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

for Preparation Click here


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 current DTCs are cleared.
The output DTC is memorized as previous trouble. Compressor control remains stopped unless the past and current DTCs are cleared by the intelligent tester.

CAUTION:
  1. 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.
  2. 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.


DTC No.
DTC Detecting Condition
Trouble Area
B1472/72
Open or short in A/C inverter high voltage output system.
w/ Motor compressor assembly

INSPECTION PROCEDURE

1.READ OUTPUT DTC (DTC B1472/72 IS OUTPUT AGAIN)

  1. Clear the DTC (Click here).

  1. Start the hybrid control system.

  1. Blower speed switch is at "LO".

  1. A/C switch is ON.

  1. Read the DTC (Click here).


Result:

Result
Proceed to
B1472/72 is output
A
B1472/72 is not output
B



B
REPLACE W/MOTOR COMPRESSOR ASSEMBLY
A

REPLACE W/MOTOR COMPRESSOR ASSEMBLY