B1472

AIR CONDITIONING SYSTEM: B1472/72: A/C Inverter High Voltage Output System Malfunction

DTC B1472/72 - A/C Inverter High Voltage Output System Malfunction

DESCRIPTION

The inverter in the w/ motor compressor 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 past DTC. The compressor operation remains stopped until both the past and present DTCs are cleared.
CAUTION:
- Wear electrically insulated gloves and pull out the service plug grip before inspection as procedures may require disconnecting high-voltage connector. 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 5 minutes after the service plug grip is removed.
HINT: 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 system are output simultaneously.





INSPECTION PROCEDURE

PROCEDURE

1. CHECK MULTIPLEX COMMUNICATION SYSTEM
(a) Use the Techstream to check if the Multiplex Communication System is functioning normally.
Result:






B -- GO TO MULTIPLEX COMMUNICATION SYSTEM
A -- Continue to next step.
2. 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 How to Proceed With Troubleshooting
A -- REPLACE W/MOTOR COMPRESSOR ASSEMBLY