![]() This is an anti-theft measure taken by the manufacturer. In order to program a new key fob, either a third-party key fob programmer must be used or the vehicle must be taken to a Jeep dealer or automotive locksmith. Note: The procedure applies to all 2015-2020 Jeep Grand Cherokee versions. The Jeep Grand Cherokee does not come with self-programming capabilities. Now release the lock button on the key fob and remove the key from the ignition part. For five seconds, press the Lock button on your key fob. When the smart key or remote control cannot communicate properly with the vehicle's computer, the trouble begins, and when the OBD system comes to help us let us know what is wrong, but that is only one of the many things the obd2 system can provide information on. Switch the key in the ignition part to the On position. Usually, when this does not happen, the immobilizer is activated, which will prevent you from accessing the vehicle, let alone starting it. The receiver must detect the correct serial number to open or unlock. Insert the key into your vehicles ignition and turn it to the RUN position while simultaneously holding the UNLOCK button on your drivers door. Transponders emit a serial number on a low-level signal. ![]() Why? Because if you don't accomplish the steps in time, you have to start over because of the code change. Using any original (working) transmitter, press the UNLOCK button for 4 to 10 seconds. Attempt to function transmitter, if working as designed discontinue programming. This explains in some DIY key programming procedures why you must accomplish steps in, for example, 5 seconds. Press (LOCK) button 5 times at 2 second intervals to resynchronize transmitter. The fob or fob key is a security hardware device that generates an access code every 30 or 60 seconds. Step 4 Move the switch on the door to the lock position while the door is open. Step 3 Open the drivers door on the automobile and leave the door open. ![]() Step 2 Put your key in the Jeeps ignition and keep the key in the off position. The obd2 diagnostic procedure opened the way not only for workshops, but also for any user with some skill to find out what was wrong with their vehicle. Step 1 Enter your Jeep and make sure all of the doors and the trunk are closed. These computer systems monitor the sensors of the engine and emission control systems to make sure everything is operating correctly. On-Board Diagnosis or OBD is a standardized computer system that was installed in most 1996 vehcile models and newer cars. ![]()
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