1994 Cadillac Deville PCM

1994 CADILLAC DEVILLE
218,000 MILES • V8 • 2WD • AUTOMATIC
Avatar
JJOHNSTON2
  • MEMBER
  • 6 POSTS
I Ran the on-board diagnostic and it doesn't recognize the pcm. It shows "PCM?". Took to a shop because it failed an AIMs test and he said he couldnt connect to my computer. WHat should i do?
Mar 12, 2010 at 5:50 PM
Advertisement
Avatar
FACTORYJACK
  • ✓ASE Certified Mechanic
  • 4,159 POSTS
  • ASE Certified Mechanic
This is a 94, and the vehicle does run? After you press off and warmer, and it does the segment check, it displays 'PCM?'? It would display that after it went through displaying all the codes. If it didn't recognize the PCM, it would either not even be there, or it would display 'no pcm data'. At any rate, when it displays 'PCM?', press fan up. It should change to PCM codes, PCM data, PCM overrides, or PCM clear codes. Fan down will scroll through the choices, fan up will select. See what that does.
Mar 14, 2010 at 1:18 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.