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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 66 (Hybrid Control System - Diagnostic Codes (7 Of 7) & Circuit Tests (1 Of 2)) >> HYBRID CONTROL SYSTEM (for PHEV Model) >> DTC P31DB-9E: AC Inverter Drive Signal Stuck On [08/2023 - ] >> DTC Summary

DTC Summary

WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.
  1. MALFUNCTION DESCRIPTION 

    The hybrid vehicle control ECU detects a malfunction indicating that the drive of the voltage inverter cannot be cut off.

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

    Wire harness malfunction 

    • Wire harness malfunction (between hybrid vehicle control ECU and voltage inverter)
    • Wire harness malfunction (between electric vehicle charger assembly and voltage inverter)

    Hybrid vehicle control ECU malfunction 

    1. Hybrid vehicle control ECU internal malfunction

    Electric vehicle charger assembly malfunction 

    1. Electric vehicle charger assembly internal malfunction

    Voltage inverter malfunction 

    1. Voltage inverter internal malfunction