MR_Loyale Posted April 3, 2008 Share Posted April 3, 2008 I am just curious if anyone knows what is in the ECM? Is it a custom microcontroller, an off the shelf microcontroller or a version of a general purpose CPU? Has anyone ever taken one apart to see what is in it? How much RAM etc? Quote Link to comment Share on other sites More sharing options...
msteel Posted April 3, 2008 Share Posted April 3, 2008 I am just curious if anyone knows what is in the ECM? Is it a custom microcontroller, an off the shelf microcontroller or a version of a general purpose CPU? Has anyone ever taken one apart to see what is in it? How much RAM etc? I've had one open. It has a standard EPROM that looks like it is set up so it can be programmed in-circuit. If I remember correctly there is also a pretty standard static RAM. All storage would be miniscule compared to today's desktops. I didn't recognize the numbers on the two bigger chips, but didn't bother to look them up. They were made by Hitachi (surprise, surprise). Lots of other miscellaneous stuff, I think some TTL, probably some analog stuff too. Quote Link to comment Share on other sites More sharing options...
Cougar Posted April 4, 2008 Share Posted April 4, 2008 Lots of other miscellaneous stuff, I think some TTL, probably some analog stuff too. You are correct Msteel. I have repaired some ECUs that had some problems in the analog area. Quote Link to comment Share on other sites More sharing options...
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