AIR CONDITIONING SYSTEM, Diagnostic DTC:B1477/77

DTC Code DTC Name
B1477/77 A/C Inverter Low Voltage Power Resource System Malfunction

DESCRIPTION

The compressor with motor assembly monitors the controlling power voltage in the circuit. It stops the compressor circuit and outputs the DTC when the monitored voltage is outside the specified range.

The output DTC is memorized as a past DTC. The compressor control may not resume unless the power switch is turned OFF.

DTC No. DTC Detection Condition Trouble Area
B1477/77 An open or short to ground in the inverter's controlling power voltage circuit

  • Compressor with motor assembly

  • CAN communication system

PROCEDURE


  1. CHECK DTC (CAN COMMUNICATION SYSTEM)


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

      Result
      Result Proceed to
      CAN DTC is not output A
      CAN DTC is output (for LHD) B
      CAN DTC is 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