Toyota Prius 2010 Repair Manual page 127

DTC B1475/75 A/C Inverter Cooling / Heating System Malfunction
DESCRIPTION
The temperature sensor of the compressor with motor assembly detects inverter temperature.
If the temperature exceeds the maximum, the compressor with motor assembly stops compressor operation, and
this DTC will be stored.
DTC No.
Cooling water temperature in the inverter is outside the specified
B1475/75 range (temperature is too high), or there is an open or short to ground
in the temperature sensor circuit.
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
Cooling fan system
Refrigerant volume
Compressor with motor
assembly
CAN communication
system
Proceed to
A
B
Repair Manual