The marker lights and license plate lights should flash as well.
5. VISUAL CONFIRMATION OF LOCK OR UNLOCK
During lock operation, when the back door ECU receives a lock signal from the door unlock detection SW, the taillight and
front parking light is flashed once. During unlock operation, when the back door ECU receives an unlock signal from the door
unlock detection SW, the taillight and front parking light is flashed twice.
According to the EWDs for 2002 and 2000, it is the tailights and the front parking lights: