B1477

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

DTC 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.
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.





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.

PROCEDURE

1. CHECK DTC (CAN COMMUNICATION SYSTEM)
(a) Use the intelligent tester or Techstream to check if the CAN communication system is functioning normally.

Result





B -- GO TO CAN COMMUNICATION SYSTEM
A -- REPLACE COMPRESSOR WITH MOTOR ASSEMBLY