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JUSTASBC
August 3rd, 2010, 12:44 PM
I have searched high and low, and have been unable to find the proper wiring for the LC-1 (as both NB, and WB) with the V2. Can anyone help me out? I have a 7 wire LC-1, and I have a 4 wire O2 sensor (2 black wires, blue wire, and white wire)
Thanks

ChipsByAl
August 3rd, 2010, 12:52 PM
What is the year, make and model of the vehicle you are trying to setup? Look here, lots to find with Google. http://www.ls1tech.com/forums/pcm-diagnostics-tuning/419524-heres-how-wire-lc1-work-wideband-narrowband-same-time.html
Al

JUSTASBC
August 3rd, 2010, 12:58 PM
I have an 05 Silverado 5.3l. I have read that post, and when I try and open the "LC1 connections", I get oops, link is broken. That looks like what I need to see, but I just can't see it.

joecar
August 4th, 2010, 10:41 AM
You have to look at a PCM wire schematic for your truck to make sure that the NBO2 heater power/ground is not switched by the PCM... if it is, then you have to power the LC-1 from a source other than the NBO2 heater power/ground.

joecar
August 4th, 2010, 10:46 AM
The LC-1 has Channel 1 (yellow) programmed to emulate the NBO2 signal...
connect yellow to NBO2 signal and green to NBO2 signal return.

More info (some of the links are old/broken):

LC-1 tutorial:
showthread.php?t=1012 (http://forum.efilive.com/showthread.php?t=1012)
showthread.php?t=564 (http://forum.efilive.com/showthread.php?t=564)


BTW: regardless of NBO2 emulation, you should be using serial comms connection to FlashScan V2, see here:

V2 serial/digital wideband logging:
showthread.php?t=8858 (http://forum.efilive.com/showthread.php?t=8858)
showthread.php?t=8115 (http://forum.efilive.com/showthread.php?t=8115)
showthread.php?t=10251 (http://forum.efilive.com/showthread.php?t=10251) post #2

V2 serial/digital AFR input (LC-1):
showthread.php?t=8115 (http://forum.efilive.com/showthread.php?t=8115)
showthread.php?t=7532 (http://forum.efilive.com/showthread.php?t=7532)
showthread.php?t=8348 (http://forum.efilive.com/showthread.php?t=8348)
showthread.php?t=9340 (http://forum.efilive.com/showthread.php?t=9340) post #3

JUSTASBC
August 4th, 2010, 02:13 PM
Thanks, that looks like just what I need.