AIR CONDITIONING SYSTEM, Diagnostic DTC:B1474/74

DTC Code DTC Name
B1474/74 A/C Inverter Malfunction

DESCRIPTION

DTC No. DTC Detecting Condition Trouble Area
B1474/74 A/C inverter malfunction

  • Compressor with motor assembly

  • CAN communication 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.

Note


  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work Click here.

  • 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


    1. Using the intelligent tester to check if the CAN communication system is functioning normally.

      Result
      Result Proceed to
      CAN DTC is output A
      CAN DTC is not output (for 2ZR-FXE) B
      CAN DTC is not output (for 5ZR-FXE) C

    B

    REPLACE COMPRESSOR WITH MOTOR ASSEMBLY (FOR 2ZR-FXE) Click here

    C

    REPLACE COMPRESSOR WITH MOTOR ASSEMBLY (FOR 5ZR-FXE) Click here

    A

    GO TO CAN COMMUNICATION SYSTEM Click here