P0AA1-773

DESCRIPTION

Refer to the circuit description for DTC P0AA1-224. (Click here)

DTC No.	INF Code	DTC Detection Condition	Trouble Area
P0AA1	773	System main relay No.1 on the HV battery positive side stuck closed	HV relay assembly

WIRING DIAGRAM

See the wiring diagram of P0AA1-224. (Click here)

INSPECTION PROCEDURE

CAUTION:

1. Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from reconnecting it while you are working on the high-voltage system.
   
2. After disconnecting the service plug grip, wait for at least 5 minutes before touching any of the high-voltage connectors or terminals.
   

HINT:

At least 5 minutes is required to discharge the high-voltage capacitor inside the w/ converter inverter assembly.

1. CHECK HV RELAY ASSEMBLY

CAUTION:

Be sure to wear insulated gloves.

1. Turn the ignition switch off and remove the service plug grip. (Click here)

   NOTICE:

   Do not put the vehicle into the READY-on state with the service plug grip removed as this may cause a malfunction.

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance:

   Tester Connection	Specified Condition
   S47-1 - S44-1	10 kΩ or higher

   HINT:

   1. If a system main relay is stuck closed, inspect the HV relay assembly without removing it from the vehicle, in order to keep the relay closed.
      
   2. If P0AA1-773 is output, the HV relay assembly must be replaced. Measuring resistance can determine that this is either a present or past malfunction.
      
   3. If the resistance is between 28.5 and 31.5 Ω, it can be determined that the system main relay No.1 is stuck closed.
      

NG	REPLACE HV RELAY ASSEMBLY

OK
REPLACE HV RELAY ASSEMBLY