P3227

L110 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P3227-583,P3228-584: Converter Temperature Sensor Circuit Low

DTC P3227-583 - Converter Temperature Sensor Circuit Low

DTC P3228-584 - Converter Temperature Sensor Circuit High

DESCRIPTION

The MG ECU uses a temperature sensor that is built into the boost converter to detect the boost converter temperature. The boost converter temperature sensor outputs a voltage that varies between 0 and 5 V in accordance with changes in the temperature. The higher the boost converter temperature, the lower the output voltage. Conversely, the lower the temperature, the higher the output voltage. The MG ECU limits the load based on signals transmitted by the boost converter temperature sensor, in order to prevent the converter from overheating. The MG ECU also detects malfunctions in the wiring of the boost converter temperature sensor, as well as in the sensor itself.









INSPECTION PROCEDURE
CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

1. REPLACE INVERTER WITH CONVERTER ASSEMBLY
NEXT -- COMPLETED