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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
01-18-2013, 12:46 PM
#5
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-; 01-18-2013 at 12:57 PM.
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Stepside66 (10-29-2020)
02-04-2013, 07:02 PM
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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"
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02-04-2013, 08:04 PM
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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.
02-05-2013, 05:58 PM
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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
