DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 109 (Hybrid Control System (AWD) - Diagnostic Codes (5 Of 6)) >> HYBRID CONTROL SYSTEM (for AWD) >> DTC P1C81-49: High Voltage Power Resource Circuit Consumption Circuit Short; DTC P1C82-49: High Voltage Power Resource Circuit Over Loading [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 monitors the high-voltage wiring between the HV battery and inverter with converter assembly and detects a short circuit malfunction or high-voltage system operation malfunction.

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

    Battery current sensor (IB) circuit malfunction 

    • Battery current sensor (IB) malfunction
    • Motor generator control ECU (MG ECU) malfunction
    • Communication (wire harness) malfunction

    High voltage system malfunction 

    • HV battery malfunction
    • HV battery junction block assembly malfunction
    • Inverter with converter assembly malfunction
    • Air conditioner system malfunction
    • Voltage inverter assembly (w/ 1500W voltage inverter)
    • High-voltage wire harness malfunction
    • High-voltage connector or connection malfunction

    Low-voltage circuit (12 V) malfunction 

    • Hybrid vehicle control ECU malfunction
    • Low voltage wire harness malfunction
    • Low voltage connector malfunction
  2. INSPECTION DESCRIPTION 
    GTY876946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    System Diagram Location Inspection Content Reason Inspection Step
    *a Check high-voltage wiring connection condition of the air conditioner compressor with motor assembly Check for short circuit 2, 4
    *b Check the high voltage cables between the HV battery junction block assembly and inverter with converter assembly. Check for short circuit 3, 5
    *c Check high-voltage wiring connection condition of the voltage inverter assembly (w/ 1500W voltage inverter) Check for short circuit 6, 7