Variable Coolant Pump
WARNING: This page is about a different car, the 2018 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.
| ITEM | DESCRIPTION |
|---|---|
| 1 | Variable coolant pump shroud solenoid |
| 2 | Variable coolant pump shroud position sensor |
The variable coolant pump is located at the front of the cylinder block.
The Powertrain Control Module (PCM) determines the required level of cooling upon the following inputs:
- Cylinder head temperature
- Cylinder block temperature
- Ambient temperatures
- Engine coolant temperature
- Minimum flow map.
The calibration is able to control the variable coolant pump flow in five steps and is controlled by an open-loop map.
The control of the shroud solenoid is by a Pulse Width Modulation (PWM) signal from the PCM. The internal pressure within the pump acts against a return spring in the housing. Without a signal from the PCM the solenoid is de-energized. Therefore the shroud returns to its base position under spring force, resulting in full flow from the coolant pump.