How do I disassemble a 1992 ECM?
11-07-2010, 02:01 PM
#1
Burning Brakes
Thread Starter
How do I disassemble a 1992 ECM?
I tried to disassemble my ECM on my 1992 LT1. It looks like there is a box inside a box that might need to slide out. I didn't want to force anything for fear I might ruin it. I'm hoping somebody has been down this road before.
The reason I need to take it apart is because I have an intermittent problem. My torque converter lock randomly disengages after a few minutes of driving. Diacom shows aberrations of the speed signal generated by the ECM. I replaced the speed sensor and brake switch is good. I connected a switch directly to the 4L60 via ALDL connector to make sure all the components in the trans are good. I suspect there is some corrosion or a loose solder connection that needs to be corrected.
The reason I need to take it apart is because I have an intermittent problem. My torque converter lock randomly disengages after a few minutes of driving. Diacom shows aberrations of the speed signal generated by the ECM. I replaced the speed sensor and brake switch is good. I connected a switch directly to the 4L60 via ALDL connector to make sure all the components in the trans are good. I suspect there is some corrosion or a loose solder connection that needs to be corrected.
11-07-2010, 11:01 PM
#2
Drifting
-Remove Memcal
-Remove all screws on case.
-Remove screws on connector housing (Top).
-Slide out circuit board.
-Note there is a rubber seal between the metal case and the connector housing that may stick togather, it just take a little more effort.
Top View
Bottom View
Lower support removed
-Remove all screws on case.
-Remove screws on connector housing (Top).
-Slide out circuit board.
-Note there is a rubber seal between the metal case and the connector housing that may stick togather, it just take a little more effort.
Top View
Bottom View
Lower support removed
11-08-2010, 03:43 PM
#3
Burning Brakes
Thread Starter
Very good!
Yes, the rubber must be holding it. I'll pull a little harder and if need be apply a small amount of heat.
It also looks like I'll need to remove the conformal coating. There are a number of different types of conformal coatings. Do you know what kind of solvent to use?
Also, thank you very much for helping me!
Yes, the rubber must be holding it. I'll pull a little harder and if need be apply a small amount of heat.
It also looks like I'll need to remove the conformal coating. There are a number of different types of conformal coatings. Do you know what kind of solvent to use?
Also, thank you very much for helping me!
11-09-2010, 01:53 AM
#4
Drifting
The board in the pic looks a bit messy because it was rebuilt by Cardone and is coated with the varnish coating.
11-09-2010, 10:29 AM
#5
Burning Brakes
Thread Starter
As a profession I'm an electronic technician so a least trying to repair it seems to be the logical thing for me to do. I do know that the large scale integration (big chips) will be impossible for me to troubleshoot or replace so re-soldering will probably be my only recourse. I hate the thought of buying a rebuilt one.
Thanks again for your help and wish me luck!
Thanks again for your help and wish me luck!
11-09-2010, 05:52 PM
#6
Former Vendor
Member Since: May 2006
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As a profession I'm an electronic technician so a least trying to repair it seems to be the logical thing for me to do. I do know that the large scale integration (big chips) will be impossible for me to troubleshoot or replace so re-soldering will probably be my only recourse. I hate the thought of buying a rebuilt one.
Thanks again for your help and wish me luck!
Thanks again for your help and wish me luck!
04-27-2016, 01:49 PM
#8
Pro
i want to disassemble the ECU on my 96 C4, only to have the 2 outer cases powder coated. Is this possible/easy? Don't want to break or ruin the ecu in the process.
