Battery: Description and Operation

Battery and Cables

COMPONENT LOCATION

NOTE:
Typical installation shown









INTRODUCTION
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). The battery monitoring system module is connected to the CJB (central junction box) on a LIN (local interconnect network) bus and communicates with the ECM (engine control module) via the high speed CAN (controller area network) bus.

CAUTION: To avoid damaging the battery monitoring system module and maintain the correct system operation, 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 need to be reset using a Land Rover 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.

BATTERY
Diesel variants use a 90 Ah/950 A SAE battery.
Petrol variants use a 90 Ah/800 A SAE battery, cold climate markets use a 90 Ah/950 A EN battery.
The battery is located in the engine compartment, on the passenger side. It sits in a tray and is secured with clamp plates and bolts.
The battery terminal posts allow for the battery cables to be connected with clamp type connections.
When removing the battery, ensure the alarm is disarmed and the ignition is switched off. Always disconnect the negative terminal first and then the positive. When refitting the battery, always fit the positive terminal first followed by the negative.
If the battery requires recharging, always use an approved constant current charger, designed for lead-calcium batteries. DO NOT use a fast charger, as permanent damage to the battery may occur. Always ensure that the charger is connected to a suitable grounding point and not the battery negative terminal.

Transportation Relay





During production of the vehicle a transportation relay is installed on the battery positive terminal, to minimize battery drain during vehicle storage and delivery. The transportation relay provides an automatic means of disconnecting power from all of the electrical systems on the vehicle, but allows power to be easily restored to start and drive the vehicle during loading, unloading and storage.
To start the vehicle when a transportation relay is installed press the hazard warning switch, this activates the transportation relay to power up and allow's the engine to be started. If the ignition is turned on but the engine is not started the vehicle will return transportation mode after 15 seconds.
The transportation relay must be removed from the vehicle prior to customer handover, but no more than 24 hours beforehand in accordance with the battery care procedure.

Battery Monitoring System

NOTE:
Typical battery monitoring system module shown





The battery monitoring system module measures various battery parameters and calculates appropriate values to maintain optimum battery charging. The battery monitoring system module is connected to the CJB (central junction box) over a LIN (local interconnect network) bus connection. The CJB (central junction box) then forwards the values received on the LIN (local interconnect network) bus from the battery monitoring system module to the ECM (engine control module) over the high speed CAN (controller area network) bus.
The information received by the ECM (engine control module) is used to control the generator target setpoint and also to control the load management function which is in place to ensure that the vehicle loads are controlled in a manner which maximizes the attributes, whilst protecting the vehicle.
In the event of a system fault, a warning is displayed within the instrument cluster, DTC (diagnostic trouble code)'s are recorded in the appropriate modules (CJB (central junction box) / ECM (engine control module)) and a failsafe strategy is activated. The failsafe strategy includes the switching off of any loads which are controlled via the load management system to help maintain Gasoline System function.
The Land Rover approved diagnostic system can be used to interrogate the DTC (diagnostic trouble code)'s from both ECM (engine control module) and CJB (central junction box) which will provide information relating to any existing or historic fault conditions. The diagnostic tester also has a diagnostic routine which is in place diagnose every component involved within the power supply system. The routine is self explanatory and provides a definitive result for each of the individual power supply system components to enable accurate diagnosis of any faults.

CAUTION: Due to the self-calibration routine, it is recommended that all power supply diagnostic testing is carried out using a Land Rover approved diagnostic system rather than a digital multimeter.


JUNCTION BOXES
A number of junction boxes are used to distribute power throughout the vehicle. For more information on fuse ratings and circuits protected, refer to the Electrical Circuit Diagrams.

Battery Junction Box
The BJB (battery junction box) is located in the engine compartment and is mounted on the bulkhead behind the battery. The BJB (battery junction box) receives its power supply from the battery and contains 7 fusible links.

Battery Junction Box 2
The BJB (battery junction box) 2 is mounted on the engine bulkhead, behind the battery. The BJB (battery junction box) receives its power supply from the battery and contains 2 fusible links.

Engine Junction Box (EJB)
The EJB (engine junction box) is located in the engine compartment on the RH side and receives its power feed from the BJB (battery junction box) 2.

Central Junction Box
The CJB (central junction box) is located behind the glove box and receives its power supplies from the BJB (battery junction box). The CJB (central junction box) is a "smart" fusebox and provides various vehicle level functions. The CJB (central junction box) contains fusible links, blade fuses and relays.

Rear Junction Box
The rear junction box is located on the RH (right-hand) side of the luggage compartment, behind the side trim casing. The rear junction box contains blade fuses and relays, and receives its main power supply from the BJB (battery junction box).