Disconnecting and connecting the battery (Defender 2007+)

General procedures

Warnings:

• Batteries normally emit explosive gases that can cause injury, so keep open flames away from the battery. Always protect your face and eyes when charging or working near the battery. Always provide adequate ventilation. Failure to follow these instructions may result in injury.
• Batteries contain sulfuric acid, so avoid contact with skin, eyes and clothing. When working near a battery, protect your face and eyes from possible acid splashes. If acid comes into contact with your skin or eyes, rinse the affected area immediately with water for at least 15 minutes and seek immediate medical attention. If swallowed, seek immediate medical attention. Failure to follow these instructions may result in injury.

CAUTION: Before disconnecting the negative battery cable, make sure the engine is not running. Failure to do so may result in damage to the vehicle's electrical system.

NOTE: This procedure should be used to disconnect the battery when performing repairs for which it is specified.

Note: Before disconnecting the battery, make sure that no data is required from the engine Control module (ECM), as disconnecting the wires from the battery will erase all fault codes and engine idle/ driving parameters stored in the Permanent Storage memory (KAM).

1. Find out and write down the audio unit code and the preset radio station frequencies.

2. Remove the left front seat.

For more information, refer to the chapter: Front seat cushion (501-10 Seat, Removal and installation).



3.

NOTE: The illustration shows the right side, the procedure is similar on the left side.

Remove the battery cover. Release the clamp.



4.

CAUTION: Failure to follow this procedure may result in the alarm siren sounding unintentionally when the battery is disconnected.

Disconnect the ground cable from the battery.

• Loosen the nut.
• Turn the ignition key to the on position.
• Turn the ignition key to the off position.
• Within 17 seconds after turning the ignition key to the OFF position, disconnect the ground cable from the battery.