DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 84 (Motor Generator Control System (2WD) - Diagnostic Codes (1 Of 4)) >> MOTOR GENERATOR CONTROL SYSTEM (for 2WD) >> DTC P0A78-9E: Drive Motor "A" Inverter Stuck On; DTC P1C5D-19: Drive Motor "A" Inverter Circuit Current Above Threshold [12/2019 - 11/2023] >> DTC Summary

DTC Summary

WARNING: This page is about a different variant/trim than selected.
  1. MALFUNCTION DESCRIPTION 

    This DTC indicates that a large current flowed through the motor inverter. The cause of this malfunction may be one of the following:

    Area Main Malfunction Description
    Hybrid vehicle transaxle assembly
    • Open or short circuit in the motor coils
    • Motor (MG2) internal malfunction (iron particles or damage from foreign objects)
    Resolver Open or short circuit in the motor resolver
    Inverter 
    • Inverter internal circuit malfunction
    • Malfunction in ECU that controls the inverter
    • Inverter control sensor (current sensor, VH sensor, VL sensor)
    Inverter cooling system
    • Inverter water pump assembly malfunction
    • Coolant leak
    • Frozen
    • Blockage
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