This tutorial is also available in French
➔
Remote fob battery change on Defender
Vehicle ➔ Defender 110 Td5 2002
Difficulty ➔ Easy
Time ➔ 20 minutes
Summary
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The Defender remote fob battery usually lasts several years, but unfortunately it is not eternal. If the remote control no longer works properly or if the hazards no longer flash when you unlock the doors with the remote control, it is time to change the battery.
If the battery shows signs of weakness, change it immediately. If you delay too long, the Defender will refuse to start and will be immobilized.
The battery must be changed before the engine is immobilised. After turning off the ignition, the engine will be immobilised in 30 seconds if you open the driver's door and in 5 minutes if you do not open the driver's door. If you take too long to change the battery, you will have to enter the emergency access code before you can synchronize the remote control.
If you are changing the battery for the first time, take the new battery and tools with you, sit in the driver's seat and change the battery without opening the door. This will give you 5 minutes to open the remote control transmitter and change the battery.
Required Tools
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Open the remote control transmitter
Op 01
Disarm the Defender alarm system :
•
Place the ignition key in position 2.
•
Turn off the ignition.
After turning off the ignition, you must change the battery in :
• 30 seconds if you open the driver's door.
• 5 minutes if you do not open the driver's door.
• 30 seconds if you open the driver's door.
• 5 minutes if you do not open the driver's door.
Op 02
Unclip the remote control transmitter cover. Use a flathead screwdriver.
Start with the key ring side. This will prevent damage to the electronic board with the screwdriver.
Op 03
Open the remote control transmitter. Pull by hand.
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Change the battery
Op 04
Remove the battery from the remote control transmitter. Slide it with the first small piece of plastic that comes to hand.
Using a piece of plastic rather than a screwdriver avoids any risk of short circuit.
Op 05
Press one of the remote control buttons for 5 seconds.
This operation releases the residual voltage of the transmitter.
Op 06
Fit the new battery (CR2032) on the remote control transmitter. Slide the battery into its holder by hand.
The + terminal of the battery must be on top (1st photo).
Avoid touching the battery with your fingers. This could reduce its lifespan.
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Close the remote control transmitter
Op 07
Close the remote control transmitter. Press on the cover by hand.
Synchronize the remote control
Op 08
Press the lock button several times to synchronize the remote control.
Of course, this operation must be carried out near the Defender.
The End
