I noticed the remote was getting lazy when locking/unlocking the car, so decided to replace the batteries. As a caution I did this at home with both set of keys available. The first key worked fine but the second key only locked the car, but did not unlock! After confirming that the micro switch worked, I checked the forum and found this: - Open the drivers door and insert the key and turn to ignition, but don't start the engine. Wait 10 seconds then press the unlock button on the key twice (the