Toyota Prius 2010 Repair Manual page 126

DTC B1474/74 A/C Inverter Malfunction
DESCRIPTION
DTC No. DTC Detecting Condition
B1474/74 A/C inverter malfunction
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
Result
Trouble Area
Compressor with motor assembly
CAN communication system
A
B
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