Typical Enabling Conditions
WARNING: This page is about a different car, the 2024 Lexus IS 500, 2023 Lexus IS 500, and 2022 Lexus IS 500. However, it is still accessible from the selected car via links, so may be relevant.
ALL
| Monitor runs whenever the following DTCs are not stored | None |
COLD START MONITOR
| All of the following conditions are met | - |
| Battery voltage | 10.5 V or higher |
| Time after engine start | 1 second or more |
| Engine coolant temperature at engine start | Less than 60°C (140°F) |
| Soak time | 0 seconds or more |
| Accumulated mass air flow | 5928 g or more |
| Engine | Running |
| Fuel cut | Off |
| Engine coolant temperature sensor circuit fail (P0115, P0117, P0118, P0125) | Not detected |
| Intake air temperature sensor circuit fail (P0112, P0113) | Not detected |
| Thermostat fail (P0128) | Not detected |
| Difference between engine coolant temperature at engine start and intake air temperature | Less than 40°C (72°F) |
SOAK MONITOR
| All of the following conditions are met | - |
| Battery voltage | 10.5 V or higher |
| Engine | Running |
| Soak time | 5 hours or more |
| Either of the following conditions is met | (a) or (b) |
| (a) Engine coolant temperature | 60°C (140°F) or higher |
| (b) Accumulated mass air flow | 11856 g or more |
| Engine coolant temperature sensor circuit fail (P0115, P0117, P0118, P0125) | Not detected |
| Thermostat fail (P0128) | Not detected |
| Soak timer fail (P2610) | Not detected |