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View Full Version : pcm noy detected on scan only wtf?


z28ls1818
December 14th, 2009, 05:45 PM
ok i just go my roadrunner pcm from another member. i put the license info in the license part. i can communicate with the rr but when i try to connect with the scan only via the obd2 port it says pcm not detected but at the bottom of the scanner it says connected. where it says pcm not connected is int he black screen part in the console section. i put connect and on that part while trying to connect it says pcm not detefted, ecm not detected. wtf lol any help thanks
using windows 7.
mr.prick
December 15th, 2009, 02:56 AM
Do you mean TCM?
LC1 vehicles do not have a TCM.
As long as the status bar shows connected and
the OBDII options are active you are connected to the PCM.
z28ls1818
December 15th, 2009, 03:15 AM
Do you mean TCM?
LC1 vehicles do not have a TCM.
As long as the status bar shows connected and
the OBDII options are active you are connected to the PCM.

on there it says it but it says

pcm not detected

ecm not detected

tcm not detected

could it be related to vats?

cause when i do a full reflash with my bin on the rr pcm it works initially. i can connect on the scanner and when i turn the ignition only the fuel gauge and my fuel pump are working(98to 02os). the fuel pump primes for 2 to 3 secs and the fuel gauge works. but then i go and close the file after a reflash. and i turn the ignition off and retry to connect and it wont let me, the above pcm ecm and tcm say not detected. also the fuel pump only primes for half the time then what it should and my fuel gauge jumps to full, but it was working before i turned the igntion off wtf
mr.prick
December 15th, 2009, 03:32 AM
Try performing a VATS re-link.
In the Tune.exe there is a key icon at the top tool bar. (Ctrl+Home)
Then try setting {G1201} Anti Theft Configuration to None.
This maybe necessary because of the 98 PCM conversion.

I think it is also necessary to consolidate the 3 connectors from
the PCM to the IPC into 2.
http://www.lt1swap.com/98-02_ls1.htm

Did you do a segment swap for the fuel system?
I don't know which vehicle it needs to come from but
I do know it must be from the same OS.