Shuts off while driving after replacing the BCM?

Tiny
REARDRIVE
  • MEMBER
  • 1992 CADILLAC DEVILLE
  • 4.9L
  • V8
  • 2WD
  • AUTOMATIC
  • 200,036 MILES
The ECM and BCM. I changed the BCM now the car shuts off while driving the service engine and service vehicle soon pop on. I pull up these codes F-F32-FF-.7'0, and E-E30- E52-EE-E30- F32. Now I'm thinking about changing the ECM, Are the ECM and the BCM the same thing? Where is the ECM location and can I get a picture of the ECM?
Tuesday, January 3rd, 2023 AT 5:18 AM

7 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,207 POSTS
Hello,

The BCM and PCM are different things but in the same location here are the instructions for changing them out. I would search google or eBay to find rebuilt units that come preprogrammed so the job will be plug and play. Check out the images (below). Please let us know if you need anything else to get the problem fixed.
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Tuesday, January 3rd, 2023 AT 10:26 AM
Tiny
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  • MEMBER
  • 93 POSTS
Are the ECM and the PCM the same thing? Can I see a picture of the ECM for the car listed above?
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Wednesday, January 4th, 2023 AT 3:15 PM
Tiny
KEN L
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Yep, the PCM and ECM are the same thing.
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Wednesday, January 4th, 2023 AT 8:20 PM
Tiny
REARDRIVE
  • MEMBER
  • 93 POSTS
Now I am having locating the ECM it is not behind glove box, all I see is two silver module one is the BCM and the other one is the Air bag deployment control module. I removed the right side kick no ECM. I heard the ECM has red, white and blue connectors I think the ECM is silver too. I replace the BCM still get F-F32- FF-F32 service engine soon and service vehicle soon lights are on they will go out for a while they will pop back on.
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Sunday, January 8th, 2023 AT 11:51 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,207 POSTS
When you replaced the BCM was it preprogrammed?
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Monday, January 9th, 2023 AT 2:03 PM
Tiny
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  • MEMBER
  • 93 POSTS
I got the BCM from rock auto, they stated it didn't need any programming just take the prom from the old one and put it in the new one. I found the ECM at the bottom of the A/C and heater case it set behind the A/C and heater case. Can you show me or tell me how to get to it, lot of stuff in front of it.
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Monday, January 9th, 2023 AT 3:44 PM
Tiny
KEN L
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Okay, yep, they just show the location you need to remove anything in front of it to get it out of there. All we have is the instructions in the diagrams above but if you upload images of the problem, I can help walk you through it.
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Tuesday, January 10th, 2023 AT 12:11 PM

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