P0A0D / INF350

DTC P0A0D-350 High Voltage System Inter-Lock Circuit High
DTC P0A0D-351 High Voltage System Inter-Lock Circuit High

DESCRIPTION

DTC Detection Condition:

When the hybrid vehicle control ECU detects that a safety device is operated, it will prohibit the hybrid system operation or shut off the system main relay. There are three safety devices in three different locations. The first safety device is located at the service plug grip. The second one is located at the air conditioner fuse maintenance connector cover of the inverter with converter assembly. The third one is located at the air conditioning harness assembly that is connected to the inverter with converter assembly. If the service plug grip, inverter with converter assembly connector cover, or air conditioning harness assembly is removed, the interlock signal line will be open. If the vehicle is being driven, this condition will be determined to be an open malfunction and the system main relay will not be shut off. If the safety devices are installed correctly, the system returns to normal when the power switch is turned on (IG).

Wiring Diagram:

Step 1-3:

Step 4-6:

Step 7-8:

Step 8(Continued)-9:

Step 10-12:

Step 12(Continued)-14:

Step 14(Continued)-16:

Step 16(Continued)-17:

Step 17(Continued):

INSPECTION PROCEDURE

CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.