Hello and thanks for asking,
Try this procedure and let me know if you need further assistance.
Do you only have 1 remote?
Most likely its a fault with the reciever module.
But first you need to check the fuse listed below and the keyless entry relay.
If both check out ok with either a testlight/voltmeter or ohm meter,,then replace the reciever module.
Sorry..the K series (4x4) ,,,,,the module is located behind the left hand sound panel insulator..its more than likely the culprit.