AIR CONDITIONING SYSTEM, Diagnostic DTC:B1472/72

DTC Code DTC Name
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 EV control ECU will stop compressor operation and store this DTC. This DTC will be stored as a history DTC. The compressor operation remains stopped until both the history and current DTCs are cleared.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory
B1472/72 A/C Inverter High Voltage Output System Malfunction

Any of the following conditions is met:


  • Open in A/C inverter high voltage output system

  • Short in A/C inverter high voltage output system

  • Compressor with motor assembly

  • CAN communication system

 Memorized
DTC Detection Conditions
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition Power switch on (READY) ○ ○
Malfunction Status Open in A/C inverter high voltage output system ○ -
Short in A/C inverter high voltage output system - ○
Detection Time - -
Number of Trips 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

CAUTION / NOTICE / HINT

CAUTION:


  • Wear insulated gloves and pull out the service plug grip before inspection as procedures may require disconnecting high-voltage connectors. Carry the removed service plug in your pocket to prevent other technicians from accidentally reconnecting it while you are servicing the vehicle.

  • 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 (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

    Click here

  • The hybrid control system and air conditioning system output DTCs separately. Perform troubleshooting for the hybrid control system first if DTCs from these systems are output simultaneously.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Using the GTS, check if the CAN communication system is functioning normally.

      for LHD: Click here

      for RHD: Click here

      Result
      Result Proceed to
      CAN communication system DTCs are not output A
      CAN communication system DTCs are output (for LHD) B
      CAN communication system DTCs are output (for RHD) C

    A

    REPLACE COMPRESSOR WITH MOTOR ASSEMBLY Click here

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here