DTC P0A0A-13: High Voltage System Interlock Circuit Open; DTC P0A0A-92: High Voltage System Interlock Performance or Incorrect Operation [12/2019 - 11/2023]: Description

When the hybrid vehicle control ECU detects that a safety device (interlock) is operated, such as when the service plug grip, inverter cover or rear traction motor cable (HV floor under wire) is removed, it will prohibit hybrid system operation or shut off the system main relay. The 3 safety devices are located as follows; 1 in the service plug grip, 1 on the inverter cover for the terminals of the inverter with converter assembly motor cable and generator cable, 1 on rear traction motor cable (HV floor under wire) that is connected to the inverter with converter assembly. If the service plug grip, inverter cover, rear traction motor cable (HV floor under wire) is removed, the interlock signal line will be open. If the vehicle is being driven, this condition will be determined to be an open circuit and the system main relays will not be shut off. When the safety devices are re-installed correctly, the system will return to normal when the ignition switch is turned to ON.

The system main relay will be turned off from the next trip after the open is detected until the condition returns to normal.