Lithim wrote:This may be of interest to people on this string:
As the owner of a 2012 IMIEV I recently received a letter from Mitsubishi.
...... " due to potential low durability of the capacitors on the circuit boards in the On-Board-Charger (OBC), the capacitors may short and cause the high voltage fuse in the Motor Control Units MCU) to blow. As a result, the drive battery may not be charged by regular charging and the 12V battery may not be charged. When this occurs, the power unit and 12V battery warning lights will turn on."
Mitsubishi is extending the warranty for the OBC to 10 years / unlimited miles.
Letter dated September 2019.
Mitsubishi Customer Relations; 1-888-648-7820 M-F 7AM.-4PM. PT
Stay charged my friend
That is sort of interesting, but I don't understand what 'potential low durability' means - they are either low durability or they are not - unless Mitsubishi don't have a handle on their third party supplier quality control in the way Toyota, for example do... That particular issue has brought down several companies I can think of, but notably Motorola with their cell phones.
I interpret this as meaning that due to a cars age, there may be age related degradation, meaning that those capacitors were not perhaps as good in the real world than as tested. Ive had a few Samsung TVs go with capacitors on the PSU - those were not durable either. It sort of also makes the case for topping up the battery, rather than fully charging, when those capacitors are given their longest workout.... but I don't do that.