DTC P0A93-346: Inverter Cooling System Performance [11/2016 - ]: Description
WARNING: This page is about a different car, the 2019 Toyota Highlander, 2018 Toyota Highlander, and 2017 Toyota Highlander. 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 the generator (MG1) and motor (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 hybrid vehicle control ECU assembly monitors the inverter water pump assembly, cooling fan and cooling system, and detects malfunctions.
| *1 | Inverter Water Pump Assembly | *2 | Inverter Reserve Tank Assembly |
| *3 | Inverter with Converter Assembly | *4 | Radiator Assembly (HV) |
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P0A93-346 | Inverter Cooling System Performance | Inverter coolant temperature increases as well as the temperature of any inverter with converter assembly related parts due to an inverter cooling system malfunction. (1 trip detection logic) |
|
Comes on | Master Warning Light: Comes on |
RELATED DATA LIST
| DTC No. | ECU Data List |
|---|---|
| P0A93-346 |
|
The following items can be helpful when performing repairs:
Data List
- Vehicle Spd
- Ambient Temperature
Operation History Data
- Coolant Heating