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

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

When the hybrid vehicle control ECU detects that a safety device (interlock) is operated, such as when the service plug grip or inverter cover is removed, it will prohibit hybrid system operation or shut off the system main relay. The 2 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. If the service plug grip, inverter cover 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 ON.

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

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate
P0A0A-13	High Voltage System Interlock Circuit Open	Interlock signal line opens while the vehicle is being driven (at 5 km/h (3 mph) or more) (1 trip detection logic)	Wire harness or connector Hybrid vehicle control ECU Service plug grip	Does not come on	Master Warning: Comes on
P0A0A-92	High Voltage System Interlock Performance or Incorrect Operation	Either of the following conditions is met: With the vehicle stopped, the service plug grip with a safety device was removed. With the vehicle stopped, the interlock signal line became open. (1 trip detection logic)	Wire harness or connector Hybrid vehicle control ECU Service plug grip	Does not come on	Master Warning: Comes on