DTC P0A93-346: Inverter Cooling System Performance [08/2013 - ]: Description
WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
The inverter converts the high-voltage direct current of the HV battery into alternating current for MG1 and MG2. The inverter generates heat during the conversion process. Therefore, the inverter is cooled by a special cooling system consisting of the inverter water pump assembly, the cooling fan, and a radiator. This cooling system is independent of the engine cooling system. The power management control ECU monitors the inverter water pump assembly, cooling fan and cooling system, and detects malfunctions.
TEXT IN ILLUSTRATION
| *1 | Inverter Water Pump Assembly | *2 | Inverter Reserve Tank Assembly |
| *3 | Inverter with Converter Assembly | *4 | Radiator Assembly (HV) |
| *5 | Hybrid Vehicle Transaxle Assembly | - | - |
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0A93 | 346 | Inverter cooling system (W/P) malfunction Inverter coolant temperature increases as well as the temperature of any inverter with converter assembly related parts increases. (1 trip detection logic) |
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