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Home >> Toyota >> 2021 >> Mirai XLE >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Battery System - Diagnostic Codes (8 Of 8) & Symptom Tests >> Hybrid Battery System >> ECU Power Source Circuit [11/2020 - 12/2022] >> Description

ECU Power Source Circuit [11/2020 - 12/2022]: Description

If the ignition switch is ON, the EV control ECU applies current to the MREL terminal to turn the IGCT No. 2 relay on. This supplies power to the IGCT terminals.