DTC U3000-4B; Dc Converter Internal Temperature Malfunction: Notes

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSE

DTC U3000:4B	DC-DC converter internal temperature malfunction
DETECTION CONDITION	A condition in which the DC-DC converter internal temperature is abnormally high or low is detected.
FAIL-SAFE FUNCTION	Not applicable
POSSIBLE CAUSE	DC-DC converter malfunction
SYSTEM WIRING DIAGRAM	Not applicable