Toyota Prius 2010 Repair Manual page 158

P0AA6-
DTC
611
DESCRIPTION
The DTC is stored if there is insulation trouble with the high-voltage circuits in the air conditioning system.
Possible causes are poor insulation in the compressor with motor assembly, or mixing of any oil other than ND-
OIL 11 in the refrigerant cycle.
The motor driven with high-voltage is built into the electrical compressor and is cooled directly with refrigerant.
Compressor oil (ND-OIL 11) with high insulation performance is used because a leakage of electrical power
may occur if regular compressor oil (ND-OIL 8) is used.
CAUTION:
Wear insulated gloves and pull out the service plug grip before inspection as procedures may require
disconnecting high-voltage connectors.
Be sure to carry the removed service plug grip because other workers may install it by mistake.
Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.
DTC No.
P0AA6-611 High voltage system insulation malfunction
WIRING DIAGRAM
2010 Toyota Prius
Hybrid Battery Voltage System Isolation Fault
DTC Detection Condition Trouble Area
Compressor oil
Refrigerant pipe line
Compressor with motor assembly
CAN communication system
Repair Manual