DTC B1474-4B: A/C Inverter Cooling/Heating Over Temperature [08/2023 - ]: Description
WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.
The temperature sensor of the compressor with motor assembly detects the A/C inverter temperature.
If the temperature exceeds the maximum, operation of the compressor with motor assembly will be stopped, and this DTC will be stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|---|
| B1474-4B | A/C Inverter Cooling/Heating Over Temperature | Diagnosis Condition:
Malfunction:
Detection Time:
|
|
Does not come on | Memorized | Air Conditioner | A | - |