Propulsion unit changed

[Ksotob747]

Recently the propulsion unit failed and was brought in for replacement.

After replacement, the “Check EV system” warning is constantly on. The car works and charges perfectly, but the warning is always there.
Toyota looked into the Toyota and Tesla computers onboard. They said there was an error indicated inside the battery with the contactors. This is interesting because the battery contactors were perfect before the propulsion unit change.

Question: 1. Does anyone else have a “Check EV system” warning and there car works perfectly? 2. Does anyone have contactor problems with their battery and harm is it to the car? 3. Are the contactors difficult to change?

 

[hokiematt]

Search this forum for contactor replacement, you'll find multiple posts. The short answer is: contactor failure is becoming more prevalent on these vehicles. It is unrelated to your drive unit replacement, just coincidental timing.

While the contactors themselves are fairly inexpensive, the battery pack must be removed from the vehicle and opened in order to service them; no Toyota dealer is going to perform this kind of work, you'll need to find an independent EV shop. A few members have tackled this job themselves, but it's definitely not a beginner level project.

At some point (sooner than later), your contactors will fail and leave you stranded.