Air Conditioning System

DTC 75 A/C INVERTER COOLING/HEATING SYSTEM MALFUNCTION

CIRCUIT DESCRIPTION

Detection Item:

The A/C inverter in the A/C inverter assembly monitors the cooling water temperature with the temperature sensor. It stops compressor control and outputs the DTC when the monitored temperature is outside specified range (too high or too low).

The hybrid system and the air conditioning system monitor the cooling water temperature separately. If DTCs referring to an inverter cooling system malfunction are output simultaneously, there may be trouble such as insufficient cooling water.

If DTCs are output only for the air conditioning system, there may be an open or short in the temperature sensor circuit in the inverter.

Step 1 - 2:

INSPECTION PROCEDURE

NOTE: The A/C inverter is integrated with the inverter assembly. It is necessary to replace the PCU box assembly the A/C inverter (inverter assembly) needs to be replaced because the A/C inverter (inverter assembly) cannot be replaced alone.