Typical Enabling Conditions
WARNING: This page is about a different car, the 2024 Lexus ES 250, 2023 Lexus ES 250, 2022 Lexus ES 250, and 2021 Lexus ES 250. However, it is still accessible from the selected car via links, so may be relevant.
| Monitor runs whenever the following DTCs are not stored | None |
| All of the following conditions are met | - |
| Either of the following conditions is met | 1 or 2 |
| 1. Both of the following conditions are met | (a) and (b) |
| (a) Last thermostat heater output terminal voltage level | Low |
| (b) Current thermostat heater output terminal voltage level | Low |
| 2. Both of the following conditions are met | (c) and (d) |
| (c) Last thermostat heater output terminal voltage level | High |
| (d) Current thermostat heater output terminal voltage level | High |
| Battery voltage | 8 V or higher |
| Starter | Off |
| Command to thermostat heater | Off |