ARK
Well-Known Member
- Joined
- Aug 21, 2020
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- Los Angeles
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- '21 Premium SR AWD
Would a fair summary be that Kia created an ICCU that is not beefy enough, they identified the issue, but rather than proactively replace everyone’s ICCU, they pushed a software fix that should (1) stop it from becoming an issue, and (2) if it has become an issue, throw up a code and prevent catastrophic failure until that part can be replaced by Kia?I have no idea about the AC, but all fixed now.
The ICCU is a different part in the eGMP cars which has some similarities to the HVBJB, but differences in terms of the failure that occurred.
The ICCU governs charging, V2L, and 12V maintenance. It has logic circuitry, some kind of contactors, and active cooling of the module (imagine that!). What happened with these failures is that some software error caused an over-voltage in the ICCU which damaged some of the logic board circuitry. When this condition occurs, a unique DTC is stored by the car silently. Sometimes the over-voltage causes an ICCU failure right away along with the main HV fuse. Other times, apparently, the ICCU can be damaged by the over-voltage, but will not fail until later on. The damage is to the logic electronics, not to physical contactors, but the effect is similar when it fails -- you are limited to 15mph or your car just stops. There can be other warnings and strange things that happen before it completely fails, as some of the electronics go flaky before failing completely.
The service campaign KIA started yesterday (and Hyundai and Genesis to follow any minute now) checks to see whether the car ever experienced this over-voltage condition in its DTC history. If the DTC ever happened, KIA replaces the ICCU proactively with a new one without requiring it to fail. And it also updates a module that caused the over-voltage condition to prevent any future damage.
All of this being said, I wish I could just use my FDRS setup to flash this myself with some donuts....
I will miss your posts, but that parallel is a little too uncanny! Hope you never experience it though.
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