P3226 / INF562

DTC P3226-562 DC/DC Boost Converter Temperature Sensor
DTC P3226-563 DC/DC Boost Converter Temperature Sensor

DESCRIPTION

DTC Detection Condition:

The MG ECU located in the inverter with converter assembly detects the temperature of the boost inverter using a temperature sensor built into the inverter with converter assembly. The inverter cooling system is the same as that for MG2 and MG1, and it operates independently of the engine cooling system. The MG ECU uses the signal from the boost converter temperature sensor to check the effectiveness of the inverter cooling system. If necessary, the MG ECU will limit inverter output to prevent inverter overheating. The ECU also detects malfunctions in the boost converter temperature sensor.

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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.

NOTE: If the water pump with motor bracket assembly is the final part to be replaced after performing the inspection procedure, be sure to inspect the INV W/P fuse for continuity. If there is no continuity, replace the water pump with motor bracket assembly and the INV W/P fuse.

HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.