Which cables from PCM to OBD-II
Thread Starter
Staging Lane
Joined: Mar 2008
Posts: 57
Likes: 0
From: Stockholm, Sweden
Which cables from PCM to OBD-II I try to figure out how I connect the OBD-II connector to the PCM (LQ9). As I understand pin 16 (on the OBD-II) goes to +12 volt (allways hot).
pin 4 and 5 is ground, but I think that one is chassi and the other should be connected to the PCM. Pin 2 should go to the PCM serial data but it is 2 serial data cables out from the PCM. One called PCM Class 2(wire 1049) and the other only Class 2(710). On the LS1 scheme it is called Class2(1807) and UART(800). Does anyone have a electric scheme for this ? Thanks Magnus
pin 4 and 5 is ground, but I think that one is chassi and the other should be connected to the PCM. Pin 2 should go to the PCM serial data but it is 2 serial data cables out from the PCM. One called PCM Class 2(wire 1049) and the other only Class 2(710). On the LS1 scheme it is called Class2(1807) and UART(800). Does anyone have a electric scheme for this ? Thanks Magnus
it is in the sticky / FAQ
https://ls1tech.com/forums/conversions-swaps/312119-ls1-swap-faqs.html
about 1/3 of the way down..
Pin 2 - Purple - Serial Data Input
Pin 4 - Black - Ground
Pin 5 - Blk/wht - Ground
Pin 16 - orange - +12Volt Battery (Hot all of the time)
I just grounded both 4 and 5 to the chassic ground .. (I used the same ground point as the PCM and other related grounds)
https://ls1tech.com/forums/conversions-swaps/312119-ls1-swap-faqs.html
about 1/3 of the way down..
Pin 2 - Purple - Serial Data Input
Pin 4 - Black - Ground
Pin 5 - Blk/wht - Ground
Pin 16 - orange - +12Volt Battery (Hot all of the time)
I just grounded both 4 and 5 to the chassic ground .. (I used the same ground point as the PCM and other related grounds)
two serial data's come out of the PCM, one goes to a splice pack, that goes to many other modules including the diagnostic port. The other class 2 data is a "backdoor" line of communication with the Body Control Module.
Use the GREEN class 2 wire from the PCM for you're OBD2 port. If my memory serves me right, the other is Yellow.
good luck.
Use the GREEN class 2 wire from the PCM for you're OBD2 port. If my memory serves me right, the other is Yellow.
good luck.
Thread Starter
Staging Lane
Joined: Mar 2008
Posts: 57
Likes: 0
From: Stockholm, Sweden
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For parts to build OBD2 ports, www.mouser.com
plastic obd2 port, 0.90 each part# 829-12110250
pins for obd2 port, 0.09 each part# 829-12129373
blue locks, holds pin in, 0.19 each part# 829-12160437
I buy parts for 10 obd2 ports at a time, about $20 shipped. Much cheaper this route.
plastic obd2 port, 0.90 each part# 829-12110250
pins for obd2 port, 0.09 each part# 829-12129373
blue locks, holds pin in, 0.19 each part# 829-12160437
I buy parts for 10 obd2 ports at a time, about $20 shipped. Much cheaper this route.
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yea its much cheaper the route he goes. I just needed the one so i ordered it from this site. it was like $16 shipped or something like that.
http://www.eficonnection.com/eficonn..._pigtails.aspx
http://www.eficonnection.com/eficonn..._pigtails.aspx
