Toyota Prius 2010 Repair Manual page 120

DTC B1472/72 A/C Inverter High Voltage Output System Malfunction
DESCRIPTION
The inverter in the compressor with motor assembly outputs high-voltage to operate the motor. If there is an
open or short in the output circuit, the ECU will stop compressor operation and output the DTC. The output
DTC will be memorized as a history DTC. The compressor operation remains stopped until both the history and
current DTCs are cleared.
DTC No.
Open or short in A/C inverter high voltage output
B1472/72
system.
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
A REPLACE COMPRESSOR WITH MOTOR ASSEMBLY
2010 Toyota Prius
DTC Detection Condition
Result
Trouble Area
Compressor with motor assembly
CAN communication system
Proceed to
A
B
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