Experiencing issues with your 2000 Lexus Rx300 Key Fob can be frustrating. Many owners of this classic SUV encounter problems ranging from a non-responsive remote to difficulties with door locks. This guide addresses common key fob problems and provides troubleshooting steps based on real-world experiences.
One owner recently shared their journey in diagnosing a key fob and door lock issue on their 2000 Lexus RX300. Initially, they suspected the key fob battery. Using a Fluke 87 multimeter, they confirmed the battery was at 3.0 volts. However, unsure of the current draw when buttons are pressed, they proactively replaced the battery.
Alt: Replacing the battery in a 2000 Lexus RX300 key fob, a common first step in troubleshooting remote issues.
Despite the new battery, the key fob LED indicator remained off. This prompted further investigation. Upon opening the remote, they discovered “open circuits” on the button contacts. Employing a magnifier scope, they meticulously re-soldered the button contacts and inspected all pads and traces. This repair successfully lit up the LED indicator on the key fob.
However, even with the LED now functioning, the key fob still failed to remotely lock, unlock, or activate the panic alarm. The owner then explored online forums and resources to identify the next steps. Suggestions ranged from issues with the back door jamb to a faulty actuator or receiver.
To check the receiver and attempt reprogramming, they followed the standard Lexus key fob reprogramming procedure. Unfortunately, this did not resolve the problem. The “can not remotely lock, unlock or panic” issue persisted.
Further investigation revealed another critical clue: the rear passenger door would not manually lock or unlock, although the power lock system was operational. This pointed towards a potential problem with the door lock actuator.
Upon removing the door panel and disconnecting the actuator connector, the owner found they could manually lock and unlock the rear passenger door. Reconnecting the actuator connector restored the power lock functionality but again prevented manual locking. Visual inspection of the switch and gears revealed no obvious damage or obstructions.
Alt: Diagram showing the location of the door lock actuator within the door panel of a 2000 Lexus RX300, a component often involved in remote locking problems.
Despite attempts to reprogram the remote buttons again, the key fob remained unresponsive. While initially hesitant to blame the actuator, the owner decided to order a replacement actuator from eBay as a relatively inexpensive troubleshooting step. A 12-volt battery disconnect was performed to reset the vehicle’s computer, but this also did not resolve the key fob issue.
This detailed troubleshooting process highlights the complexities that can arise when diagnosing 2000 Lexus RX300 key fob problems. While a dead battery or button contact issues are common, problems can also stem from the door lock actuator or potentially the vehicle’s receiver. Further diagnostic steps, potentially involving a tool like TechStream, may be necessary to pinpoint the exact cause and implement a successful repair.
