B1472

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1472/72: A/C Inverter High Voltage Output System Malfunction
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 ECU will stop compressor operation and output the DTC. The output DTC will be memorized as a history DTC. The compressor operation remains stopped until both the history and current DTCs are cleared.





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:
The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following procedure for the hybrid control system first if any DTCs from those systems are output simultaneously.

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Result:





B -- GO TO CAN COMMUNICATION SYSTEM CAN Communication System

A -- REPLACE COMPRESSOR WITH MOTOR ASSEMBLY Removal