Automatic Transmission Fluid Warming Valve
WARNING: This page is about a different car, the 2023 Jaguar F-Pace and 2022 Jaguar F-Pace. However, it is still accessible from the selected car via links, so may be relevant.
Regarding the operation of the ATF warming valve the following 3 phases can be differentiated:
- Warm-up phase - Hot engine coolant from the thermostatic valve of the ATF cooler is directed to the ATF cooler. This provides a reduced ATF warm-up time.
- Temperature control phase - Hot engine coolant from the thermostatic valve of the ATF cooler and cold engine coolant coming from the radiator are mixed. This provides an accurate control to maintain the ATF at the desired operation temperature
- Cooling phase - Cold engine coolant from the radiator is directed to the ATF cooler to provide the maximum ATF cooling capability.