PCM Help

[bowtiekid]

I got the PCM scanned to day and I have the following codes being thrown..


23: IAT sesnor, Low temperature indicated
26: EVAP Purge Control Circuit Fault
37: TCC brake switch errorm TCC Brake switch stuck on
51: Faulty or incorrect PROM/EPROM


37 could be caused by the B&M Shift+ thing module I have.

26 states its a wiring error

23 I dont even know how I could have low temp indicated when I dont even have a CAI lol

51 could that be my tune??


Ive been through 3 or 4 pcms in this car already http://www.ls1tech.com/forums/images/smilies/LS1Tech/gr_banghead.gif something is eating it..

Should I get a used harness and use that?

Or buy a new one and call it a day?

[JoeliusZ28]

im curious what the code is trying to communicate with "low temperature indicated." do you have any logs to tell you what your IAT is actually reading?

[bad93ta]

is this a 93 car?

[Fixxer99TA]

Well, if you have eaten 3 PCMs so far and this one is throwing random codes now too, I would be checking all the wiring. Theres a reason that the PCMs keep getting killed, and I would be willing to bet that all these codes are just the PCM doing its usual again.

You have a short somewhere, your going to have to either find it or get yourself a new harness first. THEN you can diag everything else, if its even still there when you fix the PCM issue :D

[LT1_Fireman]

I would go ahead and buy a new harness and save myself a head ache.Trust me when I say shorts in a harness are a nightmare to track down.