DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 72 (Motor Generator Control System (AWD) - Diagnostic Codes (2 Of 5)) >> MOTOR GENERATOR CONTROL SYSTEM (for AWD) >> DTC P0A91-00: Drive Motor "B" Performance [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 magnetic force deterioration of the permanent magnet located in the rotor inside the rear motor (MGR) has been detected. The cause of this malfunction may be one of the following:

    Area Main Malfunction Description
    Inverter Inverter with converter assembly internal circuit malfunction
    Rear traction motor with transaxle assembly
    • Rear motor (MGR) internal malfunction (entry of foreign matter, etc.)
    • Rear motor (MGR) permanent magnet magnetic force deterioration
    • Open or short circuit in the rear motor coils
    Inverter low-voltage circuit The connectors are not connected properly
    HV floor under wire (rear traction motor cable)
    • Defective HV floor under wire (rear traction motor cable) connection condition
    • Open circuit or poor insulation in HV floor under wire (rear traction motor cable)
    Hybrid vehicle control ECU Hybrid vehicle control ECU internal circuit malfunction