Heated Windshield - If Equipped

WARNING: This page is about a different car, the 2020 Jaguar XE and 2019 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.

Heated windshield operation is only enabled when the vehicle is in Power Mode 7 (Engine running). The HVAC controls operation of the heated windshield using a relay in the right Engine Junction Box (EJB). When a request is made for heated windshield operation, the HVAC broadcasts a message to the BCM /GWM on the HS CAN comfort systems bus. On receipt of the message, the right EJB energizes the relay by providing a ground path for the relay coil. This allows a battery feed to flow across the relay to power the left and right heater elements.

There are 2 modes of heated windshield operation manual and automatic.

Manual operation is activated by pressing the heated windshield switch. When the switch is pressed, the status LED in the switch illuminates and the windshield heater elements are energized. Manual operation is discontinued when the heated windshield switch is pressed a second time, between 2 and 5 minutes have elapsed (dependent on ambient air temperature), or the engine stops. If manual operation is discontinued by the engine stopping, the previous heating phase is resumed if the engine is re-started within 30 seconds.

There are 2 variants of automatic operation automatic operation at the start of a journey and automatic operation during a journey.

Automatic operation at the start of a journey is initiated for between 2 and 5 minutes have elapsed (dependent on ambient air temperature). The warmer the ambient air temperature, the shorter the time. In this instance, the switch LED is illuminated and the heater elements are energized. In addition to shorter operating times in temperate winter conditions, there are condition qualifiers to prevent subsequent operations when the passenger compartment, engine or screen is warm, or there is a significant sunload. Automatic operation is discontinued if the heated windshield switch is pressed or the engine stops. Note: This feature can be selected on and off on the in the 'Climate' menu in the IDMA . Automatic operation during a journey is initiated when low ambient air temperatures are experienced and the vehicle has been traveling for a set period of time above a threshold speed. In this instance, no feedback is given to inform the driver that the heated windshield is operational (the switch LED is not illuminated) and the duration of operation is variable depending upon the ambient air temperature, vehicle speed and the amount of time the vehicle has been traveling.