Air Conditioning System (for Automatic Air Conditioning System)

AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): B1474/74: A/C Inverter Malfunction
B1474/74 - A/C Inverter Malfunction

DESCRIPTION

When there is a malfunction in the current output of the A/C inverter inside the compressor with motor assembly, compressor control is stopped and a DTC is stored.





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 to prevent other technicians from accidently reinstalling it.
* Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.
* After removing the service plug grip, turning the ignition switch to ON (READY) may cause a malfunction. Do not turn the ignition switch to ON (READY) unless instructed by the repair manual.
PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

(a) Using the Techstream, check if the CAN communication system is functioning normally.

Result:





C -- GO TO CAN COMMUNICATION SYSTEM Diagnosis System

B -- GO TO CAN COMMUNICATION SYSTEM Diagnosis System

A -- REPLACE COMPRESSOR WITH MOTOR ASSEMBLY Removal