Corolla's circuit diagram got an update while having to change the motor controller. The KDH12801E cannot be powered directly from the battery pack so a new 12V 5A isolated power supply P3 was added. Also the 400A main contactor had to be changed into one with a 12V coil voltage. Also added the K5 brake signal relay which is powered directly from Corolla's brake light signal. When the brake lights are lit, the K5 relay is activated, and the motor controller starts to regenerate with a constant motor current of about 50A. This way the regen is not strong but it is often effective enough so that Corolla's mechanical brakes are not needed.
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