Battery: Description and Operation: Overview

Battery and Cables

OVERVIEW

Mounted on the battery negative terminal is a battery monitoring system module. The battery monitoring system module is integral with the battery negative cable and is controlled by the ECM (engine control module).

CAUTION: To avoid damaging the battery monitoring system module, always use a suitable body ground point rather than the battery negative terminal when connecting a slave power supply to the vehicle.
If a new battery is fitted to the vehicle, the battery monitoring system module will require re-calibrating using the Jaguar approved diagnostic system.
Fitted on the battery positive terminal is a transit relay. The transit relay must be removed from the vehicle during the Pre-Delivery Inspection (PDI). For additional information, refer to the PDI Manual.
The vehicle battery provides power to the BJB (battery junction box). The BJB (battery junction box) contains 3 megafuses, delivering power to the RJB (rear junction box), the CJB (central junction box) and the EJB (engine junction box). In addition to containing fuses and relays, the RJB (rear junction box) and RJB (rear junction box) contain software to control a number of vehicle systems. These functions are covered in the appropriate sections of this product.