A part of your car’s keyless entry system seems to be the Jeep key fob. Modern Jeep models with key fobs remotely lock and unlock your Jeep doors, unlike older cars that require manual activity. So, the question is, how to change the battery in Jeep key fob?
To open your key fob, look for a small indentation or slot on the side or back. You can use a coin or small flathead screwdriver to pry it open, applying gentle pressure as you work around the fob to separate the two halves. Once you have it open, be sure to remove the old battery by carefully popping it out using a small tool like a screwdriver or fingernail. Before doing so, take note of the battery’s orientation.
Before changing the battery in your Jeep key fob, you should clearly know why your key isn’t working. Therefore, take immediate action if the Jeep key fob stops working and try to identify the specific issue. Continue reading for a better understanding!
Is The Jeep key not working: The most common issue!
It might be irritating when you must leave urgently, and your Jeep key isn’t working. Before exploring why the Jeep key might not work, let’s look at some potential symptoms. The following are the most common reasons for a Jeep key isn’t working;
- Key fob Battery
- Damaged Key
- Programming Issue
- Weak car battery
- Immobilizer
- Wrong key
- Brake Switch Issue
- Start Button
- Interference
Key fob Battery
Your key fob’s battery is either damaged or too weak. As a result, it cannot give the keyless entry system a powerful signal. You’ll need to buy new key battery packs and know how to change the battery in the Jeep key fob.
Damaged Key
One possible reason the Jeep key is not functioning is that it may have been damaged, such as from being dropped or exposed to water.
Programming Issue
There are a few ways programming issues could cause a Jeep key to malfunction.
- The key’s programming may be incorrect, which can cause it to be unable to communicate with Jeep’s computer system.
- The Jeep’s computer system may have a software issue or malfunction that causes it to be unable to recognize the key.
- The key and the Jeep’s computer system may not be compatible due to differences in software versions or hardware configurations.
- There may be a problem with the key fob battery, which can prevent the key from transmitting a signal to the jeep.
Weak car battery
Because of the battery’s partial discharge, the immobilizer module may not activate. If necessary, recharge the Jeep’s battery.
Immobilizer
Circuit board damage, water damage, or a software error are all sources of immobilizer system failure. An antenna or wiring problem may keep the keyless entry system from reading the signal from the key fob.
The Wrong Key
You are bearing the wrong key. See whether you didn’t grab the wrong set of keys.
Brake Switch Issue
Carefully press the brake pedal. The car might only start if the brake pedal is pressed down strongly enough or the brake pedal position switch is broken.
Start Button
The start button might not work correctly. It might not be making contact when you press it, for example.
Interference
The smart key can share a frequency with wireless devices such as after-market alarms and radar detectors, which can disrupt the key signals the Body Control Module gets (BCM).
Now you know the problem with your Jeep keys and when to change the battery. Here are a few steps on how to change the battery in your Jeep key fob;
How to Change a Jeep Key Fob Battery
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Since the Jeep key fob is just two snap-together pieces of plastic, learning how to open one and change the battery is simple. A tiny circuit board, a rubber keypad, and a battery are all present once the case is unzipped.
Jeep key fob batteries usually last three to four years. However, the battery can run out much sooner, depending on how often it is used. It’s time for a battery replacement if your key fob is no longer functional within 45 feet of your car.
Here are the steps:
Pop the Jeep key fob open with a screwdriver.
To open your key fob and access the battery, you will need a flathead screwdriver because it is constructed of plastic that snaps together. This can be achieved by inserting the screwdriver tip into the key fob’s seam (the part near the key ring). Many Jeep owners recommend using a pry bar.
Select Jeep models, such as the Jeep Renegade, must remove the pull-out metal ignition key before opening the key fob. Once the metal ignition key has been removed, store it safely.
Apply pressure to the screwdriver as you pry it open.
You can use the screwdriver tip alone or with soft material to lessen the chance of breaking the plastic, depending on how delicately you can complete this step.
Set the screwdriver tip near the Jeep key fob’s seam. With just the right level of force, pry it open (never twist), ensuring not to harm the key fob’s plastic components. If not, you won’t be able to construct it.
Take the Jeep Key Fob Battery out of its housing.
There are 5 parts of the Jeep key fob. They are;
- a hole for the keypad and the key attached to it are set in the first part of the house.
- Keypad
- A circuit board
- A battery
- And the second half of the housing holds the battery in place
Before removing the old battery, note its location to help you replace it without confusion. Also, pay attention to the circuit board. Lastly, if using a screwdriver to pull out the old battery, be careful not to scratch or damage the metal electrical contacts.
Insert the replacement battery.
The key fob battery’s negative side is often on the bottom, while the positive side is on top. This may not be relevant for all key fobs. To position the new battery, use the mental image of the old battery’s polarity as a guide. This is why I earlier advised noting its polarity.
Thankfully, some Jeep keychains have instructions printed on the battery socket, indicating the proper way to install the battery.
Reassemble the key fob components.
After changing the battery, you carefully put the other parts of the key fob back together. Insert the circuit board into the keypad first, then the keypad into the housing where it fits.
Once you’ve completed these steps, completing the following when reassembling is simple. Put half the rechargeable batteries on the circuit board and the numeric keyboard’s half.
Snap the key fob housings together.
Two parts of your key fob are now assembled. Carefully but firmly snap them together; start near the key ring and work your way to the other end of the casings. Ensure that the edges of the key fob housings are even with each other. Otherwise, the replacement key fob will not fit properly.
Conclusion
Finally, it doesn’t take much to replace the battery in your Jeep key fob; it’s simple maintenance you can do independently. If you stick to the directions, your key fob will quickly restore its power.
Moreover, ensure you have the new battery and the little flathead screwdriver needed to change the battery. Find a battery that suits your key fob properly. The manager must ensure that the key fob is always attentive and alert.
FAQs
What kind of battery is suitable for a key fob?
The most commonly used key fob is the CR2032. Further button cells are CR2450, CR2025, CR1616, and CR2016.
What is the lifespan of a key fob battery?
On average, the battery in a Jeep key fob will last between 3 to 4 years.
What is the cost of replacing a key fob battery?
The batteries cost $10 or less. Some fobs require two batteries for the key.
Exactly how similar are Jeep batteries?
No. Car batteries come in a variety of types to suit the specific needs of different vehicles.
How do I start my Jeep when the key fob is dead?
Insert the mechanical key into the designated slot, press the brake pedal, and press the start button while keeping the key in the slot.
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