Overview - Single Battery Vehicles

WARNING: This page is about a different car, the 2015 Jaguar XF, 2014 Jaguar XF, and 2013 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

A single primary battery is located in the luggage compartment floor in a plastic molded tray.

A BMS (Battery Monitoring System) control module is mounted on the battery negative terminal. The BMS control module is integral with the battery negative cable and is controlled by the GWM (Gateway Module).

CAUTION: To avoid damaging the BMS control module, always use the ground (negative (-)) terminal stud point on the right side top mount. Never connect directly to the primary battery negative terminal when connecting a slave power supply to the vehicle, the BMS control module can be damaged.

If a new battery is fitted to the vehicle, the BMS control module will require re-calibrating using a Jaguar approved diagnostic system.

When the vehicle leaves the factory, a transit relay is fitted to the battery positive terminal. The transit relay is connected to the CJB (Central Junction Box) which limits the electrical functions to essential items only, to reduce loads on the battery. The transit relay must be removed from the vehicle during the PDI (Pre-Delivery Inspection). For additional information, refer to the PDI information.

The battery provides power to the BJB (Battery Junction Box). The BJB contains megafuses, delivering power to the RJB (Rear Junction Box), the EJB (Engine Junction Box) and the starter motor and generator. In addition to containing fuses and relays, the RJB and CJB contain software to control a number of vehicle systems. These functions are covered in the appropriate service information.

A jump start terminal is located adjacent to the EJB. A cover protects the terminal when not in use. If jump starting is required, the cover must be removed and the positive (+) jump lead attached securely. The negative (-) jump lead is attached to a stud located on the right side top mount. The cover must be fitted to the positive terminal when not in use.