HAZ: I found a thread about the ACC system. You seem to have a good knowledge of the ACC system and I was wondering if you could help me with my problem.
I bought a used 2020 Edge Titanium a few months ago with Adaptive Cruise Control (ACC). On a trip to visit some friends, the car was parked in their driveway facing the sun for and hour or so. On our way home I got the dreaded Camera Failure, Service required message. It has failed many times since then, I have measured the temperature of the module with temps as high as 145 degrees, and it usually fails at 126 degrees.
I bought two replacement modules, one from ebay to be the Guinea pig to take apart to look of a heating element, and a new one from Ford to be the permanent fix. I tried both of these in the car and they didn’t work because the As Built data had been changed to ACC. However, they didn’t get hot, just warm (98 degrees). Then, I programmed the As Built data into them so that they both worked in the ACC mode. But guess what, now the both got hot. In fact, the ebay one reached 145 deg on a warm day, but it didn’t fail. That was 53 degrees above the windshield temp. Last night I went for a drive when is was cool, the IPMA got to 103 degrees, 26 degrees above the windshield temp. My question is, is it normal for the IPMA get hot, if not what could be heating it to such a high temperature. Can you or anyone help me on this?