Toyota Prius 2010 Repair Manual page 130

DTC B1476/76 A/C Inverter Load System Malfunction
DESCRIPTION
The compressor with motor assembly stops compressor control and outputs this DTC if the rotation load is too
large or too small while controlling motor rotation in the compressor with motor assembly.
Possible causes are refrigerant gas leakage, overcharged refrigerant gas, insufficient cooling because of a
condenser fan circuit malfunction, or compressor lock.
DTC No.
Motor rotation load while the compressor is operating is too
B1476/76
large or too small.
INSPECTION PROCEDURE
CAUTION:
Wear electrically 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.
NOTICE:
The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following the
flow chart for the hybrid control system first if any DTCs from those systems are output simultaneously.
PROCEDURE
1. CHECK CAN COMMUNICATION SYSTEM
(a) Using the Techstream to check if the CAN communication system is functioning normally.
Result:
CAN DTC is not output
CAN DTC is output
B
GO TO CAN COMMUNICATION SYSTEM
2010 Toyota Prius
DTC Detection Condition
Result
Trouble Area
Refrigerant volume
Compressor with motor
assembly
Cooling fan system
CAN communication system
Proceed to
A
B
Repair Manual