B1477

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1477/77: A/C Inverter Low Voltage Power Resource System Malfunction
B1477/77 - A/C Inverter Low Voltage Power Resource System Malfunction

DESCRIPTION

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

The output DTC is memorized as previous trouble. Compressor control may not resume unless the power switch is turned off.





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:
* 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 Service Precautions.
* 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:





B -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting

A -- REPLACE COMPRESSOR WITH MOTOR ASSEMBLY Removal