Air Conditioning System

DTC 72 A/C INVERTER HIGH VOLTAGE OUTPUT SYSTEM MALFUNCTION

CIRCUIT DESCRIPTION

Detection Item:

The high voltage is output from the A/C inverter assembly to the electric inverter compressor for driving the motor. Compressor control is stopped and the DTC is output if there is an open or short to ground in the output circuit.

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

CAUTION: Wear insulated gloves and pull out the service plug grip before inspection as procedures may require disconnecting high-voltage connectors.

HINT: The hybrid vehicle system and air conditioning system output DTCs separately. Inspect DTCs following the flow chart for the hybrid system first if any DTCs from those systems are output simultaneously.

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

Wiring Diagram:

Step 1:

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.