ASCD Set Indicator Lamp
WARNING: This page is about a different car, the 2005 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
The ASCD set indicator lamp is controlled by the ECM.
When the ASCD system is turned on and the speed is set, the ECM signals the combination meter (unified meter control unit) via the CAN lines and ground is provided to the SET indicator lamp.
When power and ground are supplied, the set indicator lamp illuminates.