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Home >> Toyota >> 2012 >> Highlander Hybrid >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Vehicle Control System (Diagnostic Codes (P0A69-677 - P0A79-716)) (Hybrid) >> Hybrid Control System >> DTC P0A78-121: Drive Motor "A" Inverter Performance >> Monitor Description

Monitor Description

If the motor inverter detects overvoltage, it transmits an overvoltage signal to the MG ECU. Upon receiving this signal, the hybrid vehicle control ECU illuminates the MIL and stores a DTC.