DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 113 (Hybrid Control System (2WD) - Diagnostic Codes (6 Of 7)) >> HYBRID CONTROL SYSTEM (for 2WD) >> DTC P321E-9F: Motor/Generator Shutdown Signal Stuck Off [12/2019 - 11/2023] >> DTC Summary

DTC Summary

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

    The hybrid vehicle control ECU detects malfunctions which prevent the inverter with converter assembly emergency shutdown circuit (HSDN) from shutting down the hybrid control system. Detection is performed when the ignition switch is turned to ON and during the shutdown sequence when the ignition switch is turned off.

    The cause of this malfunction may be one of the following:

    Hybrid vehicle control ECU and inverter with converter assembly shutdown circuit malfunction 

    • Hybrid vehicle control ECU malfunction
    • Connector or wire harness malfunction (between hybrid vehicle control ECU and inverter with converter assembly) malfunction
    • Inverter with converter assembly malfunction