2004 Jaguar XJRFACTORY OEM SERVICE PROCEDURE

SUNLOAD/Light Sensor

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 Jaguar XKR, 2009 Jaguar XK8, 2008 Jaguar XKR, 2008 Jaguar XK8, and 2007 Jaguar XKR. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Sunload/Light Sensor
GJ0009847Courtesy of JAGUAR CARS, INC.

The sunload/light sensor consists of 2 photoelectric cells that provide the automatic temperature control (ATC) module with inputs of light intensity; one as sensed coming from the left of the vehicle and one as sensed coming from the right. The inputs are a measure of the solar heating effect on vehicle occupants, and are used by the automatic temperature control (ATC) module to adjust blower speed, temperature and distribution to improve comfort.

NOTE: The solar sensor is also used as part of the Autolamp feature and also contains the active anti-theft alarm indicator light emitting diode (LED). Refer to Exterior Lighting and Anti-Theft - Active article.

The sensor is installed in the center of the instrument panel upper surface and is powered by a 5 V feed from the instrument cluster.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.